Consolidated Schedule of Investments € in Thousands, $ in Thousands |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2026
USD ($)
|
Dec. 31, 2025
USD ($)
|
Jun. 30, 2026
EUR (€)
|
Dec. 31, 2024
USD ($)
|
|
| Schedule of Investments [Line Items] | ||||
| PIK interest rate | 12.39% | 12.39% | ||
| Investments, amortized cost | $ 594,296 | $ 607,574 | ||
| Investments, fair value | $ 569,202 | $ 578,649 | ||
| Percent of net assets | 225.10% | 222.70% | 225.10% | |
| Total investments and money market funds amortized cost | $ 617,260 | $ 628,622 | ||
| Total investments and money market funds fair value | $ 592,166 | $ 599,697 | ||
| Total investments and money market funds percentage | 234.20% | 230.80% | 234.20% | |
| Qualifying assets required of acquiree at time of acquisition of total assets | 70.00% | 70.00% | ||
| Qualifying assets of acquired of total assets | 80.40% | 79.40% | ||
| Investments of net assets | 225.10% | 222.70% | ||
| Investment Of total assets | 94.20% | 94.10% | ||
| Unrealized appreciation | $ 67 | $ 2 | ||
| Unrealized depreciation | $ (325) | |||
| 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 | whfcl:AbCentersAcquisitionCorporationMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.89% | 8.97% | 8.89% | |
| Acquisition Date | Sep. 19, 2024 | Sep. 19, 2024 | ||
| Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |
| Principal/Share Amount | $ 559 | $ 408 | ||
| Investments, amortized cost | 554 | 405 | ||
| Investments, fair value | $ 564 | $ 409 | ||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | whfcl:AbCentersAcquisitionCorporationMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.89% | 8.97% | 8.89% | |
| Acquisition Date | Sep. 19, 2024 | Sep. 19, 2024 | ||
| Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |
| Investments, fair value | $ 8 | $ 5 | ||
| Investment, Identifier [Axis]: AB Centers Acquisition Corporation First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AbCentersAcquisitionCorporationMember | whfcl:AbCentersAcquisitionCorporationMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.89% | 8.97% | 8.89% | |
| Acquisition Date | Sep. 19, 2024 | Sep. 19, 2024 | ||
| Maturity Date | Jul. 02, 2031 | Jul. 02, 2031 | Jul. 02, 2031 | |
| Principal/Share Amount | $ 12,976 | $ 13,039 | ||
| Investments, amortized cost | 12,870 | 12,922 | ||
| Investments, fair value | $ 12,976 | $ 12,973 | ||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.39% | 11.34% | 11.39% | |
| Acquisition Date | Feb. 23, 2022 | Feb. 23, 2022 | ||
| Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |
| Principal/Share Amount | $ 20,409 | $ 20,409 | ||
| Investments, amortized cost | 20,269 | 20,227 | ||
| Investments, fair value | $ 20,409 | $ 20,026 | ||
| Percent of net assets | 8.10% | 7.70% | 8.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 5.50% | |||
| Interest Rate | 9.39% | |||
| Acquisition Date | Apr. 26, 2024 | |||
| Maturity Date | Apr. 16, 2030 | |||
| Investments, fair value | $ 15 | |||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | whfcl:ApgLionsPurchaserLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.18% | 9.39% | 9.18% | |
| Acquisition Date | Apr. 26, 2024 | Apr. 26, 2024 | ||
| Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | |
| Investments, fair value | $ 5 | $ 6 | ||
| Investment, Identifier [Axis]: APG Lions Purchaser, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ApgLionsPurchaserLlcMember | whfcl:ApgLionsPurchaserLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.18% | 9.39% | 9.18% | |
| Acquisition Date | Apr. 26, 2024 | Apr. 26, 2024 | ||
| Maturity Date | Apr. 16, 2030 | Apr. 16, 2030 | Apr. 16, 2030 | |
| Principal/Share Amount | $ 4,008 | $ 4,046 | ||
| Investments, amortized cost | 3,970 | 4,002 | ||
| Investments, fair value | $ 4,008 | $ 4,046 | ||
| Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsHoldingsLlcMember | |||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | |||
| 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 | |||
