INVESTMENTS - STRS JVs individual Investments (Details) € in Thousands, £ in Thousands, shares in Thousands, $ in Thousands |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
shares
|
Dec. 31, 2024
USD ($)
shares
|
Dec. 31, 2025
CAD ($)
shares
|
Dec. 31, 2025
EUR (€)
shares
|
Dec. 31, 2025
GBP (£)
shares
|
Dec. 31, 2024
CAD ($)
shares
|
Dec. 31, 2023
USD ($)
|
|
| Schedule of Investments [Line Items] | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember | us-gaap:SecuredOvernightFinancingRateSofrMember | |||||
| Investment Owned, at Cost | $ 607,574,000 | $ 695,240,000 | |||||
| Investment Owned, at Fair Value | 578,649,000 | $ 642,213,000 | |||||
| Money Market Fair Value | $ 5,187,000 | ||||||
| Percent of net assets | 222.70% | 224.40% | 222.70% | 222.70% | 222.70% | 224.40% | |
| Total investments and money market funds amortized cost | $ 628,622,000 | $ 708,489,000 | |||||
| Total investments and money market funds fair value | $ 599,697,000 | $ 655,462,000 | |||||
| Total investments and money market funds percentage | 230.80% | 229.00% | 230.80% | 230.80% | 230.80% | 229.00% | |
| STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 323,601,000 | $ 296,752,000 | |||||
| Investments owned non-accrual status | 0 | 0 | |||||
| Investment Owned, at Fair Value | $ 323,552,000 | $ 294,957,000 | |||||
| Fair Value As A Percentage of Member's Equity | 984.30% | 852.30% | |||||
| Percent of net assets | 984.30% | 852.30% | 984.30% | 984.30% | 984.30% | 852.30% | |
| Total investments and money market funds amortized cost | $ 329,483,000 | $ 297,519,000 | |||||
| Total investments and money market funds fair value | $ 329,434,000 | $ 295,724,000 | |||||
| Total investments and money market funds percentage | 1002.20% | 854.50% | 1002.20% | 1002.20% | 1002.20% | 854.50% | |
| Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 3.70% | ||||||
| Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 3.70% | ||||||
| Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 3.60% | ||||||
| Prime Rate [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 6.80% | ||||||
| Canadian Dollar Offered Rate Three Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 2.30% | ||||||
| Euro Interbank Offered Rate One Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 1.90% | ||||||
| Euro Interbank Offered Rate Three Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 2.00% | ||||||
| Euro Interbank Offered Rate Six Month Term [Member] | |||||||
| Schedule of Investments [Line Items] | |||||||
| Rate of interest on investment per duration period | 2.10% | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 5.25% | 5.25% | |||||
| Investment Interest Rate | 9.78% | 9.78% | |||||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | |||||
| Investment Owned, Balance, Principal Amount | $ 78,000 | ||||||
| Investment Owned, at Cost | 78,000 | ||||||
| Investment Owned, at Fair Value | $ 80,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.20% | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 5.25% | 5.25% | |||||
| Investment Interest Rate | 9.78% | 9.78% | |||||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | |||||
| Investment Owned, at Fair Value | $ 5,000 | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 5.25% | 5.25% | |||||
| Investment Interest Rate | 9.79% | 9.79% | |||||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,962,000 | ||||||
| Investment Owned, at Cost | 7,866,000 | ||||||
| Investment Owned, at Fair Value | $ 7,919,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 22.90% | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation, First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.25% | 5.25% | 5.25% | 5.25% | |||
| Investment Interest Rate | 8.97% | 8.97% | 8.97% | 8.97% | |||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 408,000 | ||||||
| Investment Owned, at Cost | 405,000 | ||||||
| Investment Owned, at Fair Value | $ 409,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.20% | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.25% | 5.25% | 5.25% | 5.25% | |||
| Investment Interest Rate | 8.97% | 8.97% | 8.97% | 8.97% | |||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |||
| Investment Owned, at Fair Value | $ 5,000 | ||||||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.25% | 5.25% | 5.25% | 5.25% | |||
| Investment Interest Rate | 8.97% | 8.97% | 8.97% | 8.97% | |||
| Investment, Acquisition Date | Sep. 19, 2024 | ||||||
| Investment Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 13,039,000 | ||||||
| Investment Owned, at Cost | 12,922,000 | ||||||
| Investment Owned, at Fair Value | $ 12,973,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 39.50% | ||||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ABBCon-ciseOpticalGroupLLCMember | whfcl:ABBCon-ciseOpticalGroupLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | Health Care Supplies | Health Care Supplies | Health Care Supplies | Health Care Supplies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | |
| Investment Interest Rate | 11.34% | 11.98% | 11.34% | 11.34% | 11.34% | 11.98% | |
| Investment, Acquisition Date | Feb. 23, 2022 | Feb. 23, 2022 | |||||
| Investment Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 20,409,000 | $ 20,409,000 | |||||
| Investment Owned, at Cost | 20,227,000 | 20,142,000 | |||||
| Investment Owned, at Fair Value | $ 20,026,000 | $ 19,535,000 | |||||
| Percent of net assets | 7.70% | 6.80% | 7.70% | 7.70% | 7.70% | 6.80% | |
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.40% | 10.40% | |||||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | |||||
| Investment Owned, at Fair Value | $ 15,000 | ||||||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.40% | 10.40% | |||||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | |||||
| Investment Owned, at Fair Value | $ 6,000 | ||||||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.40% | 10.40% | |||||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,080,000 | ||||||
| Investment Owned, at Cost | 4,027,000 | ||||||
| Investment Owned, at Fair Value | $ 4,070,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 11.80% | ||||||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.39% | 9.39% | 9.39% | 9.39% | |||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | |||
| Investment Owned, at Fair Value | $ 15,000 | ||||||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.39% | 9.39% | 9.39% | 9.39% | |||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | |||
| Investment Owned, at Fair Value | $ 6,000 | ||||||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.39% | 9.39% | 9.39% | 9.39% | |||
| Investment, Acquisition Date | Apr. 26, 2024 | ||||||
| Investment Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 4,046,000 | ||||||
| Investment Owned, at Cost | 4,002,000 | ||||||
| Investment Owned, at Fair Value | $ 4,046,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 12.30% | ||||||
| Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Alvaria Holdco [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.96% | 11.96% | |||||
| Investment, Acquisition Date | Mar. 20, 2024 | ||||||
| Investment Maturity Date | May 08, 2028 | May 08, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,782,000 | ||||||
| Investment Owned, at Cost | 1,615,000 | ||||||
| Investment Owned, at Fair Value | $ 1,456,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 6.50% | 6.50% | |||||
| Investment, Interest Rate, Paid in Cash | 5.46% | 5.46% | |||||
| Percent of net assets | 0.50% | 0.50% | |||||
| Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Two | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Alvaria Holdco [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 7.00% | 7.00% | |||||
| Investment Interest Rate | 11.46% | 11.46% | |||||
| Investment, Acquisition Date | Mar. 20, 2024 | ||||||
| Investment Maturity Date | May 08, 2028 | May 08, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,600,000 | ||||||
| Investment Owned, at Cost | 9,318,000 | ||||||
| Investment Owned, at Fair Value | $ 3,990,000 | ||||||
| Percent of net assets | 1.40% | 1.40% | |||||
| Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.), First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Alvaria Holdco [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.96% | 11.96% | |||||
| Investment, Acquisition Date | Mar. 20, 2024 | ||||||
| Investment Maturity Date | May 08, 2028 | May 08, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,178,000 | ||||||
| Investment Owned, at Cost | 1,029,000 | ||||||
| Investment Owned, at Fair Value | $ 451,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 5.50% | 5.50% | |||||
| Investment, Interest Rate, Paid in Cash | 6.46% | 6.46% | |||||
| Percent of net assets | 0.20% | 0.20% | |||||
| Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.), First Lien Secured Term Loan Three | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Alvaria Holdco [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 7.00% | 7.00% | |||||
| Investment Interest Rate | 11.46% | 11.46% | |||||
| Investment, Acquisition Date | Mar. 20, 2024 | ||||||
| Investment Maturity Date | May 08, 2028 | May 08, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,400,000 | ||||||
| Investment Owned, at Cost | 2,330,000 | ||||||
| Investment Owned, at Fair Value | $ 74,000 | ||||||
| Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsHoldingsLlcMember | whfcl:AmericanCraftsHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Acquisition Date | Dec. 22, 2022 | ||||||
| Investment Maturity Date | Dec. 22, 2032 | Dec. 22, 2032 | |||||
| Investment, Identifier [Axis]: American Crafts Lc Super Priority First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Jul. 25, 2023 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,191,000 | ||||||
| Investment Owned, at Cost | $ 2,094,000 | ||||||
| Investment Owned, at Fair Value | $ 1,878,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Investment Interest Rate | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Jan. 25, 2022 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,823,000 | ||||||
| Investment Owned, at Cost | $ 1,458,000 | ||||||
| Investment Owned, at Fair Value | 93,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Investment Interest Rate | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | May 28, 2021 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,859,000 | ||||||
| Investment Owned, at Cost | $ 8,720,000 | ||||||
| Investment Owned, at Fair Value | 553,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Investment, Identifier [Axis]: American Crafts, LC Priority First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Dec. 22, 2022 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,876,000 | ||||||
| Investment Owned, at Cost | $ 5,105,000 | ||||||
| Investment Owned, at Fair Value | 3,226,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | May 02, 2024 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,485,000 | ||||||
| Investment Owned, at Cost | 2,374,000 | ||||||
| Investment Owned, at Fair Value | $ 373,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan one | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | whfcl:AmericanCraftsLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Jan. 31, 2024 | ||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,287,000 | ||||||
| Investment Owned, at Cost | $ 1,230,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.96% | 12.96% | |||||
| Investment, Identifier [Axis]: Apollon Holdings, LLC (d/b/a Apollon Wealth Management, LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApollonHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.33% | 9.33% | 9.33% | 9.33% | |||
| Investment, Acquisition Date | Jul. 21, 2025 | ||||||
| Investment Maturity Date | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | |||
| Investment Owned, Balance, Principal Amount | $ 2,372,000 | ||||||
| Investment Owned, at Cost | 2,339,000 | ||||||
| Investment Owned, at Fair Value | $ 2,442,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 7.40% | ||||||
| Investment, Identifier [Axis]: Apollon Holdings, LLC (d/b/a Apollon Wealth Management, LLC) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApollonHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.37% | 9.37% | 9.37% | 9.37% | |||
| Investment, Acquisition Date | Jul. 21, 2025 | ||||||
| Investment Maturity Date | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | |||
| Investment Owned, Balance, Principal Amount | $ 6,633,000 | ||||||
| Investment Owned, at Cost | 6,542,000 | ||||||
| Investment Owned, at Fair Value | $ 6,632,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 20.20% | ||||||
| Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanGpLlcMember | whfcl:ArcserveCaymanGpLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | |||||
| Investment Owned, Balance, Shares | shares | 663 | 663 | 663 | 663 | |||
| Investment Owned, Balance, Principal Amount | $ 663,000 | ||||||
| Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) Common Units One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanGpLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |||
| Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | |
| Investment, Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | |||||
| Investment Maturity Date | Jan. 04, 2027 | Jan. 04, 2027 | Jan. 04, 2027 | Jan. 04, 2027 | Jan. 04, 2027 | Jan. 04, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 781,000 | $ 689,000 | |||||
| Investment Owned, at Cost | 775,000 | 677,000 | |||||
| Investment Owned, at Fair Value | $ 1,240,000 | $ 1,247,000 | |||||
| Investment, Interest Rate, Paid in Kind | 11.99% | 12.67% | 11.99% | 11.99% | 11.99% | 12.67% | |
| Percent of net assets | 0.50% | 0.40% | 0.50% | 0.50% | 0.50% | 0.40% | |
| Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | |||||
| Investment Maturity Date | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 636,000 | $ 581,000 | |||||
| Investment Owned, at Cost | 627,000 | 569,000 | |||||
| Investment Owned, at Fair Value | $ 636,000 | $ 581,000 | |||||
| Investment, Interest Rate, Paid in Kind | 9.00% | 9.00% | 9.00% | 9.00% | 9.00% | 9.00% | |
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan Two | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment Interest Rate | 9.00% | 9.00% | 9.00% | 9.00% | |||
| Investment, Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | |||||
| Investment Maturity Date | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 650,000 | $ 594,000 | |||||
| Investment Owned, at Cost | 642,000 | 583,000 | |||||
| Investment Owned, at Fair Value | $ 650,000 | $ 594,000 | |||||
| Investment, Interest Rate, Paid in Kind | 9.00% | 9.00% | |||||
| Percent of net assets | 0.30% | 0.20% | 0.30% | 0.30% | 0.30% | 0.20% | |
| Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanTopcoLpMember | whfcl:ArcserveCaymanTopcoLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | |||||
| Investment Owned, Balance, Shares | shares | 663 | 663 | 663 | 663 | |||
| Investment Owned, Balance, Principal Amount | $ 663,000 | ||||||
| Investment Owned, at Cost | $ 19,568,000 | 19,568,000 | |||||
| Investment Owned, at Fair Value | $ 9,144,000 | $ 9,131,000 | |||||
| Percent of net assets | 3.50% | 3.20% | 3.50% | 3.50% | 3.50% | 3.20% | |
| Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) Common Units Two | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanTopcoLpMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |||
| Investment Owned, at Fair Value | $ 9,144,000 | $ 9,131,000 | |||||
| Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArteriocyteMedicalSystemsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.00% | 5.00% | |||||
| Investment Interest Rate | 9.33% | 9.33% | |||||
| Investment, Acquisition Date | Oct. 25, 2023 | ||||||
| Investment Maturity Date | Oct. 18, 2028 | Oct. 18, 2028 | |||||
| Investment Owned, at Fair Value | $ 9,000 | ||||||
| Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArteriocyteMedicalSystemsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.00% | 5.00% | |||||
| Investment Interest Rate | 9.33% | 9.33% | |||||
| Investment, Acquisition Date | Oct. 25, 2023 | ||||||
| Investment Maturity Date | Oct. 18, 2028 | Oct. 18, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,972,000 | ||||||
| Investment Owned, at Cost | 4,877,000 | ||||||
| Investment Owned, at Fair Value | $ 5,021,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 14.50% | ||||||
| Investment, Identifier [Axis]: Atlas Parent, LLC Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AtlasParentLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||
| Investment, Acquisition Date | Oct. 24, 2025 | ||||||
| Investment Owned, Balance, Principal Amount | $ 19,000 | ||||||
| Investment Owned, at Cost | 1,682,000 | ||||||
| Investment Owned, at Fair Value | $ 1,853,000 | ||||||
| Percent of net assets | 0.70% | 0.70% | 0.70% | 0.70% | |||
| Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Avision Holdings, LLC [Member] | Avision Holdings, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | |
| Investment Interest Rate | 9.82% | 10.48% | 9.82% | 9.82% | 9.82% | 10.48% | |
| Investment, Acquisition Date | May 31, 2024 | May 31, 2024 | |||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 548,000 | $ 553,000 | |||||
| Investment Owned, at Cost | 544,000 | 545,000 | |||||
| Investment Owned, at Fair Value | $ 546,000 | $ 558,000 | |||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Avision Holdings, LLC [Member] | Avision Holdings, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | |
| Investment Interest Rate | 9.82% | 10.48% | 9.82% | 9.82% | 9.82% | 10.48% | |
| Investment, Acquisition Date | May 31, 2024 | May 31, 2024 | |||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 652,000 | $ 658,000 | |||||
| Investment Owned, at Cost | 647,000 | 648,000 | |||||
| Investment Owned, at Fair Value | $ 650,000 | $ 652,000 | |||||
| Percent of net assets | 0.30% | 0.20% | 0.30% | 0.30% | 0.30% | 0.20% | |
| Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group), Class A LLC Interests | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Avision Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | |||||
| Investment, Acquisition Date | Dec. 15, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 200 | 200 | |||||
| Investment Owned, at Cost | $ 287,000 | ||||||
| Investment Owned, at Fair Value | $ 577,000 | ||||||
| Percent of net assets | 0.20% | 0.20% | |||||
| Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Avision Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||
| Investment, Acquisition Date | Dec. 15, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 299 | 299 | 299 | 299 | |||
| Investment Owned, at Cost | $ 299,000 | ||||||
| Investment Owned, at Fair Value | $ 322,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BBQBuyerLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | |||||
| Spread Above Index | 10.50% | 10.50% | |||||
| Investment Interest Rate | 14.96% | 14.96% | |||||
| Investment, Acquisition Date | Dec. 02, 2021 | ||||||
| Investment Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,654,000 | ||||||
| Investment Owned, at Cost | 2,645,000 | ||||||
| Investment Owned, at Fair Value | $ 2,642,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 2.00% | 2.00% | |||||
| Investment, Interest Rate, Paid in Cash | 12.96% | 12.96% | |||||
| Percent of net assets | 0.90% | 0.90% | |||||
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BBQBuyerLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | |||||
| Spread Above Index | 10.50% | 10.50% | |||||
| Investment Interest Rate | 14.96% | 14.96% | |||||
| Investment, Acquisition Date | Aug. 28, 2020 | ||||||
| Investment Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,013,000 | ||||||
| Investment Owned, at Cost | 12,972,000 | ||||||
| Investment Owned, at Fair Value | $ 12,955,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 2.00% | 2.00% | |||||
| Investment, Interest Rate, Paid in Cash | 12.96% | 12.96% | |||||
| Percent of net assets | 4.50% | 4.50% | |||||
| Investment, Identifier [Axis]: BBQ Buyer, LLC Shares | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BBQBuyerLLCMember | whfcl:BBQBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | whfcl:SharesMember | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | whfcl:SharesMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |
| Investment, Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | |||||
| Investment Owned, Balance, Shares | shares | 1,100 | 1,100 | 1,100 | 1,100 | |||
| Investment Owned, Balance, Principal Amount | $ 1,100,000 | ||||||
| Investment Owned, at Cost | $ 1,100,000 | 1,100,000 | |||||
| Investment Owned, at Fair Value | $ 1,003,000 | $ 907,000 | |||||
| Percent of net assets | 0.40% | 0.30% | 0.40% | 0.40% | 0.40% | 0.30% | |
| Investment, Identifier [Axis]: BL Products Parent, LP Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BLProductsParentLPMember | whfcl:BLProductsParentLPMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | |
| Investment, Acquisition Date | Feb. 01, 2022 | Feb. 01, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 733 | 733 | 733 | 733 | |||
| Investment Owned, Balance, Principal Amount | $ 733,000 | ||||||
| Investment Owned, at Cost | $ 788,000 | 788,000 | |||||
| Investment Owned, at Fair Value | $ 561,000 | $ 1,012,000 | |||||
| Percent of net assets | 0.20% | 0.40% | 0.20% | 0.20% | 0.20% | 0.40% | |
| Investment, Identifier [Axis]: BPII-JL Group Holdings LP (d/b/a Juniper Landscaping Holdings LLC) Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BPII-JLGroupHoldingsLPMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Acquisition Date | Dec. 29, 2021 | ||||||
| Investment Owned, Balance, Principal Amount | $ 90,000 | ||||||
| Investment Owned, at Cost | 942,000 | ||||||
| Investment Owned, at Fair Value | $ 1,400,000 | ||||||
| Percent of net assets | 0.50% | 0.50% | |||||
| Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BPII-JLGroupHoldingsLPMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||
| Investment, Acquisition Date | Dec. 29, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 90 | 90 | 90 | 90 | |||
| Investment Owned, at Cost | $ 942,000 | ||||||
| Investment Owned, at Fair Value | $ 1,645,000 | ||||||
| Percent of net assets | 0.60% | 0.60% | 0.60% | 0.60% | |||
| Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Busa Acquisition Co BankCard Usa Merchant Services Inc [Member] | Busa Acquisition Co BankCard Usa Merchant Services Inc [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.34% | 10.81% | 10.34% | 10.34% | 10.34% | 10.81% | |
| Investment, Acquisition Date | Apr. 04, 2024 | Apr. 04, 2024 | |||||
| Investment Maturity Date | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 276,000 | $ 459,000 | |||||
| Investment Owned, at Cost | 270,000 | 447,000 | |||||
| Investment Owned, at Fair Value | $ 283,000 | $ 461,000 | |||||
| Percent of net assets | 0.10% | 0.20% | 0.10% | 0.10% | 0.10% | 0.20% | |
| Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Busa Acquisition Co BankCard Usa Merchant Services Inc [Member] | Busa Acquisition Co BankCard Usa Merchant Services Inc [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.29% | 10.77% | 10.29% | 10.29% | 10.29% | 10.77% | |
| Investment, Acquisition Date | Apr. 04, 2024 | Apr. 04, 2024 | |||||
| Investment Maturity Date | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | Mar. 30, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 7,374,000 | $ 7,779,000 | |||||
| Investment Owned, at Cost | 7,231,000 | 7,580,000 | |||||
| Investment Owned, at Fair Value | $ 7,331,000 | $ 7,691,000 | |||||
| Percent of net assets | 2.80% | 2.70% | 2.80% | 2.80% | 2.80% | 2.70% | |
| Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BannerAcquisitionHoldingsLLCMember | whfcl:BannerAcquisitionHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.07% | 10.59% | 10.07% | 10.07% | 10.07% | 10.59% | |
| Investment, Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | |||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,873,000 | $ 1,502,000 | |||||
| Investment Owned, at Cost | 1,845,000 | 1,472,000 | |||||
| Investment Owned, at Fair Value | $ 1,766,000 | $ 1,477,000 | |||||
| Fair Value As A Percentage of Member's Equity | 5.40% | 4.30% | |||||
| Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BannerAcquisitionHoldingsLLCMember | whfcl:BannerAcquisitionHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.07% | 10.61% | 10.07% | 10.07% | 10.07% | 10.61% | |
| Investment, Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | |||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 168,000 | $ 420,000 | |||||
| Investment Owned, at Cost | 166,000 | 412,000 | |||||
| Investment Owned, at Fair Value | $ 118,000 | $ 415,000 | |||||
| Fair Value As A Percentage of Member's Equity | 0.40% | 1.20% | |||||
| Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BannerAcquisitionHoldingsLLCMember | whfcl:BannerAcquisitionHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.07% | 10.61% | 10.07% | 10.07% | 10.07% | 10.61% | |
| Investment, Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | |||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 2,956,000 | $ 3,033,000 | |||||
| Investment Owned, at Cost | 2,912,000 | 2,974,000 | |||||
| Investment Owned, at Fair Value | $ 2,787,000 | $ 2,981,000 | |||||
| Fair Value As A Percentage of Member's Equity | 8.40% | 8.60% | |||||
| Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.92% | 5.92% | 5.92% | 5.92% | |||
| Investment Interest Rate | 10.02% | 10.02% | 10.02% | 10.02% | |||
| Investment, Acquisition Date | Jan. 10, 2024 | ||||||
| Investment Maturity Date | Nov. 21, 2028 | Nov. 21, 2028 | Nov. 21, 2028 | Nov. 21, 2028 | |||
| Investment Owned, Balance, Principal Amount | $ 373,000 | ||||||
| Investment Owned, at Cost | 367,000 | ||||||
| Investment Owned, at Fair Value | $ 366,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.10% | ||||||
| Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.82% | 9.82% | 9.82% | 9.82% | |||
| Investment, Acquisition Date | Jan. 10, 2024 | ||||||
| Investment Maturity Date | Nov. 21, 2029 | Nov. 21, 2029 | Nov. 21, 2029 | Nov. 21, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 3,580,000 | ||||||
| Investment Owned, at Cost | 3,523,000 | ||||||
| Investment Owned, at Fair Value | $ 3,493,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 10.60% | ||||||
| Investment, Identifier [Axis]: Barrett Purchaser LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 10.51% | 10.51% | |||||
| Investment, Acquisition Date | Jan. 10, 2024 | ||||||
| Investment Maturity Date | Nov. 21, 2029 | Nov. 21, 2029 | |||||
| Investment Owned, at Fair Value | $ (2,000) | ||||||
| Investment, Identifier [Axis]: Barrett Purchaser LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 5.00% | 5.00% | |||||
| Investment Interest Rate | 12.50% | 12.50% | |||||
| Investment, Acquisition Date | Jan. 10, 2024 | ||||||
| Investment Maturity Date | Nov. 21, 2028 | Nov. 21, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 60,000 | ||||||
| Investment Owned, at Cost | 58,000 | ||||||
| Investment Owned, at Fair Value | $ 63,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.20% | ||||||
| Investment, Identifier [Axis]: Barrett Purchaser LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 10.51% | 10.51% | |||||
| Investment, Acquisition Date | Jan. 10, 2024 | ||||||
| Investment Maturity Date | Nov. 21, 2029 | Nov. 21, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,617,000 | ||||||
| Investment Owned, at Cost | 3,543,000 | ||||||
| Investment Owned, at Fair Value | $ 3,574,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 10.30% | ||||||
| Investment, Identifier [Axis]: Basel U.S. Acquisition Co., Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BaselU.s.AcquisitionCo.Inc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Aerospace & Defense | Aerospace & Defense | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 9.94% | 9.94% | |||||
| Investment, Acquisition Date | Sep. 13, 2024 | ||||||
| Investment Maturity Date | Dec. 05, 2028 | Dec. 05, 2028 | |||||
| Investment Owned, at Fair Value | $ 7,000 | ||||||
| Investment, Identifier [Axis]: Basel U.S. Acquisition Co., Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BaselU.s.AcquisitionCo.Inc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Aerospace & Defense | Aerospace & Defense | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 9.94% | 9.94% | |||||
| Investment, Acquisition Date | Sep. 13, 2024 | ||||||
| Investment Maturity Date | Dec. 05, 2028 | Dec. 05, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,681,000 | ||||||
| Investment Owned, at Cost | 3,633,000 | ||||||
| Investment Owned, at Fair Value | $ 3,675,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 10.60% | ||||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BridgepointHealthcareLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.46% | 12.46% | |||||
| Investment, Acquisition Date | Oct. 05, 2021 | ||||||
| Investment Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 238,000 | ||||||
| Investment Owned, at Cost | 237,000 | ||||||
| Investment Owned, at Fair Value | $ 231,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BridgepointHealthcareLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.46% | 12.46% | |||||
| Investment, Acquisition Date | Oct. 05, 2021 | ||||||
| Investment Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,517,000 | ||||||
| Investment Owned, at Cost | 8,457,000 | ||||||
| Investment Owned, at Fair Value | $ 8,429,000 | ||||||
| Percent of net assets | 2.90% | 2.90% | |||||
| Investment, Identifier [Axis]: Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BuckeyeAcquirorLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Dec. 17, 2025 | ||||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |||
| Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BuckeyeAcquirorLlcMember | whfcl:BuckeyeAcquirorLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.44% | 5.00% | 6.44% | 6.44% | 6.44% | 5.00% | |
| Investment Interest Rate | 10.26% | 8.45% | 10.26% | 10.26% | 10.26% | 8.45% | |
| Investment, Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 2,319,000 | $ 2,168,000 | |||||
| Investment Owned, at Cost | 2,281,000 | 2,120,000 | |||||
| Investment Owned, at Fair Value | $ 2,323,000 | $ 2,183,000 | |||||
| Fair Value As A Percentage of Member's Equity | 7.10% | 6.30% | |||||
| Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BuckeyeAcquirorLlcMember | whfcl:BuckeyeAcquirorLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.32% | 10.96% | 10.32% | 10.32% | 10.32% | 10.96% | |
| Investment, Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 370,000 | $ 234,000 | |||||
| Investment Owned, at Cost | 365,000 | 230,000 | |||||
| Investment Owned, at Fair Value | $ 379,000 | $ 248,000 | |||||
| Fair Value As A Percentage of Member's Equity | 1.20% | 0.70% | |||||
| Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BuckeyeAcquirorLlcMember | whfcl:BuckeyeAcquirorLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.42% | 6.42% | 6.42% | 6.42% | 6.42% | 6.42% | |
| Investment Interest Rate | 10.23% | 10.88% | 10.23% | 10.23% | 10.23% | 10.88% | |
| Investment, Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 6,834,000 | $ 6,904,000 | |||||
| Investment Owned, at Cost | 6,733,000 | 6,774,000 | |||||
| Investment Owned, at Fair Value | $ 6,834,000 | $ 6,952,000 | |||||
| Fair Value As A Percentage of Member's Equity | 20.80% | 20.10% | |||||
| Investment, Identifier [Axis]: CX Holdco LLC Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CXHoldcoLLCMember | whfcl:CXHoldcoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Acquisition Date | May 04, 2021 | May 04, 2021 | |||||
| Investment Owned, Balance, Shares | shares | 1,068 | 1,068 | 1,068 | 1,068 | |||
| Investment Owned, Balance, Principal Amount | $ 1,068,000 | ||||||
| Investment Owned, at Cost | $ 1,116,000 | 1,116,000 | |||||
| Investment Owned, at Fair Value | $ 218,000 | $ 2,232,000 | |||||
| Percent of net assets | 0.10% | 0.80% | 0.10% | 0.10% | 0.10% | 0.80% | |
| Investment, Identifier [Axis]: Camarillo Fitness Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Camarillo Fitness Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | |||
| Investment, Acquisition Date | Jan. 10, 2025 | ||||||
| Investment Maturity Date | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 1,218,000 | ||||||
| Investment Owned, at Cost | 1,135,000 | ||||||
| Investment Owned, at Fair Value | $ 196,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 12.83% | 12.83% | 12.83% | 12.83% | |||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: Camarillo Fitness Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Camarillo Fitness Holdings, LLC [Member] | Camarillo Fitness Holdings, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | |
| Investment, Acquisition Date | Sep. 25, 2024 | Sep. 25, 2024 | |||||
| Investment Maturity Date | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 13,370,000 | $ 11,738,000 | |||||
| Investment Owned, at Cost | 10,231,000 | 10,269,000 | |||||
| Investment Owned, at Fair Value | $ 5,354,000 | $ 10,492,000 | |||||
| Investment, Interest Rate, Paid in Kind | 12.32% | 12.98% | 12.32% | 12.32% | 12.32% | 12.98% | |
| Percent of net assets | 2.10% | 3.70% | 2.10% | 2.10% | 2.10% | 3.70% | |
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CampFacilityServicesHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Nov. 16, 2021 | ||||||
| Investment Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,424,000 | ||||||
| Investment Owned, at Cost | 10,325,000 | ||||||
| Investment Owned, at Fair Value | $ 9,905,000 | ||||||
| Percent of net assets | 3.50% | 3.50% | |||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CampFacilityServicesHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Nov. 16, 2021 | ||||||
| Investment Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 10,294,000 | ||||||
| Investment Owned, at Cost | 10,230,000 | ||||||
| Investment Owned, at Fair Value | $ 9,781,000 | ||||||
| Percent of net assets | 3.80% | 3.80% | 3.80% | 3.80% | |||
| Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CampFacilityServicesParentLLCMember | whfcl:CampFacilityServicesParentLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||
| Investment Owned, Balance, Shares | shares | 15 | 15 | 15 | 15 | |||
| Investment Owned, Balance, Principal Amount | $ 15,000 | ||||||
| Investment Owned, at Cost | $ 840,000 | 840,000 | |||||
| Investment Owned, at Fair Value | $ 31,000 | $ 162,000 | |||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CennoxHoldingsLimitedMember | whfcl:CennoxHoldingsLimitedMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 5.50% | 6.75% | 6.75% | 6.75% | 5.50% | |
| Investment Interest Rate | 10.59% | 10.40% | 10.59% | 10.59% | 10.59% | 10.40% | |
| Investment, Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | |||||
| Investment Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Investment Owned, Balance, Principal Amount | £ | £ 158 | ||||||
| Investment Owned, at Cost | $ 206,000 | ||||||
| Investment Owned, at Fair Value | $ 205,000 | $ 2,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||
| Investment, Interest Rate, Paid in Cash | 10.34% | 10.34% | 10.34% | 10.34% | |||
| Fair Value As A Percentage of Member's Equity | 0.60% | ||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CennoxHoldingsLimitedMember | whfcl:CennoxHoldingsLimitedMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | Sterling Overnight Index Average [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.65% | 5.50% | 6.65% | 6.65% | 6.65% | 5.50% | |
| Investment Interest Rate | 10.59% | 10.40% | 10.59% | 10.59% | 10.59% | 10.40% | |
| Investment, Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | |||||
| Investment Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 513,000 | £ 553 | |||||
| Investment Owned, at Cost | $ 721,000 | 665,000 | |||||
| Investment Owned, at Fair Value | $ 717,000 | $ 643,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||
| Investment, Interest Rate, Paid in Cash | 10.34% | 10.34% | 10.34% | 10.34% | |||
| Fair Value As A Percentage of Member's Equity | 2.20% | 1.90% | |||||
| Investment, Identifier [Axis]: Cennox, Inc, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CennoxInc.Member | whfcl:CennoxInc.Member | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 5.50% | 6.75% | 6.75% | 6.75% | 5.50% | |
| Investment Interest Rate | 10.60% | 10.25% | 10.60% | 10.60% | 10.60% | 10.25% | |
| Investment, Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | |||||
| Investment Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 134,000 | $ 29,000 | |||||
| Investment Owned, at Cost | 133,000 | 29,000 | |||||
| Investment Owned, at Fair Value | $ 129,000 | $ 30,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||
| Investment, Interest Rate, Paid in Cash | 10.35% | 10.35% | 10.35% | 10.35% | |||
| Fair Value As A Percentage of Member's Equity | 0.40% | 0.10% | |||||
| Investment, Identifier [Axis]: Cennox, Inc, First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CennoxInc.Member | whfcl:CennoxInc.Member | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate Six Month Term [Member] | whfcl:EuroInterbankOfferedRateMember | Euro Interbank Offered Rate Six Month Term [Member] | Euro Interbank Offered Rate Six Month Term [Member] | Euro Interbank Offered Rate Six Month Term [Member] | whfcl:EuroInterbankOfferedRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 5.75% | 7.00% | 7.00% | 7.00% | 5.75% | |
| Investment Interest Rate | 9.07% | 9.14% | 9.07% | 9.07% | 9.07% | 9.14% | |
| Investment, Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | |||||
| Investment Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 594,000 | € 616 | |||||
| Investment Owned, at Cost | $ 676,000 | 649,000 | |||||
| Investment Owned, at Fair Value | $ 694,000 | $ 611,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||
| Investment, Interest Rate, Paid in Cash | 8.82% | 8.82% | 8.82% | 8.82% | |||
| Fair Value As A Percentage of Member's Equity | 2.10% | 1.80% | |||||
| Investment, Identifier [Axis]: Cennox, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CennoxInc.Member | whfcl:CennoxInc.Member | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 5.50% | 6.75% | 6.75% | 6.75% | 5.50% | |
| Investment Interest Rate | 10.89% | 10.34% | 10.89% | 10.89% | 10.89% | 10.34% | |
| Investment, Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | |||||
| Investment Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 3,508,000 | $ 3,350,000 | |||||
| Investment Owned, at Cost | 3,485,000 | 3,319,000 | |||||
| Investment Owned, at Fair Value | $ 3,369,000 | $ 3,344,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||
| Investment, Interest Rate, Paid in Cash | 10.64% | 10.64% | 10.64% | 10.64% | |||
| Fair Value As A Percentage of Member's Equity | 10.20% | 9.70% | |||||
| Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) Second Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ChaseProductsCoMember | whfcl:ChaseProductsCoMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.17% | 9.17% | 9.17% | 9.17% | |||
| Investment, Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | |||||
| Investment Maturity Date | Mar. 16, 2028 | Mar. 16, 2028 | Mar. 16, 2028 | Mar. 16, 2028 | Mar. 16, 2028 | Mar. 16, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 3,404,000 | $ 3,342,000 | |||||
| Investment Owned, at Cost | 3,404,000 | 3,342,000 | |||||
| Investment Owned, at Fair Value | $ 3,404,000 | $ 3,342,000 | 2,793,000 | ||||
| Investment, Interest Rate, Paid in Kind | 0.18% | 12.00% | 0.18% | 0.18% | 0.18% | 12.00% | |
| Investment, Interest Rate, Paid in Cash | 8.99% | 8.99% | 8.99% | 8.99% | |||
| Percent of net assets | 1.30% | 1.20% | 1.30% | 1.30% | 1.30% | 1.20% | |
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClaridgeProductsandEquipmentLLCMember | whfcl:ClaridgeProductsandEquipmentLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.38% | 8.31% | 8.38% | 8.38% | 8.38% | 8.31% | |
| Investment Interest Rate | 13.54% | 14.13% | 13.54% | 13.54% | 13.54% | 14.13% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||
| Investment Maturity Date | Mar. 31, 2027 | Dec. 30, 2025 | Mar. 31, 2027 | Mar. 31, 2027 | Mar. 31, 2027 | Dec. 30, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 561,000 | $ 632,000 | |||||
| Investment Owned, at Cost | 561,000 | 630,000 | |||||
| Investment Owned, at Fair Value | $ 498,000 | $ 555,000 | |||||
| Investment, Interest Rate, Paid in Kind | 4.19% | 2.25% | 4.19% | 4.19% | 4.19% | 2.25% | |
| Investment, Interest Rate, Paid in Cash | 9.11% | 11.88% | 9.11% | 9.11% | 9.11% | 11.88% | |
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClaridgeProductsandEquipmentLLCMember | whfcl:CleanChoiceEnergyIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.75% | 8.75% | 8.75% | 8.75% | 8.75% | 8.75% | |
| Investment Interest Rate | 12.57% | 13.21% | 12.57% | 12.57% | 12.57% | 13.21% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||
| Investment Maturity Date | Mar. 31, 2027 | Dec. 30, 2025 | Mar. 31, 2027 | Mar. 31, 2027 | Mar. 31, 2027 | Dec. 30, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 5,124,000 | $ 5,711,000 | |||||
| Investment Owned, at Cost | 5,123,000 | 5,690,000 | |||||
| Investment Owned, at Fair Value | $ 4,661,000 | $ 5,085,000 | |||||
| Investment, Interest Rate, Paid in Kind | 4.38% | 2.25% | 4.38% | 4.38% | 4.38% | 2.25% | |
| Investment, Interest Rate, Paid in Cash | 8.19% | 10.96% | 8.19% | 8.19% | 8.19% | 10.96% | |
| Percent of net assets | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | |
| Investment, Identifier [Axis]: Clark Restaurant Service, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClarkRestaurantServiceLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Food Distributors | Food Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.11% | 10.11% | |||||
| Investment, Acquisition Date | Jun. 14, 2024 | ||||||
| Investment Maturity Date | May 10, 2029 | May 10, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,006,000 | ||||||
| Investment Owned, at Cost | 4,919,000 | ||||||
| Investment Owned, at Fair Value | $ 4,993,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 14.40% | ||||||
| Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClarkRestaurantServiceLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Food Distributors | Food Distributors | Food Distributors | Food Distributors | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.47% | 9.47% | 9.47% | 9.47% | |||
| Investment, Acquisition Date | Jun. 14, 2024 | ||||||
| Investment Maturity Date | May 10, 2029 | May 10, 2029 | May 10, 2029 | May 10, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 4,956,000 | ||||||
| Investment Owned, at Cost | 4,889,000 | ||||||
| Investment Owned, at Fair Value | $ 4,928,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 15.00% | ||||||
| Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CleanChoiceEnergyIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electric Utilities [Member] | Electric Utilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Spread Above Index | 7.59% | 7.59% | |||||
| Investment Interest Rate | 12.39% | 12.39% | |||||
| Investment, Acquisition Date | Oct. 12, 2021 | ||||||
| Investment Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 15,955,000 | ||||||
| Investment Owned, at Cost | 15,802,000 | ||||||
| Investment Owned, at Fair Value | $ 16,032,000 | ||||||
| Percent of net assets | 5.60% | 5.60% | |||||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CoastalTelevisionBroadcastingGroupLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting [Member] | Broadcasting [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Dec. 30, 2021 | ||||||
| Investment Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | |||||
| Investment Owned, at Fair Value | $ 1,000 | ||||||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CoastalTelevisionBroadcastingGroupLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting [Member] | Broadcasting [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Dec. 30, 2021 | ||||||
| Investment Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,879,000 | ||||||
| Investment Owned, at Cost | 7,808,000 | ||||||
| Investment Owned, at Fair Value | $ 7,832,000 | ||||||
| Percent of net assets | 2.70% | 2.70% | |||||
| Investment, Identifier [Axis]: Colonnade Parent, Inc. (d/b/a Naviga Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ColonnadeParentIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Investment Interest Rate | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Investment, Acquisition Date | Jun. 14, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |||
| Investment Owned, Balance, Principal Amount | $ 301,000 | ||||||
| Investment Owned, at Cost | 287,000 | ||||||
| Investment Owned, at Fair Value | $ 158,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: Colonnade Parent, Inc. (d/b/a Naviga Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ColonnadeParentIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Investment Interest Rate | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Investment, Acquisition Date | Jun. 14, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |||
| Investment Owned, Balance, Principal Amount | $ 3,667,000 | ||||||
| Investment Owned, at Cost | 2,988,000 | ||||||
| Investment Owned, at Fair Value | $ 1,925,000 | ||||||
| Percent of net assets | 0.70% | 0.70% | 0.70% | 0.70% | |||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:DrewFoamCompaniesIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 10.48% | 10.48% | |||||
| Investment, Acquisition Date | Nov. 09, 2020 | ||||||
| Investment Maturity Date | Dec. 07, 2026 | Dec. 07, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,501,000 | ||||||
| Investment Owned, at Cost | 13,445,000 | ||||||
| Investment Owned, at Fair Value | $ 13,437,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 38.80% | ||||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:DrewFoamCompaniesIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.82% | 9.82% | 9.82% | 9.82% | |||
| Investment, Acquisition Date | Nov. 09, 2020 | ||||||
| Investment Maturity Date | Dec. 07, 2026 | Dec. 07, 2026 | Dec. 07, 2026 | Dec. 07, 2026 | |||
| Investment Owned, Balance, Principal Amount | $ 13,358,000 | ||||||
| Investment Owned, at Cost | 13,331,000 | ||||||
| Investment Owned, at Fair Value | $ 13,314,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 40.50% | ||||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:E-PhoenixAcquisitionCo.Inc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 9.98% | 9.98% | |||||
| Investment, Acquisition Date | Jul. 15, 2021 | ||||||
| Investment Maturity Date | Jun. 23, 2027 | Jun. 23, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,342,000 | ||||||
| Investment Owned, at Cost | 8,299,000 | ||||||
| Investment Owned, at Fair Value | $ 8,342,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 24.10% | ||||||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Nov. 20, 2025 | ||||||
| Investment Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Nov. 20, 2025 | ||||||
| Investment Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Nov. 20, 2025 | ||||||
| Investment Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 5,543,000 | ||||||
| Investment Owned, at Cost | 5,488,000 | ||||||
| Investment Owned, at Fair Value | $ 5,488,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 16.70% | ||||||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC (d/b/a EducationDynamics, LLC) Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EddyAcquisitionsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | |||||
| Investment, Acquisition Date | Sep. 15, 2021 | ||||||
| Investment Owned, Balance, Principal Amount | $ 167,000 | ||||||
| Investment Owned, at Cost | $ 167,000 | ||||||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EddyAcquisitionsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |||