| Investment, Type [Extensible Enumeration] | whfcl:SuperPriorityFirstLienSecuredTermLoanMember | |||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Identifier [Axis]: American Crafts, LC Priority First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AmericanCraftsLCMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:PriorityFirstLienSecuredLoanMember | |||
| 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 | |||
| Investment, Type [Extensible Enumeration] | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember | |||
| Investments, fair value | $ 373 | |||
| 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 | |||
| Investment, Type [Extensible Enumeration] | whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanOneMember | |||
| 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 | whfcl:ApollonHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.17% | 9.33% | 9.17% | |
| Acquisition Date | Jul. 21, 2025 | Jul. 21, 2025 | ||
| Maturity Date | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | |
| Principal/Share Amount | $ 4,849 | $ 2,372 | ||
| Investments, amortized cost | 4,787 | 2,339 | ||
| Investments, fair value | $ 4,936 | $ 2,442 | ||
| 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 | whfcl:ApollonHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.17% | 9.37% | 9.17% | |
| Acquisition Date | Jul. 21, 2025 | Jul. 21, 2025 | ||
| Maturity Date | Jun. 18, 2032 | Jun. 18, 2032 | Jun. 18, 2032 | |
| Principal/Share Amount | $ 6,600 | $ 6,633 | ||
| Investments, amortized cost | 6,516 | 6,542 | ||
| Investments, fair value | $ 6,645 | $ 6,632 | ||
| Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC), Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanGpLlcMember | whfcl:ArcserveCaymanGpLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | ||
| Principal/Share Amount | $ 663 | $ 663 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| PIK interest rate | 11.73% | 11.99% | 11.73% | |
| Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | ||
| Maturity Date | Jan. 04, 2027 | Jan. 04, 2027 | Jan. 04, 2027 | |
| Principal/Share Amount | $ 829 | $ 781 | ||
| Investments, amortized cost | 825 | 775 | ||
| Investments, fair value | $ 1,226 | $ 1,240 | 1,247 | |
| Percent of net assets | 0.50% | 0.50% | 0.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan One | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| Floor | 0.00% | 0.00% | ||
| Spread Above Index | 9.00% | 9.00% | 9.00% | |
| PIK interest rate | 9.00% | |||
| PIK interest rate | 9.00% | 9.00% | ||
| Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | ||
| Maturity Date | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | |
| Principal/Share Amount | $ 665 | $ 636 | ||
| Investments, amortized cost | 658 | 627 | ||
| Investments, fair value | $ 665 | $ 636 | 581 | |
| Percent of net assets | 0.30% | 0.20% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan Two | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanOpcoLpMember | whfcl:ArcserveCaymanOpcoLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | whfcl:UnsecuredLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| Floor | 0.00% | 0.00% | ||
| Spread Above Index | 9.00% | 9.00% | 9.00% | |
| PIK interest rate | 9.00% | |||
| PIK interest rate | 9.00% | 9.00% | ||
| Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | ||
| Maturity Date | Jul. 02, 2029 | Jul. 02, 2029 | Jul. 02, 2029 | |
| Principal/Share Amount | $ 680 | $ 650 | ||
| Investments, amortized cost | 673 | 642 | ||
| Investments, fair value | $ 680 | $ 650 | 594 | |
| Percent of net assets | 0.30% | 0.30% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC), Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ArcserveCaymanTopcoLpMember | whfcl:ArcserveCaymanTopcoLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| Acquisition Date | Jan. 03, 2024 | Jan. 03, 2024 | ||
| Principal/Share Amount | $ 663 | $ 663 | ||
| Investments, amortized cost | 19,568 | 19,568 | ||
| Investments, fair value | $ 9,149 | $ 9,144 | 9,131 | |
| Percent of net assets | 3.60% | 3.50% | 3.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Atlas Parent, LLC, Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AtlasParentLlcMember | whfcl:AtlasParentLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | |
| Acquisition Date | Oct. 24, 2025 | Oct. 24, 2025 | ||
| Principal/Share Amount | $ 19 | $ 19 | ||
| Investments, amortized cost | 1,682 | 1,682 | ||
| Investments, fair value | $ 1,690 | $ 1,853 | ||
| Percent of net assets | 0.70% | 0.70% | 0.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AvisionHoldingsLLCMember | whfcl:AvisionHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.88% | 9.82% | 9.88% | |
| Acquisition Date | May 31, 2024 | May 31, 2024 | ||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Principal/Share Amount | $ 545 | $ 548 | ||
| Investments, amortized cost | 543 | 544 | ||
| Investments, fair value | $ 544 | $ 546 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AvisionHoldingsLLCMember | whfcl:AvisionHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.88% | 9.82% | 9.88% | |
| Acquisition Date | May 31, 2024 | May 31, 2024 | ||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Principal/Share Amount | $ 648 | $ 652 | ||
| Investments, amortized cost | 646 | 647 | ||
| Investments, fair value | $ 647 | $ 650 | ||
| Percent of net assets | 0.30% | 0.30% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group), Class A LLC Interests | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:AvisionHoldingsLLCMember | whfcl:AvisionHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | whfcl:ClassALLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Acquisition Date | Dec. 15, 2021 | Dec. 15, 2021 | ||
| Principal/Share Amount | $ 319 | $ 299 | ||
| Investments, amortized cost | 319 | 299 | ||
| Investments, fair value | $ 297 | $ 322 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC Shares | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BBQBuyerLLCMember | whfcl:BBQBuyerLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SharesMember | Common Stock [Member] | whfcl:SharesMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | |
| Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | ||
| Principal/Share Amount | $ 1,100 | $ 1,100 | ||
| Investments, amortized cost | 1,100 | 1,100 | ||
| Investments, fair value | $ 911 | $ 1,003 | ||
| Percent of net assets | 0.40% | 0.40% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: BL Products Parent, LP (d/b/a Bishop Lifting Products, Inc.) Class A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BLProductsParentLPMember | whfcl:BLProductsParentLPMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | |
| Acquisition Date | Feb. 01, 2022 | Feb. 01, 2022 | ||
| Principal/Share Amount | $ 733 | $ 733 | ||
| Investments, amortized cost | 788 | 788 | ||
| Investments, fair value | $ 344 | $ 561 | ||
| Percent of net assets | 0.10% | 0.20% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BPII-JLGroupHoldingsLPMember | whfcl:BPII-JLGroupHoldingsLPMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Acquisition Date | Dec. 29, 2021 | Dec. 29, 2021 | ||
| Principal/Share Amount | $ 90 | $ 90 | ||
| Investments, amortized cost | 942 | 942 | ||
| Investments, fair value | $ 1,577 | $ 1,645 | ||
| Percent of net assets | 0.60% | 0.60% | 0.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing Services | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.37% | 10.34% | 10.37% | |
| Acquisition Date | Apr. 04, 2024 | Apr. 04, 2024 | ||
| Maturity Date | Apr. 10, 2029 | Mar. 30, 2029 | Apr. 10, 2029 | |
| Principal/Share Amount | $ 276 | $ 276 | ||
| Investments, amortized cost | 271 | 270 | ||
| Investments, fair value | $ 283 | $ 283 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing Services | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.19% | 10.29% | 10.19% | |
| Acquisition Date | Apr. 04, 2024 | Apr. 04, 2024 | ||
| Maturity Date | Apr. 10, 2029 | Mar. 30, 2029 | Apr. 10, 2029 | |
| Principal/Share Amount | $ 7,116 | $ 7,374 | ||
| Investments, amortized cost | 6,998 | 7,231 | ||
| Investments, fair value | $ 7,092 | $ 7,331 | ||
| Percent of net assets | 2.80% | 2.80% | 2.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.91% | 10.07% | 9.91% | |
| Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Principal/Share Amount | $ 1,848 | $ 1,873 | ||
| Investments, amortized cost | 1,825 | 1,845 | ||
| Investments, fair value | $ 1,848 | $ 1,766 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.91% | 10.07% | 9.91% | |
| Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Principal/Share Amount | $ 168 | $ 168 | ||
| Investments, amortized cost | 166 | 166 | ||
| Investments, fair value | $ 180 | $ 118 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.91% | 10.07% | 9.91% | |
| Acquisition Date | Dec. 21, 2023 | Dec. 21, 2023 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Principal/Share Amount | $ 2,917 | $ 2,956 | ||
| Investments, amortized cost | 2,881 | 2,912 | ||
| Investments, fair value | $ 2,917 | $ 2,787 | ||
| Investment, Identifier [Axis]: Barrett Purchaser LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | whfcl:BarrettPurchaserLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 6.00% | 5.92% | 6.00% | |
| Interest Rate | 9.68% | 10.02% | 9.68% | |
| Acquisition Date | Jan. 10, 2024 | Jan. 10, 2024 | ||
| Maturity Date | Nov. 21, 2028 | Nov. 21, 2028 | Nov. 21, 2028 | |
| Principal/Share Amount | $ 447 | $ 373 | ||
| Investments, amortized cost | 442 | 367 | ||
| Investments, fair value | $ 439 | $ 366 | ||
| Investment, Identifier [Axis]: Barrett Purchaser LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BarrettPurchaserLlcMember | whfcl:BarrettPurchaserLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.67% | 9.82% | 9.67% | |
| Acquisition Date | Jan. 10, 2024 | Jan. 10, 2024 | ||
| Maturity Date | Nov. 21, 2029 | Nov. 21, 2029 | Nov. 21, 2029 | |
| Principal/Share Amount | $ 3,562 | $ 3,580 | ||
| Investments, amortized cost | 3,512 | 3,523 | ||
| Investments, fair value | $ 3,480 | $ 3,493 | ||
| 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 Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:BuckeyeAcquirorLlcMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.50% | |||
| Interest Rate | 10.32% | |||
| Acquisition Date | Dec. 17, 2025 | |||
| Maturity Date | Aug. 01, 2029 | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.42% | 6.44% | 6.42% | |
| Interest Rate | 8.28% | 10.26% | 8.28% | |
| Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Principal/Share Amount | $ 2,405 | $ 2,319 | ||
| Investments, amortized cost | 2,371 | 2,281 | ||
| Investments, fair value | $ 2,406 | $ 2,323 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Principal/Share Amount | $ 643 | $ 370 | ||
| Investments, amortized cost | 635 | 365 | ||
| Investments, fair value | $ 648 | $ 379 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.42% | 6.42% | 6.42% | |
| Interest Rate | 10.16% | 10.23% | 10.16% | |
| Acquisition Date | Aug. 09, 2023 | Aug. 09, 2023 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Principal/Share Amount | $ 6,799 | $ 6,834 | ||
| Investments, amortized cost | 6,713 | 6,733 | ||
| Investments, fair value | $ 6,795 | $ 6,834 | ||
| Investment, Identifier [Axis]: CX Holdco LLC Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CXHoldcoLLCMember | whfcl:CXHoldcoLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Acquisition Date | May 04, 2021 | May 04, 2021 | ||
| Principal/Share Amount | $ 1,068 | $ 1,068 | ||
| Investments, amortized cost | $ 1,116 | 1,116 | ||
| Investments, fair value | $ 218 | |||
| Percent of net assets | 0.10% | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Camarillo Fitness Holdings, LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Camarillo Fitness Holdings, LLC [Member] | Camarillo Fitness Holdings, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.50% | 8.50% | 8.50% | |
| PIK interest rate | 12.83% | |||
| Acquisition Date | Jan. 10, 2025 | Jan. 10, 2025 | ||
| Maturity Date | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | |
| Principal/Share Amount | $ 1,380 | $ 1,218 | ||
| Investments, amortized cost | 1,216 | 1,135 | ||
| Investments, fair value | $ 249 | $ 196 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Camarillo Fitness Holdings, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.50% | 8.50% | 8.50% | |