| Investment, Acquisition Date | Sep. 15, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 167 | 167 | 167 | 167 | |||
| Investment Owned, at Cost | $ 167,000 | ||||||
| Investment, Identifier [Axis]: Education Dynamics, LLC Senior Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EducationDynamicsLLCMember | whfcl:EducationDynamicsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||
| Investment Owned, Balance, Shares | shares | 167 | 167 | 167 | 167 | |||
| Investment Owned, Balance, Principal Amount | $ 167,000 | ||||||
| Investment Owned, at Cost | $ 167,000 | 167,000 | |||||
| Investment Owned, at Fair Value | $ 100,000 | ||||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EducationDynamicsLLCMember | whfcl:EducationDynamicsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | whfcl:SecuredOvernightFinancingRateMember | Prime Rate [Member] | Prime Rate [Member] | Prime Rate [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 6.50% | 5.50% | 5.50% | 5.50% | 6.50% | |
| Investment Interest Rate | 12.25% | 10.96% | 12.25% | 12.25% | 12.25% | 10.96% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||
| Investment Maturity Date | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 360,000 | ||||||
| Investment Owned, at Cost | 358,000 | ||||||
| Investment Owned, at Fair Value | $ 320,000 | $ (51,000) | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EducationDynamicsLLCMember | whfcl:EducationDynamicsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.32% | 10.96% | 10.32% | 10.32% | 10.32% | 10.96% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||
| Investment Maturity Date | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 12,592,000 | $ 13,089,000 | |||||
| Investment Owned, at Cost | 12,532,000 | 12,989,000 | |||||
| Investment Owned, at Fair Value | $ 12,137,000 | $ 12,449,000 | |||||
| Percent of net assets | 4.70% | 4.30% | 4.70% | 4.70% | 4.70% | 4.30% | |
| Investment, Identifier [Axis]: Event Services America, Inc. (d/b/a Contemporary Services Corporation) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EventServicesAmericaIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Security & Alarm Services [Member] | Security & Alarm Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.11% | 11.11% | |||||
| Investment, Acquisition Date | Jan. 31, 2024 | ||||||
| Investment Maturity Date | Jan. 31, 2029 | Jan. 31, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,000,000 | ||||||
| Investment Owned, at Cost | 6,857,000 | ||||||
| Investment Owned, at Fair Value | $ 7,070,000 | ||||||
| Percent of net assets | 2.50% | 2.50% | |||||
| Investment, Identifier [Axis]: FGI Acquisition Corp. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:FgiAcquisitionCorpMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.98% | 10.98% | |||||
| Investment, Acquisition Date | Oct. 28, 2019 | ||||||
| Investment Maturity Date | Oct. 29, 2026 | Oct. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 16,026,000 | ||||||
| Investment Owned, at Cost | 15,765,000 | ||||||
| Investment Owned, at Fair Value | $ 16,026,000 | ||||||
| Percent of net assets | 5.60% | 5.60% | |||||
| Investment, Identifier [Axis]: FloWorks International LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:FloworksInternationalLlcMember | whfcl:FloworksInternationalLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | Distributors | Distributors | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 4.75% | 5.75% | 4.75% | 4.75% | 4.75% | 5.75% | |
| Investment Interest Rate | 8.57% | 10.40% | 8.57% | 8.57% | 8.57% | 10.40% | |
| Investment, Acquisition Date | Dec. 12, 2024 | Dec. 12, 2024 | |||||
| Investment Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |
| Investment Owned, Balance, Principal Amount | $ 667,000 | ||||||
| Investment Owned, at Cost | 661,000 | ||||||
| Investment Owned, at Fair Value | $ 663,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 2.00% | ||||||
| Investment, Identifier [Axis]: FloWorks International LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:FloworksInternationalLlcMember | whfcl:FloworksInternationalLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | Distributors | Distributors | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | 4.75% | 4.75% | |
| Investment Interest Rate | 8.57% | 9.27% | 8.57% | 8.57% | 8.57% | 9.27% | |
| Investment, Acquisition Date | Dec. 12, 2024 | Dec. 12, 2024 | |||||
| Investment Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |
| Investment Owned, Balance, Principal Amount | $ 5,293,000 | $ 5,333,000 | |||||
| Investment Owned, at Cost | 5,248,000 | 5,280,000 | |||||
| Investment Owned, at Fair Value | $ 5,262,000 | $ 5,281,000 | |||||
| Fair Value As A Percentage of Member's Equity | 16.00% | 15.30% | |||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:FoodservicesBrandGroupLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.62% | 12.62% | |||||
| Investment, Acquisition Date | Nov. 22, 2022 | ||||||
| Investment Maturity Date | Dec. 09, 2025 | Dec. 09, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 357,000 | ||||||
| Investment Owned, at Cost | 357,000 | ||||||
| Investment Owned, at Fair Value | $ 321,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ForwardSolutionsLlcMember | whfcl:ForwardSolutionsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 10.57% | 11.23% | 10.57% | 10.57% | 10.57% | 11.23% | |
| Investment, Acquisition Date | Mar. 11, 2022 | Mar. 11, 2022 | |||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 2,993,000 | $ 3,023,000 | |||||
| Investment Owned, at Cost | 2,981,000 | 3,000,000 | |||||
| Investment Owned, at Fair Value | $ 2,993,000 | $ 3,023,000 | |||||
| Fair Value As A Percentage of Member's Equity | 9.10% | 8.70% | |||||
| Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ForwardSolutionsLlcMember | whfcl:ForwardSolutionsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 10.69% | 11.23% | 10.69% | 10.69% | 10.69% | 11.23% | |
| Investment, Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | |||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 619,000 | ||||||
| Investment Owned, at Cost | 617,000 | ||||||
| Investment Owned, at Fair Value | $ 619,000 | $ 5,000 | |||||
| Fair Value As A Percentage of Member's Equity | 1.90% | ||||||
| Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ForwardSolutionsLlcMember | whfcl:ForwardSolutionsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 10.57% | 11.23% | 10.57% | 10.57% | 10.57% | 11.23% | |
| Investment, Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | |||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 8,914,000 | $ 9,007,000 | |||||
| Investment Owned, at Cost | 8,880,000 | 8,937,000 | |||||
| Investment Owned, at Fair Value | $ 8,914,000 | $ 9,007,000 | |||||
| Fair Value As A Percentage of Member's Equity | 27.10% | 26.10% | |||||
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 7.00% | 7.00% | 7.00% | 7.00% | |||
| Investment Interest Rate | 10.67% | 10.67% | 10.67% | 10.67% | |||
| Investment, Acquisition Date | Jul. 31, 2025 | ||||||
| Investment Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 250,000 | ||||||
| Investment Owned, at Cost | 248,000 | ||||||
| Investment Owned, at Fair Value | $ 272,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 7.00% | 7.00% | 7.00% | 7.00% | |||
| Investment Interest Rate | 10.67% | 10.67% | 10.67% | 10.67% | |||
| Investment, Acquisition Date | Jul. 31, 2025 | ||||||
| Investment Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |||
| Investment Owned, at Fair Value | $ 8,000 | ||||||
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 7.00% | 7.00% | 7.00% | 7.00% | |||
| Investment Interest Rate | 10.67% | 10.67% | 10.67% | 10.67% | |||
| Investment, Acquisition Date | Jul. 31, 2025 | ||||||
| Investment Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 4,364,000 | ||||||
| Investment Owned, at Cost | 4,286,000 | ||||||
| Investment Owned, at Fair Value | $ 4,343,000 | ||||||
| Percent of net assets | 1.70% | 1.70% | 1.70% | 1.70% | |||
| Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:FuturePaymentTechnologiesLPMember | whfcl:FuturePaymentTechnologiesLPMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | |
| Investment Interest Rate | 12.22% | 12.90% | 12.22% | 12.22% | 12.22% | 12.90% | |
| Investment, Acquisition Date | Dec. 23, 2016 | Dec. 23, 2016 | |||||
| Investment Maturity Date | Dec. 07, 2026 | Dec. 05, 2025 | Dec. 07, 2026 | Dec. 07, 2026 | Dec. 07, 2026 | Dec. 05, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 19,175,000 | $ 20,420,000 | |||||
| Investment Owned, at Cost | 19,160,000 | 20,382,000 | |||||
| Investment Owned, at Fair Value | $ 19,175,000 | $ 20,420,000 | |||||
| Percent of net assets | 7.40% | 7.10% | 7.40% | 7.40% | 7.40% | 7.10% | |
| Investment, Identifier [Axis]: G-2 Lather Acquisition Corp. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:G2LatherAcquisitionCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.72% | 8.72% | 8.72% | 8.72% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, at Fair Value | $ 10,000 | ||||||
| Investment, Identifier [Axis]: G-2 Lather Acquisition Corp. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:G2LatherAcquisitionCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.72% | 8.72% | 8.72% | 8.72% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, at Fair Value | $ 4,000 | ||||||
| Investment, Identifier [Axis]: G-2 Lather Acquisition Corp. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:G2LatherAcquisitionCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.72% | 8.72% | 8.72% | 8.72% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 3,900,000 | ||||||
| Investment Owned, at Cost | 3,850,000 | ||||||
| Investment Owned, at Fair Value | $ 3,873,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 11.70% | ||||||
| Investment, Identifier [Axis]: GTT Communications Global, LLC (d/b/a GTT Communications, Inc.), First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GttCommunicationsGlobalLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.73% | 9.73% | 9.73% | 9.73% | |||
| Investment, Acquisition Date | Apr. 15, 2025 | ||||||
| Investment Maturity Date | Apr. 15, 2031 | Apr. 15, 2031 | Apr. 15, 2031 | Apr. 15, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 15,283,000 | ||||||
| Investment Owned, at Cost | 15,014,000 | ||||||
| Investment Owned, at Fair Value | $ 15,129,000 | ||||||
| Percent of net assets | 5.80% | 5.80% | 5.80% | 5.80% | |||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd.First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GeoLogicSystemsLtdMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 9.49% | 9.49% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||
| Investment Maturity Date | Dec. 21, 2026 | Dec. 21, 2026 | |||||
| Investment Owned, at Fair Value | $ 2,000 | ||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd.First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GeoLogicSystemsLtdMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 9.49% | 9.49% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||
| Investment Maturity Date | Dec. 21, 2026 | Dec. 21, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 18,415,000 | ||||||
| Investment Owned, at Cost | 14,234,000 | ||||||
| Investment Owned, at Fair Value | $ 12,883,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 37.20% | ||||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GulfWindsInternationalAcquisitionLlcMember | whfcl:GulfWindsInternationalAcquisitionLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 7.50% | 7.00% | 7.00% | 7.00% | 7.50% | |
| Investment Interest Rate | 10.72% | 11.95% | 10.72% | 10.72% | 10.72% | 11.95% | |
| Investment, Acquisition Date | Dec. 16, 2022 | Dec. 16, 2022 | |||||
| Investment Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 605,000 | $ 453,000 | |||||
| Investment Owned, at Cost | 596,000 | 444,000 | |||||
| Investment Owned, at Fair Value | $ 584,000 | $ 447,000 | |||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GulfWindsInternationalAcquisitionLlcMember | whfcl:GulfWindsInternationalAcquisitionLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 7.60% | 7.00% | 7.00% | 7.00% | 7.60% | |
| Investment Interest Rate | 10.72% | 11.96% | 10.72% | 10.72% | 10.72% | 11.96% | |
| Investment, Acquisition Date | Dec. 16, 2022 | Dec. 16, 2022 | |||||
| Investment Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 8,956,000 | $ 8,994,000 | |||||
| Investment Owned, at Cost | 8,820,000 | 8,811,000 | |||||
| Investment Owned, at Fair Value | $ 8,697,000 | $ 8,857,000 | |||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Investment, Interest Rate, Paid in Cash | 9.72% | 9.72% | 9.72% | 9.72% | |||
| Percent of net assets | 3.30% | 3.10% | 3.30% | 3.30% | 3.30% | 3.10% | |
| Investment, Identifier [Axis]: H I G Camarillo, LP, Limited Partners Interests | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HIGCamarilloLpMember | whfcl:HIGCamarilloLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Sep. 25, 2024 | Sep. 25, 2024 | |||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | whfcl:HRGManagementLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.22% | 6.97% | 6.22% | 6.22% | 6.22% | 6.97% | |
| Investment Interest Rate | 10.55% | 11.29% | 10.55% | 10.55% | 10.55% | 11.29% | |
| Investment, Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | |||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 1,154,000 | $ 1,395,000 | |||||
| Investment Owned, at Cost | 1,150,000 | 1,384,000 | |||||
| Investment Owned, at Fair Value | $ 1,154,000 | $ 1,354,000 | |||||
| Fair Value As A Percentage of Member's Equity | 3.50% | 3.90% | |||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | whfcl:HRGManagementLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.27% | 11.02% | 10.27% | 10.27% | 10.27% | 11.02% | |
| Investment, Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | |||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 700,000 | $ 483,000 | |||||
| Investment Owned, at Cost | 698,000 | 480,000 | |||||
| Investment Owned, at Fair Value | $ 701,000 | $ 455,000 | |||||
| Fair Value As A Percentage of Member's Equity | 2.10% | 1.30% | |||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | whfcl:HRGManagementLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.27% | 11.02% | 10.27% | 10.27% | 10.27% | 11.02% | |
| Investment, Acquisition Date | Dec. 28, 2021 | Dec. 28, 2021 | |||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 4,602,000 | $ 5,563,000 | |||||
| Investment Owned, at Cost | 4,588,000 | 5,523,000 | |||||
| Investment Owned, at Fair Value | $ 4,602,000 | $ 5,395,000 | |||||
| Fair Value As A Percentage of Member's Equity | 14.00% | 15.60% | |||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ITSBuyerIncMember | whfcl:ITSBuyerIncMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 5.50% | 6.00% | 6.00% | 6.00% | 5.50% | |
| Investment Interest Rate | 9.83% | 10.35% | 9.83% | 9.83% | 9.83% | 10.35% | |
| Investment, Acquisition Date | Feb. 17, 2022 | Feb. 17, 2022 | |||||
| Investment Maturity Date | Jun. 14, 2027 | Jun. 15, 2026 | Jun. 14, 2027 | Jun. 14, 2027 | Jun. 14, 2027 | Jun. 15, 2026 | |
| Investment Owned, at Fair Value | $ 2,000 | $ 4,000 | |||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ITSBuyerIncMember | whfcl:ITSBuyerIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 5.50% | 6.00% | 6.00% | 6.00% | 5.50% | |
| Investment Interest Rate | 9.83% | 10.35% | 9.83% | 9.83% | 9.83% | 10.35% | |
| Investment, Acquisition Date | Feb. 17, 2022 | Feb. 17, 2022 | |||||
| Investment Maturity Date | Jun. 14, 2027 | Jun. 15, 2026 | Jun. 14, 2027 | Jun. 14, 2027 | Jun. 14, 2027 | Jun. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 3,271,000 | $ 3,307,000 | |||||
| Investment Owned, at Cost | 3,262,000 | 3,286,000 | |||||
| Investment Owned, at Fair Value | $ 3,271,000 | $ 3,307,000 | |||||
| Fair Value As A Percentage of Member's Equity | 10.00% | 9.60% | |||||
| Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImageOneIndustriesLLCMember | whfcl:ImageOneIndustriesLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonAUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Acquisition Date | Sep. 20, 2019 | Sep. 20, 2019 | |||||
| Investment Owned, Balance, Shares | shares | 238 | 238 | 238 | 238 | |||
| Investment Owned, Balance, Principal Amount | $ 235,000 | ||||||
| Investment Owned, at Cost | $ 13,000 | 10,000 | |||||
| Investment Owned, at Fair Value | $ 12,000 | ||||||
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Technology | Health Care Technology | Health Care Technology | Health Care Technology | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.50% | 4.50% | 4.50% | 4.50% | |||
| Investment Interest Rate | 8.17% | 8.17% | 8.17% | 8.17% | |||
| Investment, Acquisition Date | May 01, 2025 | ||||||
| Investment Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |||
| Investment Owned, at Fair Value | $ 10,000 | ||||||
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Technology | Health Care Technology | Health Care Technology | Health Care Technology | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.50% | 4.50% | 4.50% | 4.50% | |||
| Investment Interest Rate | 8.17% | 8.17% | 8.17% | 8.17% | |||
| Investment, Acquisition Date | May 01, 2025 | ||||||
| Investment Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |||
| Investment Owned, at Fair Value | $ 4,000 | ||||||
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Technology | Health Care Technology | Health Care Technology | Health Care Technology | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.50% | 4.50% | 4.50% | 4.50% | |||
| Investment Interest Rate | 8.17% | 8.17% | 8.17% | 8.17% | |||
| Investment, Acquisition Date | May 01, 2025 | ||||||
| Investment Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 4,169,000 | ||||||
| Investment Owned, at Cost | 4,132,000 | ||||||
| Investment Owned, at Fair Value | $ 4,169,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 12.70% | ||||||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.42% | 9.42% | 9.42% | 9.42% | |||
| Investment, Acquisition Date | Feb. 19, 2025 | ||||||
| Investment Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |||
| Investment Owned, at Fair Value | $ 2,000 | ||||||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Revolving Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.42% | 9.42% | 9.42% | 9.42% | |||
| Investment, Acquisition Date | Mar. 24, 2025 | ||||||
| Investment Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |||
| Investment Owned, at Fair Value | $ 1,000 | ||||||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.42% | 9.42% | 9.42% | 9.42% | |||
| Investment, Acquisition Date | Feb. 19, 2025 | ||||||
| Investment Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 2,947,000 | ||||||
| Investment Owned, at Cost | 2,899,000 | ||||||
| Investment Owned, at Fair Value | $ 2,907,000 | ||||||
| Percent of net assets | 1.10% | 1.10% | 1.10% | 1.10% | |||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | Human Resource & Employment Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.42% | 9.42% | 9.42% | 9.42% | |||
| Investment, Acquisition Date | Mar. 24, 2025 | ||||||
| Investment Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 2,526,000 | ||||||
| Investment Owned, at Cost | 2,484,000 | ||||||
| Investment Owned, at Fair Value | $ 2,492,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 7.60% | ||||||
| Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ZephyrBuyerL.p.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.83% | 10.83% | |||||
| Investment, Acquisition Date | Jan. 31, 2024 | ||||||
| Investment Maturity Date | Jan. 31, 2030 | Jan. 31, 2030 | |||||
| Investment Owned, Balance, Principal Amount | $ 14,087,000 | ||||||
| Investment Owned, at Cost | 13,789,000 | ||||||
| Investment Owned, at Fair Value | $ 14,166,000 | ||||||
| Percent of net assets | 5.00% | 5.00% | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.56% | 9.56% | 9.56% | 9.56% | |||
| Investment, Acquisition Date | May 23, 2025 | ||||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 890,000 | ||||||
| Investment Owned, at Cost | 884,000 | ||||||
| Investment Owned, at Fair Value | $ 910,000 | ||||||
| Percent of net assets | 0.40% | 0.40% | 0.40% | 0.40% | |||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | whfcl:JuniperLandscapingHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 6.25% | 5.75% | 5.75% | 5.75% | 6.25% | |
| Investment Interest Rate | 9.43% | 10.85% | 9.43% | 9.43% | 9.43% | 10.85% | |
| Investment, Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | |||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2026 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 2,319,000 | $ 2,343,000 | |||||
| Investment Owned, at Cost | 2,309,000 | 2,326,000 | |||||
| Investment Owned, at Fair Value | $ 2,319,000 | $ 2,343,000 | |||||
| Fair Value As A Percentage of Member's Equity | 7.10% | 6.80% | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.51% | 9.51% | 9.51% | 9.51% | |||
| Investment, Acquisition Date | May 23, 2025 | ||||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 238,000 | ||||||
| Investment Owned, at Cost | 235,000 | ||||||
| Investment Owned, at Fair Value | $ 246,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | whfcl:JuniperLandscapingHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 6.25% | 5.75% | 5.75% | 5.75% | 6.25% | |
| Investment Interest Rate | 9.52% | 10.82% | 9.52% | 9.52% | 9.52% | 10.82% | |
| Investment, Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | |||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2026 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 310,000 | $ 517,000 | |||||
| Investment Owned, at Cost | 309,000 | 513,000 | |||||
| Investment Owned, at Fair Value | $ 314,000 | $ 522,000 | |||||
| Fair Value As A Percentage of Member's Equity | 1.00% | 1.50% | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.43% | 9.43% | 9.43% | 9.43% | |||
| Investment, Acquisition Date | May 23, 2025 | ||||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 454,000 | ||||||
| Investment Owned, at Cost | 449,000 | ||||||
| Investment Owned, at Fair Value | $ 454,000 | ||||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | |||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | whfcl:JuniperLandscapingHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 6.25% | 5.75% | 5.75% | 5.75% | 6.25% | |
| Investment Interest Rate | 9.43% | 10.84% | 9.43% | 9.43% | 9.43% | 10.84% | |
| Investment, Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | |||||
| Investment Maturity Date | Dec. 29, 2027 | Dec. 29, 2026 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 10,964,000 | $ 11,078,000 | |||||
| Investment Owned, at Cost | 10,917,000 | 11,000,000 | |||||
| Investment Owned, at Fair Value | $ 10,964,000 | $ 11,078,000 | |||||
| Fair Value As A Percentage of Member's Equity | 33.30% | 32.00% | |||||
| Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:KoreWirelessGroupIncMember | whfcl:KoreWirelessGroupIncMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.38% | 11.02% | 10.38% | 10.38% | 10.38% | 11.02% | |
| Investment, Acquisition Date | Nov. 27, 2023 | Nov. 27, 2023 | |||||
| Investment Maturity Date | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | |
| Investment Owned, at Fair Value | $ 10,000 | $ 9,000 | |||||
| Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:KoreWirelessGroupIncMember | whfcl:KoreWirelessGroupIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | Wireless Telecommunication Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.38% | 11.02% | 10.38% | 10.38% | 10.38% | 11.02% | |
| Investment, Acquisition Date | Nov. 27, 2023 | Nov. 27, 2023 | |||||
| Investment Maturity Date | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 6,290,000 | $ 6,354,000 | |||||
| Investment Owned, at Cost | 6,218,000 | 6,256,000 | |||||
| Investment Owned, at Fair Value | $ 6,290,000 | $ 6,323,000 | |||||
| Fair Value As A Percentage of Member's Equity | 19.10% | 18.30% | |||||
| Investment, Identifier [Axis]: Kelso Industries LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Kelso Industries L L C [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.09% | 10.09% | |||||
| Investment, Acquisition Date | Dec. 26, 2024 | ||||||
| Investment Maturity Date | Dec. 31, 2029 | Dec. 31, 2029 | |||||
| Investment, Identifier [Axis]: Kelso Industries LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Kelso Industries L L C [Member] | Kelso Industries L L C [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.57% | 10.09% | 9.57% | 9.57% | 9.57% | 10.09% | |
| Investment, Acquisition Date | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investment Maturity Date | Dec. 31, 2029 | Dec. 31, 2029 | Dec. 31, 2029 | Dec. 31, 2029 | Dec. 31, 2029 | Dec. 31, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 4,785,000 | $ 3,611,000 | |||||
| Investment Owned, at Cost | 4,710,000 | 3,539,000 | |||||
| Investment Owned, at Fair Value | $ 4,823,000 | $ 3,539,000 | |||||
| Percent of net assets | 1.90% | 1.20% | 1.90% | 1.90% | 1.90% | 1.20% | |
| Investment, Identifier [Axis]: Keras Holdings, LLC Shares | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:KerasHoldingsLLCMember | whfcl:KerasHoldingsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | whfcl:SharesMember | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | whfcl:SharesMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Acquisition Date | Dec. 31, 2020 | Dec. 31, 2020 | |||||
| Investment Owned, Balance, Shares | shares | 496 | 496 | 496 | 496 | |||
| Investment Owned, Balance, Principal Amount | $ 496,000 | ||||||
| Investment Owned, at Cost | $ 496,000 | 496,000 | |||||
| Investment Owned, at Fair Value | $ 446,000 | $ 779,000 | |||||
| Percent of net assets | 0.20% | 0.30% | 0.20% | 0.20% | 0.20% | 0.30% | |
| Investment, Identifier [Axis]: LINC Systems, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LINCSystemsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment Interest Rate | 12.99% | 12.99% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, at Fair Value | $ 3,000 | ||||||
| Investment, Identifier [Axis]: LINC Systems, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LINCSystemsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.50% | 8.50% | |||||
| Investment Interest Rate | 12.99% | 12.99% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,155,000 | ||||||
| Investment Owned, at Cost | 8,114,000 | ||||||
| Investment Owned, at Fair Value | $ 8,155,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 23.70% | ||||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LINCSystemsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LINCSystemsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||
| Investment Owned, Balance, Principal Amount | $ 7,900,000 | ||||||
| Investment Owned, at Cost | 7,895,000 | ||||||
| Investment Owned, at Fair Value | $ 7,900,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 24.00% | ||||||
| Investment, Identifier [Axis]: LSCS Holdings, Inc. Second Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LSCSHoldingsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.47% | 12.47% | |||||
| Investment, Acquisition Date | Nov. 23, 2021 | ||||||
| Investment Maturity Date | Dec. 16, 2029 | Dec. 16, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,000,000 | ||||||
| Investment Owned, at Cost | 4,953,000 | ||||||
| Investment Owned, at Fair Value | $ 5,000,000 | ||||||
| Percent of net assets | 1.70% | 1.70% | |||||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LabLogisticsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 7.25% | 7.25% | |||||
| Investment Interest Rate | 11.71% | 11.71% | |||||
| Investment, Acquisition Date | Oct. 16, 2019 | ||||||
| Investment Maturity Date | Dec. 31, 2025 | Dec. 31, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,020,000 | ||||||
| Investment Owned, at Cost | 5,020,000 | ||||||
| Investment Owned, at Fair Value | $ 5,020,000 | ||||||
| Percent of net assets | 1.80% | 1.80% | |||||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LabLogisticsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 7.25% | 7.25% | |||||
| Investment Interest Rate | 11.71% | 11.71% | |||||
| Investment, Acquisition Date | Sep. 17, 2024 | ||||||
| Investment Maturity Date | Dec. 31, 2025 | Dec. 31, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 437,000 | ||||||
| Investment Owned, at Cost | 437,000 | ||||||
| Investment Owned, at Fair Value | $ 437,000 | ||||||
| Percent of net assets | 0.20% | 0.20% | |||||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LabLogisticsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 7.25% | 7.25% | |||||
| Investment Interest Rate | 11.71% | 11.71% | |||||
| Investment, Acquisition Date | Oct. 16, 2019 | ||||||
| Investment Maturity Date | Dec. 31, 2025 | Dec. 31, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,383,000 | ||||||
| Investment Owned, at Cost | 5,381,000 | ||||||
| Investment Owned, at Fair Value | $ 5,383,000 | ||||||
| Percent of net assets | 1.90% | 1.90% | |||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LeviathanIntermediateHoldcoLlcMember | whfcl:LeviathanIntermediateHoldcoLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.00% | 7.50% | 6.00% | 6.00% | 6.00% | 7.50% | |
| Investment Interest Rate | 9.67% | 11.98% | 9.67% | 9.67% | 9.67% | 11.98% | |
| Investment, Acquisition Date | Dec. 27, 2022 | Dec. 27, 2022 | |||||
| Investment Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |
| Investment Owned, at Fair Value | $ 4,000 | $ 10,000 | |||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LeviathanIntermediateHoldcoLlcMember | whfcl:LeviathanIntermediateHoldcoLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.00% | 7.50% | 6.00% | 6.00% | 6.00% | 7.50% | |
| Investment Interest Rate | 9.67% | 11.98% | 9.67% | 9.67% | 9.67% | 11.98% | |
| Investment, Acquisition Date | Dec. 27, 2022 | Dec. 27, 2022 | |||||
| Investment Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 13,645,000 | $ 13,211,000 | |||||
| Investment Owned, at Cost | 13,486,000 | 12,981,000 | |||||
| Investment Owned, at Fair Value | $ 13,584,000 | $ 13,312,000 | |||||
| Percent of net assets | 5.20% | 4.60% | 5.20% | 5.20% | 5.20% | 4.60% | |
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LiftBrandsIncMember | whfcl:LiftBrandsIncMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | |
| Investment Interest Rate | 11.32% | 11.96% | 11.32% | 11.32% | 11.32% | 11.96% | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||
| Investment Maturity Date | Sep. 30, 2026 | Jun. 29, 2025 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Jun. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 5,120,000 | $ 5,461,000 | |||||
| Investment Owned, at Cost | 5,119,000 | 5,453,000 | |||||
| Investment Owned, at Fair Value | $ 5,120,000 | $ 5,461,000 | |||||
| Percent of net assets | 2.00% | 1.90% | 2.00% | 2.00% | 2.00% | 1.90% | |
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LiftBrandsIncMember | whfcl:LiftBrandsIncMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||
| Investment Maturity Date | Sep. 30, 2026 | Jun. 29, 2025 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Jun. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 1,753,000 | $ 1,594,000 | |||||
| Investment Owned, at Cost | 1,752,000 | 1,592,000 | |||||
| Investment Owned, at Fair Value | $ 1,753,000 | $ 1,594,000 | |||||
| Investment, Interest Rate, Paid in Kind | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Percent of net assets | 0.70% | 0.60% | 0.70% | 0.70% | 0.70% | 0.60% | |
| Investment, Identifier [Axis]: LogicMonitor, Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LogicmonitorInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 9.99% | 9.99% | |||||
| Investment, Acquisition Date | Nov. 19, 2024 | ||||||
| Investment Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,220,000 | ||||||
| Investment Owned, at Cost | 6,144,000 | ||||||
| Investment Owned, at Fair Value | $ 6,144,000 | ||||||
| Percent of net assets | 2.10% | 2.10% | |||||
| Investment, Identifier [Axis]: LogicMonitor, Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LogicmonitorInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.34% | 9.34% | 9.34% | 9.34% | |||
| Investment, Acquisition Date | Dec. 02, 2025 | ||||||
| Investment Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |||
| Investment, Identifier [Axis]: LogicMonitor, Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LogicmonitorInc.Member | whfcl:LogicmonitorInc.Member | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 9.34% | 9.99% | 9.34% | 9.34% | 9.34% | 9.99% | |
| Investment, Acquisition Date | Nov. 19, 2024 | Nov. 19, 2024 | |||||
| Investment Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |
| Investment Owned, at Fair Value | $ 5,000 | ||||||
| Investment, Identifier [Axis]: LogicMonitor, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LogicmonitorInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.34% | 9.34% | 9.34% | 9.34% | |||
| Investment, Acquisition Date | Nov. 19, 2024 | ||||||
| Investment Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 8,220,000 | ||||||
| Investment Owned, at Cost | 8,130,000 | ||||||
| Investment Owned, at Fair Value | $ 8,186,000 | ||||||
| Percent of net assets | 3.20% | 3.20% | 3.20% | 3.20% | |||
| Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LuxuryBrandHoldingsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Broadline Retail | Broadline Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.11% | 10.11% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||
| Investment Maturity Date | Jun. 04, 2026 | Jun. 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,580,000 | ||||||
| Investment Owned, at Cost | 4,556,000 | ||||||
| Investment Owned, at Fair Value | $ 4,580,000 | ||||||
| Percent of net assets | 1.60% | 1.60% | |||||
| Investment, Identifier [Axis]: M2S Group Intermediate Holdings, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:M2sGroupIntermediateHoldingsIncMember | whfcl:M2sGroupIntermediateHoldingsIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Paper Products | Paper Products | Paper Products | Paper Products | Paper Products | Paper Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 4.75% | 4.73% | 4.75% | 4.75% | 4.75% | 4.73% | |
| Investment Interest Rate | 8.59% | 9.10% | 8.59% | 8.59% | 8.59% | 9.10% | |
| Investment, Acquisition Date | Aug. 22, 2024 | Aug. 22, 2024 | |||||
| Investment Maturity Date | Aug. 25, 2031 | Aug. 25, 2031 | Aug. 25, 2031 | Aug. 25, 2031 | Aug. 25, 2031 | Aug. 25, 2031 | |
| Investment Owned, Balance, Principal Amount | $ 9,368,000 | $ 9,770,000 | |||||
| Investment Owned, at Cost | 8,838,000 | 9,119,000 | |||||
| Investment Owned, at Fair Value | $ 9,276,000 | $ 9,453,000 | |||||
| Percent of net assets | 3.60% | 3.30% | 3.60% | 3.60% | 3.60% | 3.30% | |
| Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MbsHighwayLlcMember | whfcl:MbsHighwayLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.50% | 8.00% | 8.00% | 8.00% | 8.50% | |
| Investment Interest Rate | 12.03% | 13.20% | 12.03% | 12.03% | 12.03% | 13.20% | |
| Investment, Acquisition Date | Oct. 13, 2022 | Oct. 13, 2022 | |||||
| Investment Maturity Date | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 9,204,000 | $ 9,286,000 | |||||
| Investment Owned, at Cost | 9,122,000 | 9,157,000 | |||||
| Investment Owned, at Fair Value | $ 9,184,000 | $ 9,212,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 12.70% | 12.70% | |||||
| Percent of net assets | 3.50% | 3.20% | 3.50% | 3.50% | 3.50% | 3.20% | |
| Investment, Identifier [Axis]: MGT Merger Target, LLC (d/b/a MGT Consulting Group), First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.74% | 8.74% | 8.74% | 8.74% | |||
| Investment, Acquisition Date | Apr. 08, 2025 | ||||||
| Investment Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 283,000 | ||||||
| Investment Owned, at Cost | 281,000 | ||||||
| Investment Owned, at Fair Value | $ 300,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | MGT Merger Target, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.97% | 5.00% | 5.00% | 5.00% | 5.97% | |
| Investment Interest Rate | 8.72% | 10.51% | 8.72% | 8.72% | 8.72% | 10.51% | |
| Investment, Acquisition Date | May 10, 2023 | May 10, 2023 | |||||
| Investment Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,322,000 | $ 821,000 | |||||
| Investment Owned, at Cost | 1,300,000 | 804,000 | |||||
| Investment Owned, at Fair Value | $ 1,322,000 | $ 817,000 | |||||
| Fair Value As A Percentage of Member's Equity | 4.00% | 2.40% | |||||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 13.00% | 13.00% | |||||
| Investment, Acquisition Date | May 10, 2023 | ||||||
| Investment Maturity Date | Apr. 10, 2028 | Apr. 10, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 241,000 | ||||||
| Investment Owned, at Cost | 236,000 | ||||||
| Investment Owned, at Fair Value | $ 249,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.70% | ||||||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.39% | 6.39% | |||||
| Investment Interest Rate | 10.85% | 10.85% | |||||
| Investment, Acquisition Date | May 10, 2023 | ||||||
| Investment Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,187,000 | ||||||
| Investment Owned, at Cost | 7,040,000 | ||||||
| Investment Owned, at Fair Value | $ 7,176,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 20.70% | ||||||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | Prime Rate [Member] | Prime Rate [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.00% | 4.00% | 4.00% | 4.00% | |||
| Investment Interest Rate | 10.75% | 10.75% | 10.75% | 10.75% | |||
| Investment, Acquisition Date | Apr. 07, 2025 | ||||||
| Investment Maturity Date | Apr. 10, 2028 | Apr. 10, 2028 | Apr. 10, 2028 | Apr. 10, 2028 | |||
| Investment Owned, Balance, Principal Amount | $ 714,000 | ||||||
| Investment Owned, at Cost | 705,000 | ||||||
| Investment Owned, at Fair Value | $ 715,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 2.20% | ||||||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.72% | 8.72% | 8.72% | 8.72% | |||
| Investment, Acquisition Date | May 10, 2023 | ||||||
| Investment Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 8,555,000 | ||||||
| Investment Owned, at Cost | 8,430,000 | ||||||
| Investment Owned, at Fair Value | $ 8,567,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 26.10% | ||||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MSIInformationServicesIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.82% | 8.82% | |||||
| Investment, Acquisition Date | Apr. 25, 2022 | ||||||
| Investment Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,050,000 | ||||||
| Investment Owned, at Cost | 1,043,000 | ||||||
| Investment Owned, at Fair Value | $ 945,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 16.11% | 16.11% | |||||
| Percent of net assets | 0.30% | 0.30% | |||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MSIInformationServicesIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 9.75% | 9.75% | |||||
| Investment, Acquisition Date | Apr. 25, 2022 | ||||||
| Investment Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,746,000 | ||||||
| Investment Owned, at Cost | 8,552,000 | ||||||
| Investment Owned, at Fair Value | $ 7,871,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 14.23% | 14.23% | |||||
| Percent of net assets | 2.80% | 2.80% | |||||
| Investment, Identifier [Axis]: Mamp;M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | M&M OpCo. LLC (d/b/a Escalent, Inc.) | M&M OpCo. LLC (d/b/a Escalent, Inc.) | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 8.00% | 6.00% | 6.00% | 6.00% | 8.00% | |
| Investment Interest Rate | 9.67% | 12.43% | 9.67% | 9.67% | 9.67% | 12.43% | |
| Investment, Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | |||||
| Investment Maturity Date | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | |
| Investment Owned, at Fair Value | $ 4,000 | $ 5,000 | |||||
| Investment, Identifier [Axis]: Mamp;M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | M&M OpCo. LLC (d/b/a Escalent, Inc.) | M&M OpCo. LLC (d/b/a Escalent, Inc.) | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 8.00% | 6.00% | 6.00% | 6.00% | 8.00% | |
| Investment Interest Rate | 9.67% | 12.43% | 9.67% | 9.67% | 9.67% | 12.43% | |
| Investment, Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | |||||
| Investment Maturity Date | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 4,827,000 | $ 4,927,000 | |||||
| Investment Owned, at Cost | 4,748,000 | 4,823,000 | |||||
| Investment Owned, at Fair Value | $ 4,827,000 | $ 4,922,000 | |||||
| Percent of net assets | 1.90% | 1.70% | 1.90% | 1.90% | 1.90% | 1.70% | |
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.25% | 4.25% | 4.25% | 4.25% | |||
| Investment Interest Rate | 8.12% | 8.12% | 8.12% | 8.12% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |||
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.25% | 4.25% | 4.25% | 4.25% | |||
| Investment Interest Rate | 8.12% | 8.12% | 8.12% | 8.12% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |||
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.25% | 4.25% | 4.25% | 4.25% | |||
| Investment Interest Rate | 8.12% | 8.12% | 8.12% | 8.12% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 6,045,000 | ||||||
| Investment Owned, at Cost | 5,986,000 | ||||||
| Investment Owned, at Fair Value | $ 5,985,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 18.20% | ||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarlinDTC-LSMidco2LLCMember | whfcl:MarlinDTC-LSMidco2LLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.32% | 11.03% | 10.32% | 10.32% | 10.32% | 11.03% | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||
| Investment Maturity Date | Jul. 01, 2026 | Jul. 01, 2025 | Jul. 01, 2026 | Jul. 01, 2026 | Jul. 01, 2026 | Jul. 01, 2025 | |
| Investment Owned, at Fair Value | $ (39,000) | $ (38,000) | |||||
| Fair Value As A Percentage of Member's Equity | (0.10%) | (0.10%) | |||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarlinDTC-LSMidco2LLCMember | whfcl:MarlinDTC-LSMidco2LLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.32% | 11.03% | 10.32% | 10.32% | 10.32% | 11.03% | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||
| Investment Maturity Date | Jul. 01, 2026 | Jul. 01, 2025 | Jul. 01, 2026 | Jul. 01, 2026 | Jul. 01, 2026 | Jul. 01, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 18,019,000 | $ 18,613,000 | |||||
| Investment Owned, at Cost | 18,019,000 | 18,577,000 | |||||
| Investment Owned, at Fair Value | $ 17,299,000 | $ 17,865,000 | |||||
| Fair Value As A Percentage of Member's Equity | 52.60% | 51.60% | |||||
| Investment, Identifier [Axis]: Max Solutions Inc. Common Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | whfcl:MaxSolutionsIncMember | |||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Leisure Products | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Leisure Products | |
| Investment, Acquisition Date | Sep. 29, 2022 | Sep. 29, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 4 | 4 | 4 | 4 | |||
| Investment Owned, Balance, Principal Amount | $ 4,000 | ||||||
| Investment Owned, at Cost | $ 400,000 | $ 400,000 | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.10% | 8.10% | |||||
| Investment Interest Rate | 12.56% | 12.56% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 414,000 | ||||||
| Investment Owned, at Cost | 411,000 | ||||||
| Investment Owned, at Fair Value | $ 402,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.20% | ||||||
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.10% | 8.10% | |||||
| Investment Interest Rate | 12.56% | 12.56% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment Owned, at Fair Value | $ (3,000) | ||||||
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.11% | 8.11% | |||||
| Investment Interest Rate | 12.57% | 12.57% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,521,000 | ||||||
| Investment Owned, at Cost | 6,439,000 | ||||||
| Investment Owned, at Fair Value | $ 6,324,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 18.30% | ||||||
| Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.90% | 6.90% | 6.90% | 6.90% | |||
| Investment Interest Rate | 10.89% | 10.89% | 10.89% | 10.89% | |||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||
| Investment Owned, Balance, Principal Amount | $ 410,000 | ||||||
| Investment Owned, at Cost | 407,000 | ||||||
| Investment Owned, at Fair Value | $ 408,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.20% | ||||||
| Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | whfcl:CanadianOvernightRepoRateAverageMember | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.90% | 6.90% | 6.90% | 6.90% | |||
| Investment Interest Rate | 10.89% | 10.89% | 10.89% | 10.89% | |||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||
| Investment Owned, at Fair Value | $ 1,000 | ||||||
| Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.91% | 6.91% | 6.91% | 6.91% | |||
| Investment Interest Rate | 10.90% | 10.90% | 10.90% | 10.90% | |||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||
| Investment Owned, Balance, Principal Amount | $ 6,451,000 | ||||||
| Investment Owned, at Cost | 6,392,000 | ||||||
| Investment Owned, at Fair Value | $ 6,420,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 19.50% | ||||||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.82% | 9.82% | 9.82% | 9.82% | |||
| Investment, Acquisition Date | Dec. 27, 2024 | ||||||
| Investment Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 938,000 | ||||||
| Investment Owned, at Cost | 930,000 | ||||||
| Investment Owned, at Fair Value | $ 942,000 | ||||||
| Percent of net assets | 0.40% | 0.40% | 0.40% | 0.40% | |||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 10.46% | 10.46% | |||||
| Investment, Acquisition Date | Dec. 27, 2024 | ||||||
| Investment Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 947,000 | ||||||
| Investment Owned, at Cost | 938,000 | ||||||
| Investment Owned, at Fair Value | $ 938,000 | ||||||
| Percent of net assets | 0.30% | 0.30% | |||||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.82% | 9.82% | 9.82% | 9.82% | |||
| Investment, Acquisition Date | Apr. 11, 2023 | ||||||
| Investment Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |||
| Investment Owned, at Fair Value | $ 8,000 | ||||||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | whfcl:MaxorAcquisitionInc.Member | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | |
| Investment Interest Rate | 9.82% | 10.46% | 9.82% | 9.82% | 9.82% | 10.46% | |
| Investment, Acquisition Date | Apr. 11, 2023 | Apr. 11, 2023 | |||||
| Investment Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 4,951,000 | $ 5,002,000 | |||||
| Investment Owned, at Cost | 4,872,000 | 4,898,000 | |||||
| Investment Owned, at Fair Value | $ 4,974,000 | $ 4,986,000 | |||||
| Fair Value As A Percentage of Member's Equity | 15.10% | 14.40% | |||||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc.First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 10.46% | 10.46% | |||||
| Investment, Acquisition Date | Apr. 11, 2023 | ||||||
| Investment Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | |||||
| Investment Owned, at Fair Value | $ 9,000 | ||||||
| Investment, Identifier [Axis]: Media Source, LLC (d/b/a Media Source Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Media Source, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.54% | 9.54% | 9.54% | 9.54% | |||
| Investment, Acquisition Date | Sep. 01, 2025 | ||||||
| Investment Maturity Date | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | |||
| Investment Owned, at Fair Value | $ 17,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Investment, Interest Rate, Paid in Cash | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Investment, Identifier [Axis]: Media Source, LLC (d/b/a Media Source Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Media Source, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.54% | 9.54% | 9.54% | 9.54% | |||