| PIK interest rate | 12.38% | 12.32% | 12.38% | |
| Acquisition Date | Sep. 25, 2024 | Sep. 25, 2024 | ||
| Maturity Date | Sep. 25, 2029 | Sep. 25, 2029 | Sep. 25, 2029 | |
| Principal/Share Amount | $ 14,213 | $ 13,370 | ||
| Investments, amortized cost | 10,231 | 10,231 | ||
| Investments, fair value | $ 2,563 | $ 5,354 | 10,492 | |
| Percent of net assets | 1.00% | 2.10% | 1.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CampFacilityServicesHoldingsLLCMember | whfcl:CampFacilityServicesHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | Real Estate Services [Member] | Real Estate 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | ||
| Maturity Date | Nov. 16, 2028 | Nov. 16, 2027 | Nov. 16, 2028 | |
| Principal/Share Amount | $ 10,197 | $ 10,294 | ||
| Investments, amortized cost | 10,147 | 10,230 | ||
| Investments, fair value | $ 9,380 | $ 9,781 | ||
| Percent of net assets | 3.70% | 3.80% | 3.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CampFacilityServicesParentLLCMember | whfcl:CampFacilityServicesParentLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | Real Estate Services [Member] | Real Estate Services [Member] | |
| Spread Above Index | 10.00% | 10.00% | 10.00% | |
| PIK interest rate | 10.00% | 10.00% | 10.00% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | ||
| Principal/Share Amount | $ 15 | $ 15 | ||
| Investments, amortized cost | $ 840 | 840 | ||
| Investments, fair value | $ 31 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | true | false | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA [Member] | Sterling Overnight Index Average [Member] | Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.60% | 10.59% | 10.60% | |
| Cash interest rate | 10.35% | 10.34% | 10.35% | |
| PIK interest rate | 0.25% | 0.25% | 0.25% | |
| Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | ||
| Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Principal/Share Amount | $ 167 | $ 158 | ||
| Investments, amortized cost | 217 | 206 | ||
| Investments, fair value | $ 206 | $ 205 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA [Member] | Sterling Overnight Index Average [Member] | Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.65% | 6.75% | |
| Interest Rate | 10.60% | 10.59% | 10.60% | |
| Cash interest rate | 10.35% | 10.34% | 10.35% | |
| PIK interest rate | 0.25% | 0.25% | 0.25% | |
| Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | ||
| Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Principal/Share Amount | $ 546 | $ 553 | ||
| Investments, amortized cost | 712 | 721 | ||
| Investments, fair value | $ 673 | $ 717 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.56% | 10.60% | 10.56% | |
| Cash interest rate | 10.31% | 10.35% | 10.31% | |
| PIK interest rate | 0.25% | 0.25% | 0.25% | |
| Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | ||
| Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Principal/Share Amount | $ 142 | $ 134 | ||
| Investments, amortized cost | 142 | 133 | ||
| Investments, fair value | $ 132 | $ 129 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate Six Month Term [Member] | Euro Interbank Offered Rate Six Month Term [Member] | Euro Interbank Offered Rate Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 7.00% | 7.00% | |
| Interest Rate | 9.14% | 9.07% | 9.14% | |
| Cash interest rate | 8.89% | 8.82% | 8.89% | |
| PIK interest rate | 0.25% | 0.25% | 0.25% | |
| Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | ||
| Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Principal/Share Amount | $ 616 | € 617 | ||
| Investments, amortized cost | $ 678 | 676 | ||
| Investments, fair value | $ 663 | $ 694 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.48% | 10.89% | 10.48% | |
| Cash interest rate | 10.23% | 10.64% | 10.23% | |
| PIK interest rate | 0.25% | 0.25% | 0.25% | |
| Acquisition Date | Sep. 11, 2024 | Sep. 11, 2024 | ||
| Maturity Date | May 04, 2029 | May 04, 2029 | May 04, 2029 | |
| Principal/Share Amount | $ 3,506 | $ 3,508 | ||
| Investments, amortized cost | 3,485 | 3,485 | ||