| Investment, Acquisition Date | Sep. 01, 2025 | ||||||
| Investment Maturity Date | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 4,242,000 | ||||||
| Investment Owned, at Cost | 4,242,000 | ||||||
| Investment Owned, at Fair Value | $ 4,242,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Investment, Interest Rate, Paid in Cash | 4.77% | 4.77% | 4.77% | 4.77% | |||
| Percent of net assets | 1.60% | 1.60% | 1.60% | 1.60% | |||
| Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MedicalDeviceIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.25% | 1.25% | |||||
| Spread Above Index | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.68% | 10.68% | |||||
| Investment, Acquisition Date | Jul. 27, 2023 | ||||||
| Investment Maturity Date | Jul. 11, 2029 | Jul. 11, 2029 | |||||
| Investment Owned, at Fair Value | $ 6,000 | ||||||
| Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MedicalDeviceIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.25% | 1.25% | |||||
| Spread Above Index | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.68% | 10.68% | |||||
| Investment, Acquisition Date | Jul. 27, 2023 | ||||||
| Investment Maturity Date | Jul. 11, 2029 | Jul. 11, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,633,000 | ||||||
| Investment Owned, at Cost | 2,584,000 | ||||||
| Investment Owned, at Fair Value | $ 2,660,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 7.70% | ||||||
| Investment, Identifier [Axis]: Merriman Holdings LP (d/b/a Escalent, Inc.) Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MerrimanHoldingsLPMember | whfcl:MerrimanHoldingsLPMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | |||||
| Investment Owned, Balance, Shares | shares | 327 | 327 | 327 | 327 | |||
| Investment Owned, Balance, Principal Amount | $ 327,000 | ||||||
| Investment Owned, at Cost | $ 333,000 | 333 | |||||
| Investment Owned, at Fair Value | $ 312,000 | $ 368,000 | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | |
| Investment, Identifier [Axis]: Meta Buyer LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 1.00% | 0.75% | 0.75% | 0.75% | 1.00% | |
| Spread Above Index | 5.25% | 6.00% | 5.25% | 5.25% | 5.25% | 6.00% | |
| Investment Interest Rate | 8.94% | 10.51% | 8.94% | 8.94% | 8.94% | 10.51% | |
| Investment, Acquisition Date | Dec. 22, 2025 | Dec. 16, 2021 | |||||
| Investment Maturity Date | Dec. 22, 2031 | Nov. 01, 2027 | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | Nov. 01, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 874,000 | ||||||
| Investment Owned, at Cost | 865,000 | ||||||
| Investment Owned, at Fair Value | $ 874,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 2.50% | ||||||
| Investment, Identifier [Axis]: Meta Buyer LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 1.00% | 0.75% | 0.75% | 0.75% | 1.00% | |
| Spread Above Index | 5.25% | 6.00% | 5.25% | 5.25% | 5.25% | 6.00% | |
| Investment Interest Rate | 8.94% | 10.44% | 8.94% | 8.94% | 8.94% | 10.44% | |
| Investment, Acquisition Date | Dec. 22, 2025 | Dec. 16, 2021 | |||||
| Investment Maturity Date | Dec. 22, 2031 | Nov. 01, 2027 | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | Nov. 01, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 1,156,000 | ||||||
| Investment Owned, at Cost | 1,145,000 | ||||||
| Investment Owned, at Fair Value | $ 1,160,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 3.40% | ||||||
| Investment, Identifier [Axis]: Meta Buyer LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate Three Month Term [Member] | whfcl:EuroInterbankOfferedRateMember | Euro Interbank Offered Rate Three Month Term [Member] | Euro Interbank Offered Rate Three Month Term [Member] | Euro Interbank Offered Rate Three Month Term [Member] | whfcl:EuroInterbankOfferedRateMember | |
| Investment, Interest Rate, Floor | 0.75% | 1.00% | 0.75% | 0.75% | 0.75% | 1.00% | |
| Spread Above Index | 5.25% | 6.00% | 5.25% | 5.25% | 5.25% | 6.00% | |
| Investment Interest Rate | 7.29% | 8.85% | 7.29% | 7.29% | 7.29% | 8.85% | |
| Investment, Acquisition Date | Dec. 22, 2025 | Dec. 16, 2021 | |||||
| Investment Maturity Date | Dec. 22, 2031 | Nov. 01, 2027 | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | Nov. 01, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 4,621,000 | $ 12,039,000 | |||||
| Investment Owned, at Cost | 5,378,000 | 13,449,000 | |||||
| Investment Owned, at Fair Value | $ 5,374,000 | $ 12,465,000 | |||||
| Fair Value As A Percentage of Member's Equity | 36.00% | ||||||
| Percent of net assets | 2.10% | 2.10% | 2.10% | 2.10% | |||
| Investment, Identifier [Axis]: Meta Buyer LLC First Lien Secured Term Loan Two | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 1.00% | 0.75% | 0.75% | 0.75% | 1.00% | |
| Spread Above Index | 5.25% | 6.00% | 5.25% | 5.25% | 5.25% | 6.00% | |
| Investment Interest Rate | 8.94% | 10.48% | 8.94% | 8.94% | 8.94% | 10.48% | |
| Investment, Acquisition Date | Dec. 22, 2025 | Dec. 16, 2021 | |||||
| Investment Maturity Date | Dec. 22, 2031 | Nov. 01, 2027 | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | Nov. 01, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 6,720,000 | $ 962,000 | |||||
| Investment Owned, at Cost | 6,653,000 | 952,000 | |||||
| Investment Owned, at Fair Value | $ 6,653,000 | $ 962,000 | |||||
| Fair Value As A Percentage of Member's Equity | 2.80% | ||||||
| Percent of net assets | 2.60% | 2.60% | 2.60% | 2.60% | |||
| Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Midwest Texas Tea CA, LLC [Member] | Midwest Texas Tea CA, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | Distributors | Distributors | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | 7.50% | 7.50% | 7.25% | |
| Investment Interest Rate | 11.32% | 11.71% | 11.32% | 11.32% | 11.32% | 11.71% | |
| Investment, Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | |||||
| Investment Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 639,000 | $ 645,000 | |||||
| Investment Owned, at Cost | 629,000 | 632,000 | |||||
| Investment Owned, at Fair Value | $ 639,000 | $ 642,000 | |||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Midwest Texas Tea CA, LLC [Member] | Midwest Texas Tea CA, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | Distributors | Distributors | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Base Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 6.92% | 7.50% | 7.50% | 7.50% | 6.92% | |
| Investment Interest Rate | 11.32% | 12.39% | 11.32% | 11.32% | 11.32% | 12.39% | |
| Investment, Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | |||||
| Investment Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 572,000 | $ 326,000 | |||||
| Investment Owned, at Cost | 563,000 | 319,000 | |||||
| Investment Owned, at Fair Value | $ 572,000 | $ 328,000 | |||||
| Percent of net assets | 0.20% | 0.10% | 0.20% | 0.20% | 0.20% | 0.10% | |
| Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Midwest Texas Tea CA, LLC [Member] | Midwest Texas Tea CA, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | Distributors | Distributors | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | 7.50% | 7.50% | 7.25% | |
| Investment Interest Rate | 11.32% | 11.71% | 11.32% | 11.32% | 11.32% | 11.71% | |
| Investment, Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | |||||
| Investment Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 9,188,000 | $ 9,443,000 | |||||
| Investment Owned, at Cost | 9,051,000 | 9,255,000 | |||||
| Investment Owned, at Fair Value | $ 9,193,000 | $ 9,399,000 | |||||
| Percent of net assets | 3.50% | 3.30% | 3.50% | 3.50% | 3.50% | 3.30% | |
| Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MonarchCollectiveHoldingsLlcMember | whfcl:MonarchCollectiveHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 7.25% | 6.75% | 7.25% | 7.25% | 7.25% | 6.75% | |
| Investment Interest Rate | 10.97% | 11.16% | 10.97% | 10.97% | 10.97% | 11.16% | |
| Investment, Acquisition Date | Jan. 10, 2024 | Jan. 10, 2024 | |||||
| Investment Maturity Date | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,579,000 | $ 1,596,000 | |||||
| Investment Owned, at Cost | 1,562,000 | 1,572,000 | |||||
| Investment Owned, at Fair Value | $ 1,553,000 | $ 1,582,000 | |||||
| Percent of net assets | 0.60% | 0.60% | 0.60% | 0.60% | 0.60% | 0.60% | |
| Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MonarchCollectiveHoldingsLlcMember | whfcl:MonarchCollectiveHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 7.25% | 6.75% | 7.25% | 7.25% | 7.25% | 6.75% | |
| Investment Interest Rate | 10.92% | 11.08% | 10.92% | 10.92% | 10.92% | 11.08% | |
| Investment, Acquisition Date | Jan. 10, 2024 | Jan. 10, 2024 | |||||
| Investment Maturity Date | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | Jan. 10, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 9,212,000 | $ 9,306,000 | |||||
| Investment Owned, at Cost | 9,073,000 | 9,119,000 | |||||
| Investment Owned, at Fair Value | $ 9,061,000 | $ 9,223,000 | |||||
| Percent of net assets | 3.50% | 3.20% | 3.50% | 3.50% | 3.50% | 3.20% | |
| Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MotivationalCIVLLCMember | whfcl:MotivationalCIVLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||
| Investment Owned, Balance, Shares | shares | 1,250 | 1,250 | 1,250 | 1,250 | |||
| Investment Owned, Balance, Principal Amount | $ 1,250,000 | ||||||
| Investment Owned, at Cost | $ 1,250,000 | $ 1,250,000 | |||||
| Investment Owned, at Fair Value | $ 774,000 | ||||||
| Percent of net assets | 0.30% | 0.30% | 0.30% | 0.30% | |||
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MotivationalMarketingLLCMember | whfcl:MotivationalMarketingLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 8.50% | 6.50% | 6.50% | 6.50% | 8.50% | |
| Investment Interest Rate | 10.48% | 13.00% | 10.48% | 10.48% | 10.48% | 13.00% | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||
| Investment Maturity Date | Jul. 12, 2028 | Jul. 12, 2026 | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 630,000 | $ 1,182,000 | |||||
| Investment Owned, at Cost | 626,000 | 1,175,000 | |||||
| Investment Owned, at Fair Value | $ 637,000 | $ 1,061,000 | |||||
| Investment, Interest Rate, Paid in Kind | 2.00% | 2.00% | |||||
| Investment, Interest Rate, Paid in Cash | 11.00% | 11.00% | |||||
| Percent of net assets | 0.20% | 0.40% | 0.20% | 0.20% | 0.20% | 0.40% | |
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MotivationalMarketingLLCMember | whfcl:MotivationalMarketingLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 8.50% | 6.50% | 6.50% | 6.50% | 8.50% | |
| Investment Interest Rate | 10.37% | 12.96% | 10.37% | 10.37% | 10.37% | 12.96% | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||
| Investment Maturity Date | Jul. 12, 2028 | Jul. 12, 2026 | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 13,175,000 | $ 10,510,000 | |||||
| Investment Owned, at Cost | 13,104,000 | 10,449,000 | |||||
| Investment Owned, at Fair Value | $ 13,135,000 | $ 9,438,000 | |||||
| Investment, Interest Rate, Paid in Kind | 7.48% | 7.48% | |||||
| Investment, Interest Rate, Paid in Cash | 5.48% | 5.48% | |||||
| Percent of net assets | 5.00% | 3.20% | 5.00% | 5.00% | 5.00% | 3.20% | |
| Investment, Identifier [Axis]: NM Z Holdco Inc. (d/b/a Zep, Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NmZHoldcoIncZepIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.67% | 8.67% | 8.67% | 8.67% | |||
| Investment, Acquisition Date | Aug. 12, 2025 | ||||||
| Investment Maturity Date | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | |||
| Investment Owned, at Fair Value | $ 6,000 | ||||||
| Investment, Identifier [Axis]: NM Z Holdco Inc. (d/b/a Zep, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NmZHoldcoIncZepIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.67% | 8.67% | 8.67% | 8.67% | |||
| Investment, Acquisition Date | Aug. 12, 2025 | ||||||
| Investment Maturity Date | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 10,388,000 | ||||||
| Investment Owned, at Cost | 10,293,000 | ||||||
| Investment Owned, at Fair Value | $ 10,378,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 31.60% | ||||||
| Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NNAServicesLLCMember | whfcl:NNAServicesLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 7.25% | 6.75% | 6.75% | 6.75% | 7.25% | |
| Investment Interest Rate | 10.57% | 11.73% | 10.57% | 10.57% | 10.57% | 11.73% | |
| Investment, Acquisition Date | Aug. 27, 2021 | Aug. 27, 2021 | |||||
| Investment Maturity Date | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 8,073,000 | $ 9,125,000 | |||||
| Investment Owned, at Cost | 8,060,000 | 9,087,000 | |||||
| Investment Owned, at Fair Value | $ 8,037,000 | $ 8,941,000 | |||||
| Percent of net assets | 3.10% | 3.10% | 3.10% | 3.10% | 3.10% | 3.10% | |
| Investment, Identifier [Axis]: NPAV Lessor Corp. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 725,000 | ||||||
| Investment Owned, at Cost | 719,000 | ||||||
| Investment Owned, at Fair Value | $ 660,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.90% | ||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,502,000 | ||||||
| Investment Owned, at Cost | 6,448,000 | ||||||
| Investment Owned, at Fair Value | $ 5,918,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 17.10% | ||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 725,000 | ||||||
| Investment Owned, at Cost | 722,000 | ||||||
| Investment Owned, at Fair Value | $ 660,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 2.00% | ||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services | Real Estate Services | Real Estate Services | Real Estate Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 5,517,000 | ||||||
| Investment Owned, at Cost | 5,493,000 | ||||||
| Investment Owned, at Fair Value | $ 5,022,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 15.30% | ||||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NavigaIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.84% | 6.84% | |||||
| Investment Interest Rate | 12.78% | 12.78% | |||||
| Investment, Acquisition Date | Jun. 14, 2019 | ||||||
| Investment Maturity Date | Jun. 28, 2024 | Jun. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 301,000 | ||||||
| Investment Owned, at Cost | 301,000 | ||||||
| Investment Owned, at Fair Value | $ 169,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NavigaIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 7.00% | 7.00% | |||||
| Investment Interest Rate | 12.40% | 12.40% | |||||
| Investment, Acquisition Date | Jun. 14, 2019 | ||||||
| Investment Maturity Date | Jun. 28, 2024 | Jun. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,140,000 | ||||||
| Investment Owned, at Cost | 3,140,000 | ||||||
| Investment Owned, at Fair Value | $ 1,763,000 | ||||||
| Percent of net assets | 0.60% | 0.60% | |||||
| Investment, Identifier [Axis]: New American Crafts Holdings, LLC Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NewAmericanCraftsHoldingsLlcMember | whfcl:NewAmericanCraftsHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | |||||
| Investment, Acquisition Date | Mar. 16, 2023 | ||||||
| Investment Owned, Balance, Shares | shares | 1 | 1 | |||||
| Investment, Identifier [Axis]: Oil amp; Gas Storage amp; Transportation First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IslandEnergyServicesLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Oil and Gas Storage and Transportation [Member] | Oil and Gas Storage and Transportation [Member] | Oil and Gas Storage and Transportation [Member] | Oil and Gas Storage and Transportation [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.64% | 9.64% | 9.64% | 9.64% | |||
| Investment, Acquisition Date | Jul. 16, 2025 | ||||||
| Investment Maturity Date | Jul. 16, 2032 | Jul. 16, 2032 | Jul. 16, 2032 | Jul. 16, 2032 | |||
| Investment Owned, Balance, Principal Amount | $ 10,472,000 | ||||||
| Investment Owned, at Cost | 10,077,000 | ||||||
| Investment Owned, at Fair Value | $ 10,158,000 | ||||||
| Percent of net assets | 3.90% | 3.90% | 3.90% | 3.90% | |||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | Panos Brands, Llc [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.48% | 10.15% | 9.48% | 9.48% | 9.48% | 10.15% | |
| Investment, Acquisition Date | May 14, 2024 | Jun. 14, 2024 | |||||
| Investment Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 30,000 | ||||||
| Investment Owned, at Cost | 30,000 | ||||||
| Investment Owned, at Fair Value | $ 6,000 | $ 36,000 | |||||
| Fair Value As A Percentage of Member's Equity | 0.10% | ||||||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | Panos Brands, Llc [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.48% | 10.15% | 9.48% | 9.48% | 9.48% | 10.15% | |
| Investment, Acquisition Date | Jun. 14, 2024 | May 14, 2024 | |||||
| Investment Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 27,000 | ||||||
| Investment Owned, at Cost | 27,000 | ||||||
| Investment Owned, at Fair Value | $ 6,000 | $ 33,000 | |||||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.13% | 10.13% | |||||
| Investment, Acquisition Date | Jun. 14, 2024 | ||||||
| Investment Maturity Date | May 14, 2029 | May 14, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,520,000 | ||||||
| Investment Owned, at Cost | 4,441,000 | ||||||
| Investment Owned, at Fair Value | $ 4,505,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 13.00% | ||||||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | Panos Brands, Llc [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.48% | 10.13% | 9.48% | 9.48% | 9.48% | 10.13% | |
| Investment, Acquisition Date | Jun. 14, 2024 | May 14, 2024 | |||||
| Investment Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 4,475,000 | $ 4,068,000 | |||||
| Investment Owned, at Cost | 4,414,000 | 3,997,000 | |||||
| Investment Owned, at Fair Value | $ 4,475,000 | $ 4,054,000 | |||||
| Fair Value As A Percentage of Member's Equity | 13.50% | ||||||
| Percent of net assets | 1.40% | 1.40% | |||||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan, One 05/14/29 | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.48% | 9.48% | 9.48% | 9.48% | |||
| Investment, Acquisition Date | May 14, 2024 | ||||||
| Investment Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | May 14, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 4,027,000 | ||||||
| Investment Owned, at Cost | 3,973,000 | ||||||
| Investment Owned, at Fair Value | $ 4,027,000 | ||||||
| Percent of net assets | 1.60% | 1.60% | 1.60% | 1.60% | |||
| Investment, Identifier [Axis]: PFB Holdco, Inc Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PfbHoldingCompanyLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | |||||
| Investment, Acquisition Date | Dec. 17, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 1 | 1 | |||||
| Investment Owned, at Cost | $ 24,000 | ||||||
| Investment, Identifier [Axis]: PFB Holding Company, LLC Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PFBHoldcoIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||
| Investment, Acquisition Date | Dec. 17, 2021 | ||||||
| Investment Owned, Balance, Shares | shares | 1 | 1 | 1 | 1 | |||
| Investment Owned, at Cost | $ 24,000 | ||||||
| Investment, Identifier [Axis]: PGI Parent LLC (d/b/a Prime Electric, Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PgiParentLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.67% | 8.67% | 8.67% | 8.67% | |||
| Investment, Acquisition Date | Dec. 31, 2025 | ||||||
| Investment Maturity Date | Dec. 31, 2031 | Dec. 31, 2031 | Dec. 31, 2031 | Dec. 31, 2031 | |||
| Investment, Identifier [Axis]: PGI Parent LLC (d/b/a Prime Electric, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PgiParentLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.67% | 8.67% | 8.67% | 8.67% | |||
| Investment, Acquisition Date | Dec. 31, 2025 | ||||||
| Investment Maturity Date | Dec. 31, 2031 | Dec. 31, 2031 | Dec. 31, 2031 | Dec. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 5,077,000 | ||||||
| Investment Owned, at Cost | 5,026,000 | ||||||
| Investment Owned, at Fair Value | $ 5,026,000 | ||||||
| Percent of net assets | 1.90% | 1.90% | 1.90% | 1.90% | |||
| Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PltfrmCompaniesLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 3.00% | 3.00% | |||||
| Spread Above Index | 9.00% | 9.00% | |||||
| Investment Interest Rate | 13.34% | 13.34% | |||||
| Investment, Acquisition Date | Jan. 29, 2024 | ||||||
| Investment Maturity Date | Jan. 29, 2029 | Jan. 29, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 889,000 | ||||||
| Investment Owned, at Cost | 867,000 | ||||||
| Investment Owned, at Fair Value | $ 916,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | |||||
| Investment, Interest Rate, Paid in Cash | 12.34% | 12.34% | |||||
| Percent of net assets | 0.30% | 0.30% | |||||
| Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PltfrmCompaniesLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 3.00% | 3.00% | |||||
| Spread Above Index | 9.00% | 9.00% | |||||
| Investment Interest Rate | 13.36% | 13.36% | |||||
| Investment, Acquisition Date | Jan. 29, 2024 | ||||||
| Investment Maturity Date | Jan. 29, 2029 | Jan. 29, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,950,000 | ||||||
| Investment Owned, at Cost | 7,757,000 | ||||||
| Investment Owned, at Fair Value | $ 8,188,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | |||||
| Investment, Interest Rate, Paid in Cash | 12.36% | 12.36% | |||||
| Percent of net assets | 3.00% | 3.00% | |||||
| Investment, Identifier [Axis]: Patagonia Holdco LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PatagoniaHoldcoLLCMember | whfcl:PatagoniaHoldcoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | Integrated Telecommunication Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.62% | 10.27% | 9.62% | 9.62% | 9.62% | 10.27% | |
| Investment, Acquisition Date | Aug. 05, 2022 | Aug. 05, 2022 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 14,150,000 | $ 14,296,000 | |||||
| Investment Owned, at Cost | 12,839,000 | 12,602,000 | |||||
| Investment Owned, at Fair Value | $ 11,603,000 | $ 13,135,000 | |||||
| Percent of net assets | 4.50% | 4.60% | 4.50% | 4.50% | 4.50% | 4.60% | |
| Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Delayed Draw Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PavementPartnersIntercoLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Mar. 17, 2023 | ||||||
| Investment Maturity Date | Feb. 07, 2028 | Feb. 07, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 569,000 | ||||||
| Investment Owned, at Cost | 558,000 | ||||||
| Investment Owned, at Fair Value | $ 569,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.70% | ||||||
| Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Revolving Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PavementPartnersIntercoLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Mar. 17, 2023 | ||||||
| Investment Maturity Date | Feb. 07, 2028 | Feb. 07, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 338,000 | ||||||
| Investment Owned, at Cost | 331,000 | ||||||
| Investment Owned, at Fair Value | $ 341,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.00% | ||||||
| Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PavementPartnersIntercoLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Mar. 17, 2023 | ||||||
| Investment Maturity Date | Feb. 07, 2028 | Feb. 07, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,117,000 | ||||||
| Investment Owned, at Cost | 5,015,000 | ||||||
| Investment Owned, at Fair Value | $ 5,111,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 14.80% | ||||||
| Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PirtekHoldcoLLCMember | whfcl:PirtekHoldcoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 5.50% | 4.50% | 4.50% | 4.50% | 5.50% | |
| Investment Interest Rate | 8.20% | 9.95% | 8.20% | 8.20% | 8.20% | 9.95% | |
| Investment, Acquisition Date | Oct. 31, 2023 | Oct. 31, 2023 | |||||
| Investment Maturity Date | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | |
| Investment Owned, at Fair Value | $ 9,000 | $ 17,000 | |||||
| Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PirtekHoldcoLLCMember | whfcl:PirtekHoldcoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 5.50% | 4.50% | 4.50% | 4.50% | 5.50% | |
| Investment Interest Rate | 8.20% | 9.95% | 8.20% | 8.20% | 8.20% | 9.95% | |
| Investment, Acquisition Date | Oct. 31, 2023 | Oct. 31, 2023 | |||||
| Investment Maturity Date | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 12,389,000 | $ 7,425,000 | |||||
| Investment Owned, at Cost | 12,284,000 | 7,298,000 | |||||
| Investment Owned, at Fair Value | $ 12,332,000 | $ 7,425,000 | |||||
| Fair Value As A Percentage of Member's Equity | 37.50% | 21.50% | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | whfcl:PlaymonsterGroupEquityIncMember | |||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Acquisition Date | Jan. 24, 2022 | Jan. 24, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 72 | 72 | 72 | 72 | |||
| Investment Owned, Balance, Principal Amount | $ 72,000 | ||||||
| Investment Owned, at Cost | $ 460,000 | $ 460,000 | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | whfcl:PlaymonsterGroupEquityIncMember | |||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Acquisition Date | Jan. 24, 2022 | Jan. 24, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 36 | 36 | 36 | 36 | |||
| Investment Owned, Balance, Principal Amount | $ 36,000 | ||||||
| Investment Owned, at Cost | $ 3,600,000 | $ 3,600,000 | |||||
| Investment, Identifier [Axis]: Playmonster Group LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupLLCMember | whfcl:PlaymonsterGroupLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 9.00% | 9.00% | 9.00% | 9.00% | 9.00% | 9.00% | |
| Investment, Acquisition Date | Jun. 07, 2021 | Jun. 07, 2021 | |||||
| Investment Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 5,595,000 | $ 4,890,000 | |||||
| Investment Owned, at Cost | 3,661,000 | 3,661,000 | |||||
| Investment Owned, at Fair Value | $ 1,729,000 | $ 1,635,000 | 1,363,000 | ||||
| Investment, Interest Rate, Paid in Kind | 12.99% | 13.74% | 12.99% | 12.99% | 12.99% | 13.74% | |
| Percent of net assets | 0.70% | 0.60% | 0.70% | 0.70% | 0.70% | 0.60% | |
| Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupLLCMember | whfcl:PlaymonsterGroupLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment, Acquisition Date | Dec. 09, 2022 | Dec. 09, 2022 | |||||
| Investment Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 1,442,000 | $ 1,289,000 | |||||
| Investment Owned, at Cost | 1,438,000 | 1,275,000 | |||||
| Investment Owned, at Fair Value | $ 1,355,000 | $ 1,172,000 | 1,015,000 | ||||
| Investment, Interest Rate, Paid in Kind | 10.74% | 11.41% | 10.74% | 10.74% | 10.74% | 11.41% | |
| Percent of net assets | 0.50% | 0.40% | 0.50% | 0.50% | 0.50% | 0.40% | |
| Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PowerServiceGroupCrAcquisitionIncMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jul. 11, 2022 | ||||||
| Investment Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,340,000 | ||||||
| Investment Owned, at Cost | 1,329,000 | ||||||
| Investment Owned, at Fair Value | $ 1,354,000 | ||||||
| Percent of net assets | 0.50% | 0.50% | |||||
| Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PowerServiceGroupCrAcquisitionIncMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jun. 25, 2021 | ||||||
| Investment Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,697,000 | ||||||
| Investment Owned, at Cost | 8,642,000 | ||||||
| Investment Owned, at Fair Value | $ 8,784,000 | ||||||
| Percent of net assets | 3.10% | 3.10% | |||||
| Investment, Identifier [Axis]: Pressurized Holdings, LLC Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PressurizedHoldingsLlcMember | whfcl:PressurizedHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | |
| Investment, Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | |||||
| Investment, Identifier [Axis]: Pressurized Holdings, LLC Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PressurizedHoldingsLlcMember | whfcl:PressurizedHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | |
| Investment, Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | |||||
| Investment Owned, at Cost | $ 4,537,000 | $ 4,537,000 | |||||
| Investment Owned, at Fair Value | $ 4,784,000 | $ 1,657,000 | 251,000 | ||||
| Percent of net assets | 1.80% | 0.60% | 1.80% | 1.80% | 1.80% | 0.60% | |
| Investment, Identifier [Axis]: Principal Lighting Group, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PrincipalLightingGroupLlcMember | whfcl:PrincipalLightingGroupLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | whfcl:ElectronicEquipmentAndInstrumentsMember | Electrical Components & Equipment | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | Electrical Components & Equipment | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | |
| Investment Interest Rate | 8.96% | 9.81% | 8.96% | 8.96% | 8.96% | 9.81% | |
| Investment, Acquisition Date | Dec. 03, 2024 | Dec. 03, 2024 | |||||
| Investment Maturity Date | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | |
| Investment Owned, at Fair Value | $ 4,000 | ||||||
| Investment, Identifier [Axis]: Principal Lighting Group, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PrincipalLightingGroupLlcMember | whfcl:PrincipalLightingGroupLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | whfcl:ElectronicEquipmentAndInstrumentsMember | Electrical Components & Equipment | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | whfcl:ElectronicEquipmentAndInstrumentsMember | Electrical Components & Equipment | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | |
| Investment Interest Rate | 8.96% | 9.81% | 8.96% | 8.96% | 8.96% | 9.81% | |
| Investment, Acquisition Date | Dec. 03, 2024 | Dec. 03, 2024 | |||||
| Investment Maturity Date | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | |
| Investment Owned, Balance, Principal Amount | $ 3,353,000 | $ 3,531,000 | |||||
| Investment Owned, at Cost | 3,312,000 | 3,479,000 | |||||
| Investment Owned, at Fair Value | $ 3,343,000 | $ 3,479,000 | |||||
| Fair Value As A Percentage of Member's Equity | 10.20% | 10.10% | |||||
| Investment, Identifier [Axis]: Quest Events, LLC Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | Quest Events, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Acquisition Date | Dec. 28, 2018 | Dec. 28, 2018 | |||||
| Investment Owned, Balance, Shares | shares | 385 | 385 | 385 | 385 | |||
| Investment Owned, Balance, Principal Amount | $ 333,000 | ||||||
| Investment Owned, at Cost | $ 385,000 | 376,000 | |||||
| Investment Owned, at Fair Value | $ 149,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||
| Investment Interest Rate | 11.48% | 11.48% | 11.48% | 11.48% | |||
| Investment, Acquisition Date | Mar. 21, 2025 | ||||||
| Investment Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 124,000 | ||||||
| Investment Owned, at Cost | 122,000 | ||||||
| Investment Owned, at Fair Value | $ 113,000 | ||||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 2.00% | 2.00% | |||||
| Spread Above Index | 7.00% | 7.00% | |||||
| Investment Interest Rate | 11.59% | 11.59% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 247,000 | ||||||
| Investment Owned, at Cost | 246,000 | ||||||
| Investment Owned, at Fair Value | $ 248,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.70% | ||||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | Quest Events, LLC [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.50% | 6.75% | 6.75% | 6.75% | 6.50% | |
| Investment Interest Rate | 10.48% | 10.90% | 10.48% | 10.48% | 10.48% | 10.90% | |
| Investment, Acquisition Date | Sep. 13, 2024 | Sep. 13, 2024 | |||||
| Investment Maturity Date | Sep. 30, 2027 | Sep. 30, 2026 | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 1,270,000 | $ 480,000 | |||||
| Investment Owned, at Cost | 1,258,000 | 472,000 | |||||
| Investment Owned, at Fair Value | $ 1,187,000 | $ 473,000 | |||||
| Percent of net assets | 0.50% | 0.20% | 0.50% | 0.50% | 0.50% | 0.20% | |
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 2.00% | 2.00% | |||||
| Spread Above Index | 7.00% | 7.00% | |||||
| Investment Interest Rate | 11.59% | 11.59% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,592,000 | ||||||
| Investment Owned, at Cost | 11,563,000 | ||||||
| Investment Owned, at Fair Value | $ 11,592,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 33.50% | ||||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Revolving Loan, One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||
| Investment Interest Rate | 11.48% | 11.48% | 11.48% | 11.48% | |||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 288,000 | ||||||
| Investment Owned, at Cost | 288,000 | ||||||
| Investment Owned, at Fair Value | $ 262,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.80% | ||||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Term Loan, One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 2.00% | 2.00% | 2.00% | 2.00% | |||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||
| Investment Interest Rate | 11.48% | 11.48% | 11.48% | 11.48% | |||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||
| Investment Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 11,668,000 | ||||||
| Investment Owned, at Cost | 11,655,000 | ||||||
| Investment Owned, at Fair Value | $ 11,041,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 33.50% | ||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RCKCAcquisitionsLLCMember | whfcl:RCKCAcquisitionsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.25% | 5.50% | 5.50% | 5.50% | 5.25% | |
| Investment Interest Rate | 9.49% | 9.99% | 9.49% | 9.49% | 9.49% | 9.99% | |
| Investment, Acquisition Date | Jan. 27, 2021 | Jan. 27, 2021 | |||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 2,916,000 | $ 2,946,000 | |||||
| Investment Owned, at Cost | 2,898,000 | 2,922,000 | |||||
| Investment Owned, at Fair Value | $ 2,827,000 | $ 2,946,000 | |||||
| Fair Value As A Percentage of Member's Equity | 8.60% | 8.50% | |||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RCKCAcquisitionsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.25% | 5.25% | |||||
| Investment Interest Rate | 9.99% | 9.99% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | |||||
| Investment Owned, at Fair Value | $ 11,000 | ||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RCKCAcquisitionsLLCMember | whfcl:RCKCAcquisitionsLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.25% | 5.50% | 5.50% | 5.50% | 5.25% | |
| Investment Interest Rate | 9.32% | 9.73% | 9.32% | 9.32% | 9.32% | 9.73% | |
| Investment, Acquisition Date | Jan. 27, 2021 | Jan. 27, 2021 | |||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 10,809,000 | $ 10,923,000 | |||||
| Investment Owned, at Cost | 10,747,000 | 10,839,000 | |||||
| Investment Owned, at Fair Value | $ 10,481,000 | $ 10,923,000 | |||||
| Fair Value As A Percentage of Member's Equity | 31.90% | 31.60% | |||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RCKCAcquisitionsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||
| Investment Interest Rate | 9.49% | 9.49% | 9.49% | 9.49% | |||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||
| Investment Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |||
| Investment Owned, at Fair Value | $ (35,000) | ||||||
| Fair Value As A Percentage of Member's Equity | (0.10%) | ||||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RLJPro-VacInc.Member | whfcl:RLJPro-VacInc.Member | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.25% | 6.75% | 6.75% | 6.75% | 6.25% | |
| Investment Interest Rate | 10.72% | 10.71% | 10.72% | 10.72% | 10.72% | 10.71% | |
| Investment, Acquisition Date | Jan. 23, 2024 | Jan. 23, 2024 | |||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 6,592,000 | $ 6,659,000 | |||||
| Investment Owned, at Cost | 6,546,000 | 6,566,000 | |||||
| Investment Owned, at Fair Value | $ 6,396,000 | $ 6,637,000 | |||||
| Fair Value As A Percentage of Member's Equity | 19.50% | 19.20% | |||||
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.76% | 9.76% | 9.76% | 9.76% | |||
| Investment, Acquisition Date | Dec. 05, 2025 | ||||||
| Investment Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |||
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.82% | 9.82% | 9.82% | 9.82% | |||
| Investment, Acquisition Date | Dec. 05, 2025 | ||||||
| Investment Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 638,000 | ||||||
| Investment Owned, at Cost | 627,000 | ||||||
| Investment Owned, at Fair Value | $ 627,000 | ||||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | |||
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 9.76% | 9.76% | 9.76% | 9.76% | |||
| Investment, Acquisition Date | Dec. 05, 2025 | ||||||
| Investment Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 10,213,000 | ||||||
| Investment Owned, at Cost | 10,036,000 | ||||||
| Investment Owned, at Fair Value | $ 10,034,000 | ||||||
| Percent of net assets | 3.90% | 3.90% | 3.90% | 3.90% | |||
| Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Ribbon Communications Operating Company, Inc. [Member] | Ribbon Communications Operating Company, Inc. [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 9.97% | 10.59% | 9.97% | 9.97% | 9.97% | 10.59% | |
| Investment, Acquisition Date | Jun. 21, 2024 | Jun. 21, 2024 | |||||
| Investment Maturity Date | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | |
| Investment Owned, at Fair Value | $ 12,000 | $ 9,000 | |||||
| Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Ribbon Communications Operating Company, Inc. [Member] | Ribbon Communications Operating Company, Inc. [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 9.97% | 10.59% | 9.97% | 9.97% | 9.97% | 10.59% | |
| Investment, Acquisition Date | Jun. 21, 2024 | Jun. 21, 2024 | |||||
| Investment Maturity Date | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 8,602,000 | $ 8,756,000 | |||||
| Investment Owned, at Cost | 8,483,000 | 8,600,000 | |||||
| Investment Owned, at Fair Value | $ 8,631,000 | $ 8,692,000 | |||||
| Percent of net assets | 3.30% | 3.00% | 3.30% | 3.30% | 3.30% | 3.00% | |
| Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:Ross-SimonsTopcoLPMember | whfcl:Ross-SimonsTopcoLPMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | Broadline Retail | |
| Investment, Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | |||||
| Investment Owned, Balance, Shares | shares | 600 | 600 | 600 | 600 | 600 | 600 | |
| Investment Owned, at Cost | $ 514,000 | $ 514,000 | |||||
| Investment Owned, at Fair Value | $ 735,000 | $ 756,000 | |||||
| Percent of net assets | 0.30% | 0.30% | 0.30% | 0.30% | 0.30% | 0.30% | |
| Investment, Identifier [Axis]: SCIC Buyer, Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ScicBuyerInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Jun. 04, 2025 | ||||||
| Investment Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 295,000 | ||||||
| Investment Owned, at Cost | 293,000 | ||||||
| Investment Owned, at Fair Value | $ 319,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.00% | ||||||
| Investment, Identifier [Axis]: SCIC Buyer, Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ScicBuyerInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Jun. 04, 2025 | ||||||
| Investment Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |||
| Investment Owned, at Fair Value | $ 25,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 0.10% | ||||||
| Investment, Identifier [Axis]: SCIC Buyer, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ScicBuyerInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Jun. 04, 2025 | ||||||
| Investment Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 9,090,000 | ||||||
| Investment Owned, at Cost | 8,970,000 | ||||||
| Investment Owned, at Fair Value | $ 9,142,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 27.80% | ||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.00% | 8.00% | 8.00% | 8.00% | |||
| Investment Interest Rate | 11.82% | 11.82% | 11.82% | 11.82% | |||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 1,652,000 | ||||||
| Investment Owned, at Cost | 1,637,000 | ||||||
| Investment Owned, at Fair Value | $ 1,653,000 | ||||||
| Percent of net assets | 0.60% | 0.60% | 0.60% | 0.60% | |||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.00% | 8.00% | 8.00% | 8.00% | |||
| Investment Interest Rate | 11.82% | 11.82% | 11.82% | 11.82% | |||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||
| Investment Owned, at Fair Value | $ 8,000 | ||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 8.00% | 8.00% | 8.00% | 8.00% | |||
| Investment Interest Rate | 11.82% | 11.82% | 11.82% | 11.82% | |||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 5,032,000 | ||||||
| Investment Owned, at Cost | 4,974,000 | ||||||
| Investment Owned, at Fair Value | $ 5,021,000 | ||||||
| Percent of net assets | 1.90% | 1.90% | 1.90% | 1.90% | |||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.46% | 12.46% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,669,000 | ||||||
| Investment Owned, at Cost | 1,641,000 | ||||||
| Investment Owned, at Fair Value | $ 1,672,000 | ||||||
| Percent of net assets | 0.60% | 0.60% | |||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.46% | 12.46% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, at Fair Value | $ 13,000 | ||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 8.00% | 8.00% | |||||
| Investment Interest Rate | 12.46% | 12.46% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,076,000 | ||||||
| Investment Owned, at Cost | 4,988,000 | ||||||
| Investment Owned, at Fair Value | $ 5,063,000 | ||||||
| Percent of net assets | 1.80% | 1.80% | |||||
| Investment, Identifier [Axis]: Salon Republic Investments LLC, Common Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicInvestmentsLlcMember | whfcl:SalonRepublicInvestmentsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |
| Investment, Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 400 | 400 | 400 | 400 | |||
| Investment Owned, Balance, Principal Amount | $ 400,000 | ||||||
| Investment Owned, at Cost | $ 400,000 | 400,000 | |||||
| Investment Owned, at Fair Value | $ 6,000 | $ 132,000 | |||||
| Investment, Identifier [Axis]: Salon Republic Investments LLC, Preferred Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicInvestmentsLlcMember | whfcl:SalonRepublicInvestmentsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |
| Investment, Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | |||||
| Investment Owned, Balance, Shares | shares | 200 | 200 | 200 | 200 | |||
| Investment Owned, Balance, Principal Amount | $ 200,000 | ||||||
| Investment Owned, at Cost | $ 200,000 | 200,000 | |||||
| Investment Owned, at Fair Value | $ 265,000 | $ 242,000 | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | |
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SleepOpCoLLCMember | whfcl:SleepOpCoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 6.50% | 5.50% | 5.50% | 5.50% | 6.50% | |
| Investment Interest Rate | 9.37% | 11.28% | 9.37% | 9.37% | 9.37% | 11.28% | |
| Investment, Acquisition Date | Nov. 07, 2025 | Oct. 12, 2021 | |||||
| Investment Maturity Date | Nov. 07, 2030 | Oct. 12, 2026 | Nov. 07, 2030 | Nov. 07, 2030 | Nov. 07, 2030 | Oct. 12, 2026 | |
| Investment Owned, at Fair Value | $ 5,000 | ||||||
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SleepOpCoLLCMember | whfcl:SleepOpCoLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 6.50% | 5.50% | 5.50% | 5.50% | 6.50% | |
| Investment Interest Rate | 9.37% | 11.28% | 9.37% | 9.37% | 9.37% | 11.28% | |
| Investment, Acquisition Date | Nov. 07, 2025 | Oct. 12, 2021 | |||||
| Investment Maturity Date | Nov. 07, 2030 | Oct. 12, 2026 | Nov. 07, 2030 | Nov. 07, 2030 | Nov. 07, 2030 | Oct. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 13,455,000 | $ 22,590,000 | |||||
| Investment Owned, at Cost | 13,259,000 | 22,401,000 | |||||
| Investment Owned, at Fair Value | $ 13,255,000 | $ 22,441,000 | |||||
| Percent of net assets | 5.10% | 7.80% | 5.10% | 5.10% | 5.10% | 7.80% | |
| Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SmaltoInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate One Month Term [Member] | Euro Interbank Offered Rate One Month Term [Member] | Euro Interbank Offered Rate One Month Term [Member] | Euro Interbank Offered Rate One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | |||
| Investment Interest Rate | 7.90% | 7.90% | 7.90% | 7.90% | |||
| Investment, Acquisition Date | May 04, 2022 | ||||||
| Investment Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |||
| Investment Owned, Balance, Principal Amount | € | € 6,198 | ||||||
| Investment Owned, at Cost | $ 6,480,000 | ||||||
| Investment Owned, at Fair Value | $ 7,281,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 22.10% | ||||||
| Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan One | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SmaltoInc.Member | whfcl:SmaltoInc.Member | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.57% | 10.21% | 9.57% | 9.57% | 9.57% | 10.21% | |
| Investment, Acquisition Date | May 04, 2022 | May 04, 2022 | |||||
| Investment Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 944,000 | $ 978,000 | |||||
| Investment Owned, at Cost | 936,000 | 967,000 | |||||
| Investment Owned, at Fair Value | $ 944,000 | $ 978,000 | |||||
| Fair Value As A Percentage of Member's Equity | 2.90% | 2.80% | |||||
| Investment, Identifier [Axis]: Smalto Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SmaltoInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:EuroInterbankOfferedRateMember | whfcl:EuroInterbankOfferedRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.00% | 6.00% | |||||
| Investment Interest Rate | 8.86% | 8.86% | |||||
| Investment, Acquisition Date | May 04, 2022 | ||||||
| Investment Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,423,000 | ||||||
| Investment Owned, at Cost | 6,682,000 | ||||||
| Investment Owned, at Fair Value | $ 6,654,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 19.20% | ||||||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | |||||
| Investment, Type [Extensible Enumeration] | us-gaap:CommonClassAMember | whfcl:ClassCommonStockMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | whfcl:ClassCommonStockMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||
| Investment Owned, Balance, Shares | shares | 2 | 2 | 2 | 2 | |||
| Investment Owned, Balance, Principal Amount | $ 2,000 | ||||||
| Investment Owned, at Cost | $ 1,941,000 | 1,941,000 | |||||
| Investment Owned, at Fair Value | $ 507,000 | $ 173,000 | |||||
| Percent of net assets | 0.20% | 0.10% | 0.20% | 0.20% | 0.20% | 0.10% | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |||
| Investment Owned, Balance, Principal Amount | $ 2,098,000 | $ 1,822,000 | |||||
| Investment Owned, at Cost | 2,095,000 | 1,819,000 | |||||
| Investment Owned, at Fair Value | $ 2,098,000 | $ 1,790,000 | |||||
| Investment, Interest Rate, Paid in Kind | 9.50% | 9.50% | 9.50% | 9.50% | |||
| Percent of net assets | 0.80% | 0.60% | 0.80% | 0.80% | 0.80% | 0.60% | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | |||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||
| Investment Owned, Balance, Shares | shares | 1 | 1 | 1 | 1 | |||
| Investment Owned, Balance, Principal Amount | $ 1,000 | ||||||
| Investment Owned, at Cost | $ 793,000 | 793,000 | |||||
| Investment Owned, at Fair Value | $ 205,000 | $ 70,000 | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SourceCodeHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,872,000 | ||||||
| Investment Owned, at Cost | 3,839,000 | ||||||
| Investment Owned, at Fair Value | $ 3,854,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 11.10% | ||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SourceCodeHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.96% | 10.96% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 14,162,000 | ||||||