| Investments, fair value | $ 3,259 | $ 3,369 | ||
| Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) Second Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | us-gaap:InvestmentAffiliatedIssuerMember | Non-controlled/non-affiliate company investments | us-gaap:InvestmentAffiliatedIssuerMember | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ChaseProductsCoMember | whfcl:ChaseProductsCoMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.23% | 9.17% | 9.23% | |
| Cash interest rate | 8.99% | |||
| PIK interest rate | 0.18% | |||
| Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | ||
| Maturity Date | Mar. 16, 2028 | Mar. 16, 2028 | Mar. 16, 2028 | |
| Principal/Share Amount | $ 3,404 | $ 3,404 | ||
| Investments, amortized cost | 3,404 | 3,404 | ||
| Investments, fair value | $ 3,404 | $ 3,404 | 3,342 | |
| Percent of net assets | 1.30% | 1.30% | 1.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClaridgeProductsandEquipmentLLCMember | whfcl:ClaridgeProductsandEquipmentLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.56% | 8.38% | 7.56% | |
| Interest Rate | 12.64% | 13.54% | 12.64% | |
| Cash interest rate | 8.44% | 9.11% | 8.44% | |
| PIK interest rate | 4.20% | 4.19% | 4.20% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | ||
| Maturity Date | Mar. 31, 2027 | Mar. 31, 2027 | Mar. 31, 2027 | |
| Principal/Share Amount | $ 632 | $ 561 | ||
| Investments, amortized cost | 632 | 561 | ||
| Investments, fair value | $ 618 | $ 498 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClaridgeProductsandEquipmentLLCMember | whfcl:ClaridgeProductsandEquipmentLLCMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.75% | 8.00% | |
| Interest Rate | 11.74% | 12.57% | 11.74% | |
| Cash interest rate | 7.74% | 8.19% | 7.74% | |
| PIK interest rate | 4.00% | 4.38% | 4.00% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | ||
| Maturity Date | Mar. 31, 2027 | Mar. 31, 2027 | Mar. 31, 2027 | |
| Principal/Share Amount | $ 5,246 | $ 5,124 | ||
| Investments, amortized cost | 5,245 | 5,123 | ||
| Investments, fair value | $ 5,142 | $ 4,661 | ||
| Percent of net assets | 2.10% | 1.80% | 2.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Clark Restaurant Service, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ClarkRestaurantServiceLlcMember | whfcl:ClarkRestaurantServiceLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.38% | 9.47% | 9.38% | |
| Acquisition Date | Feb. 13, 2026 | Jun. 14, 2024 | ||
| Maturity Date | May 10, 2029 | May 10, 2029 | May 10, 2029 | |
| Principal/Share Amount | $ 219 | $ 4,956 | ||
| Investments, amortized cost | 215 | 4,889 | ||
| Investments, fair value | $ 218 | $ 4,928 | ||
| Percent of net assets | 0.10% | 0.10% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Clark Restaurant Service, LLC First Lien Secured Term Loan, One | ||||
| 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.75% | 5.75% | ||
| Interest Rate | 9.39% | 9.39% | ||
| Acquisition Date | Jun. 14, 2024 | |||
| Maturity Date | May 10, 2029 | May 10, 2029 | ||
| Principal/Share Amount | $ 4,896 | |||
| Investments, amortized cost | 4,839 | |||
| Investments, fair value | $ 4,877 | |||
| Investment, Identifier [Axis]: Colonnade Parent, Inc. (d/b/a Naviga Inc.) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ColonnadeParentIncMember | whfcl:ColonnadeParentIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Application Software | Air Freight & Logistics | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 1.00% | 1.00% | 1.00% | |
| Interest Rate | 4.83% | 4.77% | 4.83% | |
| Acquisition Date | Jun. 14, 2019 | Jun. 14, 2019 | ||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 301 | $ 301 | ||
| Investments, amortized cost | 279 | 287 | ||
| Investments, fair value | $ 159 | $ 158 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Colonnade Parent, Inc. (d/b/a Naviga Inc.) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ColonnadeParentIncMember | whfcl:ColonnadeParentIncMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Application Software | Air Freight & Logistics | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 1.00% | 1.00% | 1.00% | |