| Investment Owned, at Cost | 14,041,000 | ||||||
| Investment Owned, at Fair Value | $ 14,095,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 40.70% | ||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SourceCodeHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 3,831,000 | ||||||
| Investment Owned, at Cost | 3,811,000 | ||||||
| Investment Owned, at Fair Value | $ 3,831,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 11.70% | ||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SourceCodeHoldingsLLCMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.32% | 10.32% | 10.32% | 10.32% | |||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||
| Investment Owned, Balance, Principal Amount | $ 14,009,000 | ||||||
| Investment Owned, at Cost | 13,935,000 | ||||||
| Investment Owned, at Fair Value | $ 14,009,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 42.60% | ||||||
| Investment, Identifier [Axis]: Sterling Pure Blocker, LLC (d/b/a Banner Industries, Inc.) Class B Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SterlingPureBlockerLlcMember | whfcl:SterlingPureBlockerLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Acquisition Date | Dec. 01, 2023 | Dec. 01, 2023 | |||||
| Investment Owned, Balance, Shares | shares | 404 | 404 | 404 | 404 | |||
| Investment Owned, Balance, Principal Amount | $ 404,000 | ||||||
| Investment Owned, at Cost | $ 404,000 | 404,000 | |||||
| Investment Owned, at Fair Value | $ 57,000 | $ 388,000 | |||||
| Percent of net assets | 0.10% | 0.10% | |||||
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Surge Amuze Holdings Inc [Member] | Surge Amuze Holdings Inc [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.00% | 6.25% | 6.25% | 6.25% | 6.00% | |
| Investment Interest Rate | 9.99% | 10.46% | 9.99% | 9.99% | 9.99% | 10.46% | |
| Investment, Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | |||||
| Investment Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,002,000 | $ 584,000 | |||||
| Investment Owned, at Cost | 987,000 | 573,000 | |||||
| Investment Owned, at Fair Value | $ 1,000,000 | $ 577,000 | |||||
| Percent of net assets | 0.40% | 0.20% | 0.40% | 0.40% | 0.40% | 0.20% | |
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Surge Amuze Holdings Inc [Member] | Surge Amuze Holdings Inc [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Prime Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Prime Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.90% | 5.00% | 5.90% | 5.90% | 5.90% | 5.00% | |
| Investment Interest Rate | 10.82% | 12.50% | 10.82% | 10.82% | 10.82% | 12.50% | |
| Investment, Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | |||||
| Investment Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 451,000 | $ 585,000 | |||||
| Investment Owned, at Cost | 444,000 | 574,000 | |||||
| Investment Owned, at Fair Value | $ 450,000 | $ 576,000 | |||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | 0.20% | |
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Surge Amuze Holdings Inc [Member] | Surge Amuze Holdings Inc [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.00% | 6.25% | 6.25% | 6.25% | 6.00% | |
| Investment Interest Rate | 9.99% | 10.44% | 9.99% | 9.99% | 9.99% | 10.44% | |
| Investment, Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | |||||
| Investment Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 5,679,000 | $ 5,737,000 | |||||
| Investment Owned, at Cost | 5,596,000 | 5,629,000 | |||||
| Investment Owned, at Fair Value | $ 5,645,000 | $ 5,643,000 | |||||
| Percent of net assets | 2.20% | 2.00% | 2.20% | 2.20% | 2.20% | 2.00% | |
| Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Netevia Group LLC) First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Tot Group, Inc. [Member] | Tot Group, Inc. [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.25% | 7.50% | 7.25% | 7.25% | 7.25% | 7.50% | |
| Investment Interest Rate | 10.92% | 11.83% | 10.92% | 10.92% | 10.92% | 11.83% | |
| Investment, Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | |||||
| Investment Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,103,000 | ||||||
| Investment Owned, at Cost | 1,084,000 | ||||||
| Investment Owned, at Fair Value | $ 1,091,000 | $ (1,000) | |||||
| Percent of net assets | 0.40% | 0.40% | 0.40% | 0.40% | |||
| Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Netevia Group LLC) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Tot Group, Inc. [Member] | Tot Group, Inc. [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.25% | 7.50% | 7.25% | 7.25% | 7.25% | 7.50% | |
| Investment Interest Rate | 10.92% | 11.83% | 10.92% | 10.92% | 10.92% | 11.83% | |
| Investment, Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | |||||
| Investment Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Investment Owned, at Fair Value | $ 1,000 | ||||||
| Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Netevia Group LLC) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Tot Group, Inc. [Member] | Tot Group, Inc. [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | Transaction & Payment Processing Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.25% | 7.50% | 7.25% | 7.25% | 7.25% | 7.50% | |
| Investment Interest Rate | 10.92% | 11.83% | 10.92% | 10.92% | 10.92% | 11.83% | |
| Investment, Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | |||||
| Investment Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 9,146,000 | $ 8,239,000 | |||||
| Investment Owned, at Cost | 9,000,000 | 8,074,000 | |||||
| Investment Owned, at Fair Value | $ 9,023,000 | $ 8,067,000 | |||||
| Percent of net assets | 3.40% | 2.80% | 3.40% | 3.40% | 3.40% | 2.80% | |
| Investment, Identifier [Axis]: TVG I-EMSI Parent, LLC Class A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TvgIEmsiParentLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |||
| Investment, Acquisition Date | Sep. 01, 2025 | ||||||
| Investment Owned, Balance, Principal Amount | $ 20,765,000 | ||||||
| Investment, Identifier [Axis]: TVG I-EMSI Parent, LLC Class B Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TvgIEmsiParentLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |||
| Investment, Acquisition Date | Sep. 01, 2025 | ||||||
| Investment Owned, Balance, Principal Amount | $ 2,000 | ||||||
| Investment Owned, at Cost | 3,291,000 | ||||||
| Investment Owned, at Fair Value | $ 3,291,000 | ||||||
| Percent of net assets | 1.30% | 1.30% | 1.30% | 1.30% | |||
| Investment, Identifier [Axis]: TableTrust Brands LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TabletrustBrandsLlcMember | whfcl:TabletrustBrandsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 9.57% | 10.22% | 9.57% | 9.57% | 9.57% | 10.22% | |
| Investment, Acquisition Date | Dec. 24, 2024 | Dec. 24, 2024 | |||||
| Investment Maturity Date | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 2,480,000 | $ 2,505,000 | |||||
| Investment Owned, at Cost | 2,453,000 | 2,468,000 | |||||
| Investment Owned, at Fair Value | $ 2,480,000 | $ 2,468,000 | |||||
| Fair Value As A Percentage of Member's Equity | 7.50% | 7.10% | |||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 9.75% | 6.25% | 6.25% | 6.25% | 9.75% | |
| Investment, Acquisition Date | Jun. 07, 2025 | Oct. 15, 2020 | |||||
| Investment Maturity Date | Jun. 07, 2028 | Oct. 15, 2025 | Jun. 07, 2028 | Jun. 07, 2028 | Jun. 07, 2028 | Oct. 15, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 1,116,000 | ||||||
| Investment Owned, at Cost | 1,051,000 | ||||||
| Investment Owned, at Fair Value | $ 20,000 | $ 1,009,000 | |||||
| Investment, Interest Rate, Paid in Kind | 10.19% | 14.21% | 10.19% | 10.19% | 10.19% | 14.21% | |
| Percent of net assets | 0.40% | 0.40% | |||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 9.75% | 6.25% | 6.25% | 6.25% | 9.75% | |
| Investment, Acquisition Date | Jun. 07, 2025 | Oct. 15, 2020 | |||||
| Investment Maturity Date | Jun. 07, 2028 | Oct. 15, 2025 | Jun. 07, 2028 | Jun. 07, 2028 | Jun. 07, 2028 | Oct. 15, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 11,437,000 | $ 18,547,000 | |||||
| Investment Owned, at Cost | 11,437,000 | 17,496,000 | |||||
| Investment Owned, at Fair Value | $ 11,437,000 | $ 17,063,000 | |||||
| Investment, Interest Rate, Paid in Kind | 10.19% | 14.21% | 10.19% | 10.19% | 10.19% | 14.21% | |
| Percent of net assets | 4.40% | 5.90% | 4.40% | 4.40% | 4.40% | 5.90% | |
| Investment, Identifier [Axis]: Telestream Topco 2 LLC (d/b/a Telestream Holdings Corporation) Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TelestreamTopco2LlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||
| Investment, Acquisition Date | Jun. 07, 2025 | ||||||
| Investment Owned, Balance, Principal Amount | $ 497,000 | ||||||
| Investment Owned, at Cost | 7,109,000 | ||||||
| Investment Owned, at Fair Value | $ 8,027,000 | ||||||
| Percent of net assets | 3.10% | 3.10% | 3.10% | 3.10% | |||
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.23% | 10.23% | 10.23% | 10.23% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |||
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.23% | 10.23% | 10.23% | 10.23% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 104,000 | ||||||
| Investment Owned, at Cost | 100,000 | ||||||
| Investment Owned, at Fair Value | $ 100,000 | ||||||
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.23% | 10.23% | 10.23% | 10.23% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |||
| Investment Owned, Balance, Principal Amount | $ 11,128,000 | ||||||
| Investment Owned, at Cost | 10,778,000 | ||||||
| Investment Owned, at Fair Value | $ 10,776,000 | ||||||
| Percent of net assets | 4.10% | 4.10% | 4.10% | 4.10% | |||
| Investment, Identifier [Axis]: Texas Express Wash, LLC Second Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment Interest Rate | 14.00% | 14.00% | 14.00% | 14.00% | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 1,569,000 | ||||||
| Investment Owned, at Cost | 1,436,000 | ||||||
| Investment Owned, at Fair Value | $ 1,435,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 7.00% | 7.00% | 7.00% | 7.00% | |||
| Investment, Interest Rate, Paid in Cash | 7.00% | 7.00% | 7.00% | 7.00% | |||
| Percent of net assets | 0.60% | 0.60% | 0.60% | 0.60% | |||
| Investment, Identifier [Axis]: Texas Wash Holdings, LLC (d/b/a ClearWater Express Wash) Warrants | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasWashHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |||
| Investment, Acquisition Date | Nov. 26, 2025 | ||||||
| Investment Owned, at Cost | $ 197,000 | ||||||
| Investment Owned, at Fair Value | $ 197,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities | Water Utilities | Water Utilities | Water Utilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.90% | 8.90% | 8.90% | 8.90% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 802,000 | ||||||
| Investment Owned, at Cost | 793,000 | ||||||
| Investment Owned, at Fair Value | $ 806,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 2.50% | ||||||
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities | Water Utilities | Water Utilities | Water Utilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.84% | 8.84% | 8.84% | 8.84% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 312,000 | ||||||
| Investment Owned, at Cost | 308,000 | ||||||
| Investment Owned, at Fair Value | $ 317,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 1.00% | ||||||
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities | Water Utilities | Water Utilities | Water Utilities | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Investment Interest Rate | 8.84% | 8.84% | 8.84% | 8.84% | |||
| Investment, Acquisition Date | Mar. 05, 2025 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 4,049,000 | ||||||
| Investment Owned, at Cost | 3,998,000 | ||||||
| Investment Owned, at Fair Value | $ 4,049,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 12.20% | ||||||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TheKyjenCompanyLLCMember | whfcl:TheKyjenCompanyLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 6.50% | 7.50% | 7.50% | 7.50% | 6.50% | |
| Investment Interest Rate | 11.61% | 10.97% | 11.61% | 11.61% | 11.61% | 10.97% | |
| Investment, Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||
| Investment Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 798,000 | ||||||
| Investment Owned, at Cost | 795,000 | ||||||
| Investment Owned, at Fair Value | $ (132,000) | $ 761,000 | |||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 0.75% | 1.00% | 1.00% | 1.00% | 0.75% | |
| Investment, Interest Rate, Paid in Cash | 10.61% | 10.22% | 10.61% | 10.61% | 10.61% | 10.22% | |
| Percent of net assets | (0.10%) | 0.30% | (0.10%) | (0.10%) | (0.10%) | 0.30% | |
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TheKyjenCompanyLLCMember | whfcl:TheKyjenCompanyLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | 7.50% | 7.50% | 7.25% | |
| Investment Interest Rate | 11.61% | 12.05% | 11.61% | 11.61% | 11.61% | 12.05% | |
| Investment, Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||
| Investment Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,409,000 | $ 11,350,000 | |||||
| Investment Owned, at Cost | 11,400,000 | 11,309,000 | |||||
| Investment Owned, at Fair Value | $ 9,790,000 | $ 10,895,000 | |||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 0.75% | 1.00% | 1.00% | 1.00% | 0.75% | |
| Investment, Interest Rate, Paid in Cash | 10.61% | 11.30% | 10.61% | 10.61% | 10.61% | 11.30% | |
| Percent of net assets | 3.80% | 3.80% | 3.80% | 3.80% | 3.80% | 3.80% | |
| Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TokenBuyerIncMember | whfcl:TokenBuyerIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | |
| Investment Interest Rate | 9.99% | 10.74% | 9.99% | 9.99% | 9.99% | 10.74% | |
| Investment, Acquisition Date | May 26, 2022 | May 26, 2022 | |||||
| Investment Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 1,587,000 | $ 7,070,000 | |||||
| Investment Owned, at Cost | 1,363,000 | 6,709,000 | |||||
| Investment Owned, at Fair Value | $ 1,199,000 | $ 5,658,000 | |||||
| Percent of net assets | 0.50% | 2.00% | 0.50% | 0.50% | 0.50% | 2.00% | |
| Investment, Identifier [Axis]: Trailhead Media LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Trailhead Media L L C [Member] | Trailhead Media L L C [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 9.17% | 9.82% | 9.17% | 9.17% | 9.17% | 9.82% | |
| Investment, Acquisition Date | Jan. 22, 2025 | Dec. 30, 2024 | |||||
| Investment Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Investment Owned, at Fair Value | $ (3,000) | ||||||
| Investment, Interest Rate, Paid in Kind | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Investment, Interest Rate, Paid in Cash | 8.42% | 9.07% | 8.42% | 8.42% | 8.42% | 9.07% | |
| Investment, Identifier [Axis]: Trailhead Media LLC, First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Trailhead Media L L C [Member] | Trailhead Media L L C [Member] | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 9.17% | 9.82% | 9.17% | 9.17% | 9.17% | 9.82% | |
| Investment, Acquisition Date | Jan. 22, 2025 | Dec. 30, 2024 | |||||
| Investment Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Investment Owned, at Fair Value | $ (3,000) | ||||||
| Investment, Interest Rate, Paid in Kind | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Investment, Interest Rate, Paid in Cash | 8.42% | 9.07% | 8.42% | 8.42% | 8.42% | 9.07% | |
| Investment, Identifier [Axis]: Trailhead Media LLC, First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | Trailhead Media L L C [Member] | Trailhead Media L L C [Member] | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 9.17% | 9.82% | 9.17% | 9.17% | 9.17% | 9.82% | |
| Investment, Acquisition Date | Jan. 22, 2025 | Dec. 30, 2024 | |||||
| Investment Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 6,632,000 | $ 6,648,000 | |||||
| Investment Owned, at Cost | 6,553,000 | 6,548,000 | |||||
| Investment Owned, at Fair Value | $ 6,532,000 | $ 6,548,000 | |||||
| Investment, Interest Rate, Paid in Kind | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Investment, Interest Rate, Paid in Cash | 8.42% | 9.07% | 8.42% | 8.42% | 8.42% | 9.07% | |
| Fair Value As A Percentage of Member's Equity | 19.90% | ||||||
| Percent of net assets | 2.30% | 2.30% | |||||
| Investment, Identifier [Axis]: Transervice Holdings, Inc. (d/b/a Transervice Logistics, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TranserviceHoldingsIncMember | whfcl:TranserviceHoldingsIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% | |
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Investment Interest Rate | 11.07% | 11.71% | 11.07% | 11.07% | 11.07% | 11.71% | |
| Investment, Acquisition Date | Jun. 29, 2023 | Jun. 29, 2023 | |||||
| Investment Maturity Date | Jun. 29, 2028 | Jun. 29, 2028 | Jun. 29, 2028 | Jun. 29, 2028 | Jun. 29, 2028 | Jun. 29, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 7,701,000 | $ 8,663,000 | |||||
| Investment Owned, at Cost | 7,586,000 | 8,481,000 | |||||
| Investment Owned, at Fair Value | $ 7,701,000 | $ 8,715,000 | |||||
| Percent of net assets | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% | |
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrimliteBuyerLLCMember | whfcl:TrimliteBuyerLLCMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | country:CA | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | country:CA | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Overnight Repo Rate Average Three Months Term [Member] | whfcl:CanadianOvernightRepoRateAverageMember | Canadian Overnight Repo Rate Average Three Months Term [Member] | Canadian Overnight Repo Rate Average Three Months Term [Member] | Canadian Overnight Repo Rate Average Three Months Term [Member] | whfcl:CanadianOvernightRepoRateAverageMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 6.50% | 5.50% | 5.50% | 5.50% | 6.50% | |
| Investment Interest Rate | 8.08% | 9.99% | 8.08% | 8.08% | 8.08% | 9.99% | |
| Investment, Acquisition Date | Jul. 27, 2021 | Jul. 27, 2021 | |||||
| Investment Maturity Date | Jul. 27, 2027 | Jul. 27, 2027 | Jul. 27, 2027 | Jul. 27, 2027 | Jul. 27, 2027 | Jul. 27, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 18,868 | $ 18,984 | |||||
| Investment Owned, at Cost | $ 14,957 | 15,006 | |||||
| Investment Owned, at Fair Value | $ 13,748,000 | $ 13,206 | |||||
| Percent of net assets | 5.30% | 4.60% | 5.30% | 5.30% | 5.30% | 4.60% | |
| Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TriplepointAcquisitionHoldingsLlcMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.50% | 5.50% | |||||
| Investment Interest Rate | 9.83% | 9.83% | |||||
| Investment, Acquisition Date | Jun. 14, 2024 | ||||||
| Investment Maturity Date | May 31, 2029 | May 31, 2029 | |||||
| Investment Owned, at Fair Value | $ 9,000 | ||||||
| Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TriplepointAcquisitionHoldingsLlcMember | whfcl:TriplepointAcquisitionHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.50% | 5.25% | 5.25% | 5.25% | 5.50% | |
| Investment Interest Rate | 8.92% | 9.83% | 8.92% | 8.92% | 8.92% | 9.83% | |
| Investment, Acquisition Date | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Investment Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | |
| Investment Owned, at Fair Value | $ 18,000 | $ 12,000 | |||||
| Fair Value As A Percentage of Member's Equity | 0.10% | ||||||
| Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TriplepointAcquisitionHoldingsLlcMember | whfcl:TriplepointAcquisitionHoldingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.50% | 5.25% | 5.25% | 5.25% | 5.50% | |
| Investment Interest Rate | 8.92% | 9.83% | 8.92% | 8.92% | 8.92% | 9.83% | |
| Investment, Acquisition Date | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Investment Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 8,093,000 | $ 5,349,000 | |||||
| Investment Owned, at Cost | 7,975,000 | 5,254,000 | |||||
| Investment Owned, at Fair Value | $ 8,107,000 | $ 5,338,000 | |||||
| Fair Value As A Percentage of Member's Equity | 24.70% | 15.40% | |||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc.First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.21% | 10.21% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, at Fair Value | $ 4,000 | ||||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc.First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.21% | 10.21% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,964,000 | ||||||
| Investment Owned, at Cost | 5,924,000 | ||||||
| Investment Owned, at Fair Value | $ 5,964,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 17.20% | ||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.57% | 9.57% | 9.57% | 9.57% | |||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | |||
| Investment Owned, at Fair Value | $ 2,000 | ||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||
| Investment Interest Rate | 9.57% | 9.57% | 9.57% | 9.57% | |||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||
| Investment Maturity Date | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | |||
| Investment Owned, Balance, Principal Amount | $ 5,902,000 | ||||||
| Investment Owned, at Cost | 5,885,000 | ||||||
| Investment Owned, at Fair Value | $ 5,902,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 18.00% | ||||||
| Investment, Identifier [Axis]: Twin Ridge CRS, LP (d/b/a CRS OneSource) Class A Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TwinRidgeCrsLpMember | whfcl:TwinRidgeCrsLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Food Distributors | Food Distributors | Food Distributors | Food Distributors | Food Distributors | Food Distributors | |
| Investment, Acquisition Date | May 10, 2024 | May 10, 2024 | |||||
| Investment Owned, Balance, Shares | shares | 63 | 63 | 63 | 63 | |||
| Investment Owned, Balance, Principal Amount | $ 63,000 | ||||||
| Investment Owned, at Cost | $ 317,000 | 317,000 | |||||
| Investment Owned, at Fair Value | $ 264,000 | $ 350,000 | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | |
| Investment, Identifier [Axis]: UserZoom Technologies, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:UserzoomTechnologiesIncMember | whfcl:UserzoomTechnologiesIncMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | |
| Investment Interest Rate | 11.63% | 12.75% | 11.63% | 11.63% | 11.63% | 12.75% | |
| Investment, Acquisition Date | Jan. 12, 2023 | Jan. 12, 2023 | |||||
| Investment Maturity Date | Apr. 05, 2029 | Apr. 05, 2029 | Apr. 05, 2029 | Apr. 05, 2029 | Apr. 05, 2029 | Apr. 05, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 9,819,000 | $ 9,819,000 | |||||
| Investment Owned, at Cost | 9,665,000 | 9,618,000 | |||||
| Investment Owned, at Fair Value | $ 9,621,000 | $ 9,809,000 | |||||
| Percent of net assets | 3.70% | 3.40% | 3.70% | 3.70% | 3.70% | 3.40% | |
| Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Preferred Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:VistriaBlockedMgtInvestorLpMember | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||
| Investment, Acquisition Date | Apr. 10, 2023 | ||||||
| Investment Owned, at Fair Value | $ 15,000 | ||||||
| Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Series A Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:VistriaBlockedMgtInvestorLpMember | whfcl:VistriaBlockedMgtInvestorLpMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Acquisition Date | Apr. 10, 2023 | Apr. 10, 2023 | |||||
| Investment Owned, at Cost | $ 314,000 | ||||||
| Investment Owned, at Fair Value | $ 308,000 | $ 493,000 | |||||
| Percent of net assets | 0.10% | 0.20% | 0.10% | 0.10% | 0.10% | 0.20% | |
| Investment, Identifier [Axis]: W Electric Intermediate Holdings, LLC (d/b/a Westinghouse Electric Corporation) - First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | W Electric Intermediate Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.86% | 10.86% | |||||