| Interest Rate | 4.83% | 4.77% | 4.83% | |
| Acquisition Date | Jun. 14, 2019 | Jun. 14, 2019 | ||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 3,644 | $ 3,667 | ||
| Investments, amortized cost | 2,883 | 2,988 | ||
| Investments, fair value | $ 1,920 | $ 1,925 | ||
| Percent of net assets | 0.80% | 0.70% | 0.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Cultural Experiences Abroad, LLC (d/b/a Cultural Experiences Abroad, Inc.) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CulturalExperiencesAbroadLlcMember | |||
| 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 | Education 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.86% | 5.86% | ||
| Interest Rate | 10.00% | 10.00% | ||
| Acquisition Date | Jan. 21, 2026 | |||
| Maturity Date | Jan. 21, 2032 | Jan. 21, 2032 | ||
| Principal/Share Amount | $ 1,044 | |||
| Investments, amortized cost | 1,030 | |||
| Investments, fair value | $ 1,032 | |||
| Percent of net assets | 0.40% | 0.40% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Cultural Experiences Abroad, LLC (d/b/a Cultural Experiences Abroad, Inc.) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CulturalExperiencesAbroadLlcMember | |||
| 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 | Education 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 6.00% | 6.00% | ||
| Interest Rate | 9.73% | 9.73% | ||
| Acquisition Date | Jan. 21, 2026 | |||
| Maturity Date | Jan. 21, 2032 | Jan. 21, 2032 | ||
| Principal/Share Amount | $ 9,485 | |||
| Investments, amortized cost | 9,353 | |||
| Investments, fair value | $ 9,365 | |||
| Percent of net assets | 3.70% | 3.70% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:DrewFoamCompaniesIncMember | whfcl:DrewFoamCompaniesIncMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.74% | 9.82% | 9.74% | |
| Acquisition Date | Nov. 09, 2020 | Nov. 09, 2020 | ||
| Maturity Date | Dec. 05, 2028 | Dec. 07, 2026 | Dec. 05, 2028 | |
| Principal/Share Amount | $ 13,287 | $ 13,358 | ||
| Investments, amortized cost | 13,270 | 13,331 | ||
| Investments, fair value | $ 13,245 | $ 13,314 | ||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | whfcl:ElmDebtcoLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Multi-Utilities [Member] | Multi-Utilities [Member] | Multi-Utilities [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.75% | 4.50% | |
| Interest Rate | 8.23% | 8.42% | 8.23% | |
| Acquisition Date | Nov. 20, 2025 | Nov. 20, 2025 | ||
| Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |
| Investments, fair value | $ 6 | |||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | whfcl:ElmDebtcoLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Multi-Utilities [Member] | Multi-Utilities [Member] | Multi-Utilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 3.50% | 4.75% | 3.50% | |
| Interest Rate | 10.25% | 8.42% | 10.25% | |
| Acquisition Date | Nov. 20, 2025 | Nov. 20, 2025 | ||
| Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |
| Principal/Share Amount | $ 126 | |||
| Investments, amortized cost | 125 | |||
| Investments, fair value | $ 136 | |||
| Investment, Identifier [Axis]: ELM DebtCo, LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ElmDebtcoLlcMember | whfcl:ElmDebtcoLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Multi-Utilities [Member] | Multi-Utilities [Member] | Multi-Utilities [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.75% | 4.50% | |
| Interest Rate | 8.23% | 8.42% | 8.23% | |
| Acquisition Date | Nov. 20, 2025 | Nov. 20, 2025 | ||
| Maturity Date | Nov. 14, 2031 | Nov. 14, 2031 | Nov. 14, 2031 | |
| Principal/Share Amount | $ 5,515 | $ 5,543 | ||
| Investments, amortized cost | 5,465 | 5,488 | ||
| Investments, fair value | $ 5,515 | $ 5,488 | ||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC (d/b/a EducationDynamics, LLC) Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EddyAcquisitionsLLCMember | whfcl:EddyAcquisitionsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Spread Above Index | 12.00% | 12.00% | 12.00% | |