| Investment, Acquisition Date | Aug. 15, 2024 | ||||||
| Investment Maturity Date | Aug. 15, 2029 | Aug. 15, 2029 | |||||
| Investment Owned, at Fair Value | $ 9,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | |||||
| Investment, Interest Rate, Paid in Cash | 9.86% | 9.86% | |||||
| Investment, Identifier [Axis]: W Electric Intermediate Holdings, LLC (d/b/a Westinghouse Electric Corporation) - First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | W Electric Intermediate Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whfcl:SecuredOvernightFinancingRateMember | whfcl:SecuredOvernightFinancingRateMember | |||||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | |||||
| Spread Above Index | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.86% | 10.86% | |||||
| Investment, Acquisition Date | Aug. 15, 2024 | ||||||
| Investment Maturity Date | Aug. 15, 2029 | Aug. 15, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 12,322,000 | ||||||
| Investment Owned, at Cost | 12,124,000 | ||||||
| Investment Owned, at Fair Value | $ 12,216,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | |||||
| Investment, Interest Rate, Paid in Cash | 9.86% | 9.86% | |||||
| Percent of net assets | 4.30% | 4.30% | |||||
| Investment, Identifier [Axis]: W Electric Intermediate Holdings, LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | W Electric Intermediate Holdings, LLC [Member] | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||
| Investment Interest Rate | 10.22% | 10.22% | 10.22% | 10.22% | |||
| Investment, Acquisition Date | Aug. 15, 2024 | ||||||
| Investment Maturity Date | Aug. 15, 2029 | Aug. 15, 2029 | Aug. 15, 2029 | Aug. 15, 2029 | |||
| Investment Owned, Balance, Principal Amount | $ 12,308,000 | ||||||
| Investment Owned, at Cost | 12,154,000 | ||||||
| Investment Owned, at Fair Value | $ 12,334,000 | ||||||
| Investment, Interest Rate, Paid in Kind | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Investment, Interest Rate, Paid in Cash | 9.22% | 9.22% | 9.22% | 9.22% | |||
| Percent of net assets | 4.70% | 4.70% | 4.70% | 4.70% | |||
| Investment, Identifier [Axis]: WCHG Buyer, Inc. First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WchgBuyerInc.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.47% | 8.47% | 8.47% | 8.47% | |||
| Investment, Acquisition Date | Apr. 01, 2025 | ||||||
| Investment Maturity Date | Apr. 10, 2031 | Apr. 10, 2031 | Apr. 10, 2031 | Apr. 10, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 6,948,000 | ||||||
| Investment Owned, at Cost | 6,918,000 | ||||||
| Investment Owned, at Fair Value | $ 6,948,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 21.10% | ||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | |||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |
| Investment Owned, at Fair Value | $ 21,602,000 | $ 22,741,000 | 22,782,000 | ||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WHFSTRSOhioSeniorLoanFundMember | whfcl:WHFSTRSOhioSeniorLoanFundMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||
| Investment Owned, Balance, Shares | shares | 21,104 | 21,104 | 21,104 | 21,104 | |||
| Investment Owned, Balance, Principal Amount | $ 21,104,000 | ||||||
| Investment Owned, at Cost | $ 21,104,000 | 21,104,000 | |||||
| Investment Owned, at Fair Value | $ 21,602,000 | $ 22,741,000 | |||||
| Percent of net assets | 8.30% | 7.90% | 8.30% | 8.30% | 8.30% | 7.90% | |
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | |||||
| Investment, Type [Extensible Enumeration] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||
| Investment Owned, Balance, Principal Amount | $ 84,416,000 | $ 84,416,000 | |||||
| Investment Owned, at Cost | 84,416,000 | 84,416,000 | |||||
| Investment Owned, at Fair Value | $ 84,416,000 | $ 84,416,000 | $ 84,416,000 | ||||
| Percent of net assets | 32.50% | 29.50% | 32.50% | 32.50% | 32.50% | 29.50% | |
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Delayed Draw Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 9.92% | 10.58% | 9.92% | 9.92% | 9.92% | 10.58% | |
| Investment, Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, at Fair Value | $ 1,000 | $ 2,000 | |||||
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 9.92% | 10.58% | 9.92% | 9.92% | 9.92% | 10.58% | |
| Investment, Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 345,000 | $ 258,000 | |||||
| Investment Owned, at Cost | 340,000 | 253,000 | |||||
| Investment Owned, at Fair Value | $ 346,000 | $ 254,000 | |||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | |
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 9.92% | 10.58% | 9.92% | 9.92% | 9.92% | 10.58% | |
| Investment, Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | |||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 7,148,000 | $ 7,689,000 | |||||
| Investment Owned, at Cost | 7,045,000 | 7,548,000 | |||||
| Investment Owned, at Fair Value | $ 7,100,000 | $ 7,555,000 | |||||
| Percent of net assets | 2.70% | 2.60% | 2.70% | 2.70% | 2.70% | 2.60% | |
| Investment, Identifier [Axis]: What If Media Group, LLC Common Units | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WhatIfMediaGroupLLCMember | whfcl:WhatIfMediaGroupLLCMember | |||||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |
| Investment, Acquisition Date | Jul. 02, 2021 | Jul. 02, 2021 | |||||
| Investment Owned, Balance, Shares | shares | 3,081 | 3,081 | 3,081 | 3,081 | |||
| Investment Owned, Balance, Principal Amount | $ 3,081,000 | ||||||
| Investment Owned, at Cost | $ 851,000 | 851,000 | |||||
| Investment Owned, at Fair Value | $ 1,963,000 | $ 1,756,000 | |||||
| Percent of net assets | 0.80% | 0.60% | 0.80% | 0.80% | 0.80% | 0.60% | |
| Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WhitestoneHomeFurnishingsLlcMember | whfcl:WhitestoneHomeFurnishingsLlcMember | |||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 6.00% | 5.25% | 5.25% | 5.25% | 6.00% | |
| Investment Interest Rate | 8.97% | 10.46% | 8.97% | 8.97% | 8.97% | 10.46% | |
| Investment, Acquisition Date | Nov. 06, 2023 | Nov. 06, 2023 | |||||
| Investment Maturity Date | Aug. 20, 2026 | Aug. 20, 2026 | Aug. 20, 2026 | Aug. 20, 2026 | Aug. 20, 2026 | Aug. 20, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 2,848,000 | $ 2,930,000 | |||||
| Investment Owned, at Cost | 2,832,000 | 2,887,000 | |||||
| Investment Owned, at Fair Value | $ 2,848,000 | $ 2,930,000 | |||||
| Percent of net assets | 1.10% | 1.00% | 1.10% | 1.10% | 1.10% | 1.00% | |
| Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Revolving Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ZephyrBuyerL.p.Member | whfcl:ZephyrBuyerL.p.Member | |||||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | whfcl:SecuredOvernightFinancingRateMember | |
| Investment, Interest Rate, Floor | 0.50% | 1.00% | 0.50% | 0.50% | 0.50% | 1.00% | |
| Spread Above Index | 4.75% | 6.50% | 4.75% | 4.75% | 4.75% | 6.50% | |
| Investment Interest Rate | 8.42% | 10.83% | 8.42% | 8.42% | 8.42% | 10.83% | |
| Investment, Acquisition Date | Jan. 31, 2024 | Jan. 31, 2024 | |||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2030 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2030 | |
| Investment Owned, at Fair Value | $ 32,000 | $ 48,000 | |||||
| Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Term Loan | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ZephyrBuyerL.p.Member | ||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||
| Spread Above Index | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Investment Interest Rate | 8.42% | 8.42% | 8.42% | 8.42% | |||
| Investment, Acquisition Date | Jan. 31, 2024 | ||||||
| Investment Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |||
| Investment Owned, Balance, Principal Amount | $ 13,945,000 | ||||||
| Investment Owned, at Cost | 13,701,000 | ||||||
| Investment Owned, at Fair Value | $ 13,945,000 | ||||||
| Percent of net assets | 5.40% | 5.40% | 5.40% | 5.40% | |||
| Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 532,286,000 | 631,941,000 | |||||
| Investment Owned, at Fair Value | $ 520,114,000 | $ 596,626,000 | |||||
| Percent of net assets | 200.20% | 208.40% | 200.20% | 200.20% | 200.20% | 208.40% | |
| Money Market Funds | |||||||
| Schedule of Investments [Line Items] | |||||||
| Money Market Funds amortized cost | $ 21,048,000 | $ 13,249,000 | |||||
| Money Market Fair Value | $ 21,048,000 | $ 13,249,000 | |||||
| Percent of net assets | 8.10% | 4.60% | 8.10% | 8.10% | 8.10% | 4.60% | |
| Money Market Funds | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Money Market Funds amortized cost | $ 5,882,000 | $ 767,000 | |||||
| Money Market Fair Value | $ 5,882,000 | $ 767,000 | |||||
| Percent of net assets | 17.90% | 2.20% | 17.90% | 17.90% | 17.90% | 2.20% | |
| Goldman Sachs Money Market Fund (CUSIP: 38141W315) | |||||||
| Schedule of Investments [Line Items] | |||||||
| Weighted average interest rate | 3.34% | 4.33% | 3.34% | 3.34% | 3.34% | 4.33% | |
| Money Market Funds amortized cost | $ 8,829,000 | $ 837,000 | |||||
| Money Market Fair Value | $ 8,829,000 | $ 837,000 | |||||
| Percent of net assets | 3.40% | 0.30% | 3.40% | 3.40% | 3.40% | 0.30% | |
| Goldman Sachs Money Market Fund (CUSIP: 38141W315) | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Weighted average interest rate | 3.34% | 4.33% | 3.34% | 3.34% | 3.34% | 4.33% | |
| Money Market Funds amortized cost | $ 2,602,000 | $ 242,000 | |||||
| Money Market Fair Value | $ 2,602,000 | $ 242,000 | |||||
| Percent of net assets | 7.90% | 0.70% | 7.90% | 7.90% | 7.90% | 0.70% | |
| JPMORGAN U.S. Treas Plus Money Market Fund | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Weighted average interest rate | 3.65% | 4.39% | 3.65% | 3.65% | 3.65% | 4.39% | |
| Money Market Funds amortized cost | $ 3,279,000 | $ 525,000 | |||||
| Money Market Fair Value | $ 3,279,000 | $ 525,000 | |||||
| Percent of net assets | 10.00% | 1.50% | 10.00% | 10.00% | 10.00% | 1.50% | |
| Invesco Treasury Money Market Fund (CUSIP: 825252406) | |||||||
| Schedule of Investments [Line Items] | |||||||
| Weighted average interest rate | 3.09% | 3.83% | 3.09% | 3.09% | 3.09% | 3.83% | |
| Money Market Funds amortized cost | $ 7,032,000 | $ 12,412,000 | |||||
| Money Market Fair Value | $ 7,032,000 | $ 12,412,000 | |||||
| Percent of net assets | 2.70% | 4.30% | 2.70% | 2.70% | 2.70% | 4.30% | |
| Advertising | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 19,031,000 | $ 11,937,000 | |||||
| Investment Owned, at Fair Value | $ 19,052,000 | $ 12,035,000 | |||||
| Fair Value As A Percentage of Member's Equity | 58.00% | 34.80% | |||||
| Advertising | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 1,191,000 | $ 16,365,000 | |||||
| Investment Owned, at Fair Value | $ 1,196,000 | $ 16,862,000 | |||||
| Percent of net assets | 0.50% | 6.00% | 0.50% | 0.50% | 0.50% | 6.00% | |
| Air Freight & Logistics | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 3,262,000 | $ 3,286,000 | |||||
| Investment Owned, at Fair Value | $ 3,273,000 | $ 3,311,000 | |||||
| Fair Value As A Percentage of Member's Equity | 10.00% | 9.60% | |||||
| Air Freight & Logistics | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 30,732,000 | $ 29,360,000 | |||||
| Investment Owned, at Fair Value | $ 30,754,000 | $ 28,518,000 | |||||
| Percent of net assets | 11.70% | 9.90% | 11.70% | 11.70% | 11.70% | 9.90% | |
| Asset Management & Custody Banks | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 8,881,000 | ||||||
| Investment Owned, at Fair Value | $ 9,074,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 27.60% | ||||||
| Aerospace & Defense | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 3,633,000 | ||||||
| Investment Owned, at Fair Value | $ 3,682,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 10.60% | ||||||
| Application Software | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 22,062,000 | $ 36,508,000 | |||||
| Investment Owned, at Fair Value | $ 20,888,000 | $ 26,924,000 | |||||
| Percent of net assets | 8.00% | 9.40% | 8.00% | 8.00% | 8.00% | 9.40% | |
| Broadline Retail | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 18,019,000 | $ 18,577,000 | |||||
| Investment Owned, at Fair Value | $ 17,260,000 | $ 17,827,000 | |||||
| Fair Value As A Percentage of Member's Equity | 52.50% | 51.50% | |||||
| Broadline Retail | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 4,556,000 | ||||||
| Investment Owned, at Fair Value | $ 4,580,000 | ||||||
| Percent of net assets | 1.60% | 1.60% | |||||
| Building Products | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 22,594,000 | $ 13,445,000 | |||||
| Investment Owned, at Fair Value | $ 22,800,000 | $ 13,437,000 | |||||
| Fair Value As A Percentage of Member's Equity | 69.40% | 38.80% | |||||
| Building Products | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 14,957,000 | $ 15,006 | |||||
| Investment Owned, at Fair Value | $ 13,748,000 | $ 13,206 | |||||
| Percent of net assets | 5.30% | 4.60% | 5.30% | 5.30% | 5.30% | 4.60% | |
| Commodity Chemicals | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 6,918,000 | ||||||
| Investment Owned, at Fair Value | $ 6,948,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 21.10% | ||||||
| Commodity Chemicals | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 15,765,000 | ||||||
| Investment Owned, at Fair Value | $ 16,026,000 | ||||||
| Percent of net assets | 5.60% | 5.60% | |||||
| Construction & Engineering | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 18,386,000 | $ 16,016,000 | |||||
| Investment Owned, at Fair Value | $ 18,284,000 | $ 16,253,000 | |||||
| Fair Value As A Percentage of Member's Equity | 55.70% | 47.00% | |||||
| Construction & Engineering | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 9,736,000 | $ 3,539,000 | |||||
| Investment Owned, at Fair Value | $ 9,849,000 | $ 3,539,000 | |||||
| Percent of net assets | 3.80% | 1.20% | 3.80% | 3.80% | 3.80% | 1.20% | |
| Data Processing & Outsourced Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 14,234,000 | ||||||
| Investment Owned, at Fair Value | $ 12,885,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 37.20% | ||||||
| Data Processing & Outsourced Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 26,661,000 | $ 28,409,000 | |||||
| Investment Owned, at Fair Value | $ 26,789,000 | $ 28,572,000 | |||||
| Percent of net assets | 10.30% | 10.00% | 10.30% | 10.30% | 10.30% | 10.00% | |
| Diversified Support Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 24,227,000 | $ 19,107,000 | |||||
| Investment Owned, at Fair Value | $ 23,644,000 | $ 19,282,000 | |||||
| Fair Value As A Percentage of Member's Equity | 71.80% | 55.70% | |||||
| Diversified Support Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 9,440,000 | $ 9,559,000 | |||||
| Investment Owned, at Fair Value | $ 9,337,000 | $ 9,414,000 | |||||
| Percent of net assets | 3.60% | 3.30% | 3.60% | 3.60% | 3.60% | 3.30% | |
| Electrical Components & Equipment | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 9,298,000 | $ 3,479,000 | |||||
| Investment Owned, at Fair Value | $ 9,332,000 | $ 3,479,000 | |||||
| Fair Value As A Percentage of Member's Equity | 28.40% | 10.10% | |||||
| Environmental & Facilities Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 29,460,000 | $ 29,529,000 | |||||
| Investment Owned, at Fair Value | $ 29,529,000 | $ 29,963,000 | |||||
| Fair Value As A Percentage of Member's Equity | 90.00% | 86.60% | |||||
| Environmental & Facilities Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 1,568,000 | ||||||
| Investment Owned, at Fair Value | $ 1,610,000 | ||||||
| Percent of net assets | 0.70% | 0.70% | 0.70% | 0.70% | |||
| Health Care Facilities | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 13,327,000 | $ 7,944,000 | |||||
| Investment Owned, at Fair Value | $ 13,387,000 | $ 8,004,000 | |||||
| Fair Value As A Percentage of Member's Equity | 40.70% | 23.10% | |||||
| Health Care Facilities | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 4,534,000 | $ 8,694,000 | |||||
| Investment Owned, at Fair Value | $ 4,623,000 | $ 8,660,000 | |||||
| Percent of net assets | 1.80% | 3.00% | 1.80% | 1.80% | 1.80% | 3.00% | |
| Health Care Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 4,872,000 | $ 4,898,000 | |||||
| Investment Owned, at Fair Value | $ 4,982,000 | $ 4,995,000 | |||||
| Fair Value As A Percentage of Member's Equity | 15.10% | 14.40% | |||||
| Health Care Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 8,315,000 | $ 19,577,000 | |||||
| Investment Owned, at Fair Value | $ 8,389,000 | $ 19,589,000 | |||||
| Percent of net assets | 3.20% | 6.90% | 3.20% | 3.20% | 3.20% | 6.90% | |
| Health Care Supplies | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 7,461,000 | ||||||
| Investment Owned, at Fair Value | $ 7,696,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 22.20% | ||||||
| Health Care Supplies | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 20,227,000 | $ 20,142,000 | |||||
| Investment Owned, at Fair Value | $ 20,026,000 | $ 19,535,000 | |||||
| Percent of net assets | 7.70% | 6.80% | 7.70% | 7.70% | 7.70% | 6.80% | |
| Health Care Technology | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 4,132,000 | ||||||
| Investment Owned, at Fair Value | $ 4,183,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 12.70% | ||||||
| Human Resource & Employment Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 2,484,000 | ||||||
| Investment Owned, at Fair Value | $ 2,493,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 7.60% | ||||||
| Human Resource & Employment Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 2,899,000 | ||||||
| Investment Owned, at Fair Value | $ 2,909,000 | ||||||
| Percent of net assets | 1.10% | 1.10% | 1.10% | 1.10% | |||
| Household Appliances | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 7,416,000 | $ 7,649,000 | |||||
| Investment Owned, at Fair Value | $ 8,225,000 | $ 7,632,000 | |||||
| Fair Value As A Percentage of Member's Equity | 25.00% | 22.00% | |||||
| Household Appliances | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 1,363,000 | $ 22,326,000 | |||||
| Investment Owned, at Fair Value | $ 1,199,000 | $ 21,255,000 | |||||
| Percent of net assets | 0.50% | 7.40% | 0.50% | 0.50% | 0.50% | 7.40% | |
| Household Products | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 10,293,000 | ||||||
| Investment Owned, at Fair Value | $ 10,384,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 31.60% | ||||||
| Household Products | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 11,400,000 | $ 12,104,000 | |||||
| Investment Owned, at Fair Value | $ 9,658,000 | $ 11,656,000 | |||||
| Percent of net assets | 3.70% | 4.10% | 3.70% | 3.70% | 3.70% | 4.10% | |
| Industrial Machinery & Supplies & Components | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 12,154,000 | $ 12,124,000 | |||||
| Investment Owned, at Fair Value | $ 12,334,000 | $ 12,225,000 | |||||
| Percent of net assets | 4.70% | 4.30% | 4.70% | 4.70% | 4.70% | 4.30% | |
| IT Consulting And Other Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 35,186,000 | $ 32,427,000 | |||||
| Investment Owned, at Fair Value | $ 34,895,000 | $ 32,720,000 | |||||
| Fair Value As A Percentage of Member's Equity | 106.20% | 94.60% | |||||
| IT Consulting And Other Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 281,000 | ||||||
| Investment Owned, at Fair Value | $ 300,000 | ||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||
| Leisure Products | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 25,612,000 | $ 45,674,000 | |||||
| Investment Owned, at Fair Value | $ 23,767,000 | $ 23,298,000 | |||||
| Percent of net assets | 9.20% | 8.10% | 9.20% | 9.20% | 9.20% | 8.10% | |
| Packaged Foods & Meats | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 6,867,000 | $ 6,939,000 | |||||
| Investment Owned, at Fair Value | $ 6,961,000 | $ 7,009,000 | |||||
| Fair Value As A Percentage of Member's Equity | 21.00% | 20.20% | |||||
| Packaged Foods & Meats | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 3,973,000 | $ 4,024,000 | |||||
| Investment Owned, at Fair Value | $ 4,033,000 | $ 4,087,000 | |||||
| Percent of net assets | 1.60% | 1.40% | 1.60% | 1.60% | 1.60% | 1.40% | |
| Paper & Plastic Packaging Products & Materials | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 14,694,000 | $ 14,964,000 | |||||
| Investment Owned, at Fair Value | $ 14,729,000 | $ 14,881,000 | |||||
| Fair Value As A Percentage of Member's Equity | 44.70% | 43.20% | |||||
| Personal Products | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 3,850,000 | ||||||
| Investment Owned, at Fair Value | $ 3,887,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 11.70% | ||||||
| Pharmaceuticals | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 16,411,000 | ||||||
| Investment Owned, at Fair Value | $ 15,461,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 44.70% | ||||||
| Pharmaceuticals | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 12,031,000 | ||||||
| Investment Owned, at Fair Value | $ 12,027,000 | ||||||
| Percent of net assets | 4.70% | 4.70% | 4.70% | 4.70% | |||
| Real Estate Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 12,651,000 | $ 14,554,000 | |||||
| Investment Owned, at Fair Value | $ 12,139,000 | $ 13,782,000 | |||||
| Fair Value As A Percentage of Member's Equity | 36.90% | 39.80% | |||||
| Research & Consulting Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 3,890,000 | $ 11,900,000 | |||||
| Investment Owned, at Fair Value | $ 3,859,000 | $ 11,977,000 | |||||
| Fair Value As A Percentage of Member's Equity | 11.70% | 34.60% | |||||
| Research & Consulting Services | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment Owned, at Cost | $ 4,748,000 | $ 4,823,000 | |||||
| Investment Owned, at Fair Value | $ 4,831,000 | $ 4,927,000 | |||||
| Percent of net assets | 1.90% | 1.70% | 1.90% | 1.90% | 1.90% | 1.70% | |
| Systems Software | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 18,657,000 | $ 16,573,000 | |||||
| Investment Owned, at Fair Value | $ 19,360,000 | $ 17,267,000 | |||||
| Percent of net assets | 7.50% | 5.90% | 7.50% | 7.50% | 7.50% | 5.90% | |
| Technology Hardware, Storage & Peripherals | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 17,746,000 | $ 17,880,000 | |||||
| Investment Owned, at Fair Value | $ 17,840,000 | $ 17,949,000 | |||||
| Fair Value As A Percentage of Member's Equity | 54.30% | 51.80% | |||||
| Technology Hardware, Storage & Peripherals | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | First Lien Secured Term Loan [Member] | |||||
| Investment Owned, at Cost | $ 11,437,000 | $ 18,547,000 | |||||
| Investment Owned, at Fair Value | $ 11,457,000 | $ 18,072,000 | |||||
| Percent of net assets | 4.40% | 6.30% | 4.40% | 4.40% | 4.40% | 6.30% | |
| Water Utilities | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 5,099,000 | ||||||
| Investment Owned, at Fair Value | $ 5,172,000 | ||||||
| Fair Value As A Percentage of Member's Equity | 15.70% | ||||||
| Distributors | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 9,911,000 | $ 9,307,000 | |||||
| Investment Owned, at Fair Value | $ 9,992,000 | $ 9,372,000 | |||||
| Fair Value As A Percentage of Member's Equity | 30.30% | 27.10% | |||||
| Distributors | Debt Investments | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 10,243,000 | $ 10,563,000 | |||||
| Investment Owned, at Fair Value | $ 10,404,000 | $ 10,690,000 | |||||
| Percent of net assets | 3.90% | 3.70% | 3.90% | 3.90% | 3.90% | 3.70% | |
| Food Distributors | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 4,889,000 | $ 4,919,000 | |||||
| Investment Owned, at Fair Value | $ 4,928,000 | $ 4,993,000 | |||||
| Fair Value As A Percentage of Member's Equity | 15.00% | 14.40% | |||||
| Wireless Telecommunication Services | STRS JV | |||||||
| Schedule of Investments [Line Items] | |||||||
| Investment Owned, at Cost | $ 6,218,000 | $ 6,256,000 | |||||
| Investment Owned, at Fair Value | $ 6,300,000 | $ 6,332,000 | |||||
| Fair Value As A Percentage of Member's Equity | 19.10% | 18.30% | |||||