| Interest Rate | 12.00% | 12.00% | 12.00% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | ||
| Principal/Share Amount | $ 167 | $ 167 | ||
| Investments, amortized cost | $ 167 | $ 167 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | true | false | |
| Investment, Identifier [Axis]: Education Dynamics, LLC Senior Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EducationDynamicsLLCMember | whfcl:EducationDynamicsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | whfcl:SeniorPreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | ||
| Principal/Share Amount | $ 167 | $ 167 | ||
| Investments, amortized cost | 167 | $ 167 | ||
| Investments, fair value | $ 61 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EducationDynamicsLLCMember | whfcl:EducationDynamicsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 12.25% | 12.25% | 12.25% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | ||
| Maturity Date | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | |
| Principal/Share Amount | $ 540 | $ 360 | ||
| Investments, amortized cost | 538 | 358 | ||
| Investments, fair value | $ 542 | $ 320 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.25% | 10.32% | 10.25% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | ||
| Maturity Date | Sep. 15, 2027 | Sep. 15, 2027 | Sep. 15, 2027 | |
| Principal/Share Amount | $ 12,564 | $ 12,592 | ||
| Investments, amortized cost | 12,522 | 12,532 | ||
| Investments, fair value | $ 12,564 | $ 12,137 | ||
| Percent of net assets | 5.00% | 4.70% | 5.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Empire amp; Co Inc. (d/b/a Empire Office, Inc.), First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:EmpireOfficeIncMember | |||
| 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] | Office Services & Supplies | Office Services & Supplies | ||
| 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 6.00% | 6.00% | ||
| Interest Rate | 9.64% | 9.64% | ||
| Acquisition Date | Jun. 01, 2026 | |||
| Maturity Date | May 30, 2031 | May 30, 2031 | ||
| Principal/Share Amount | $ 10,326 | |||
| Investments, amortized cost | 10,123 | |||
| Investments, fair value | $ 10,120 | |||
| Percent of net assets | 4.00% | 4.00% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.41% | 8.57% | 8.41% | |
| Acquisition Date | Dec. 12, 2024 | Dec. 12, 2024 | ||
| Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |
| Principal/Share Amount | $ 665 | $ 667 | ||
| Investments, amortized cost | 659 | 661 | ||
| Investments, fair value | $ 665 | $ 663 | ||
| Investment, Identifier [Axis]: FloWorks International LLC, First Lien Secured 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.41% | 8.57% | 8.41% | |
| Acquisition Date | Dec. 12, 2024 | Dec. 12, 2024 | ||
| Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |
| Principal/Share Amount | $ 5,267 | $ 5,293 | ||
| Investments, amortized cost | 5,226 | 5,248 | ||
| Investments, fair value | $ 5,267 | $ 5,262 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.63% | 10.57% | 10.63% | |
| Acquisition Date | Mar. 11, 2022 | Mar. 11, 2022 | ||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Principal/Share Amount | $ 2,977 | $ 2,993 | ||
| Investments, amortized cost | 2,972 | 2,981 | ||
| Investments, fair value | $ 2,977 | $ 2,993 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.63% | 10.69% | 10.63% | |
| Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | ||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Principal/Share Amount | $ 173 | $ 619 | ||
| Investments, amortized cost | 173 | 617 | ||
| Investments, fair value | $ 174 | $ 619 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.63% | 10.57% | 10.63% | |
| Acquisition Date | Feb. 18, 2022 | Feb. 18, 2022 | ||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |
| Principal/Share Amount | $ 8,868 | $ 8,914 | ||
| Investments, amortized cost | 8,852 | 8,880 | ||
| Investments, fair value | $ 8,868 | $ 8,914 | ||
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | Four Winds Health, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 7.00% | 6.75% | |
| Interest Rate | 10.48% | 10.67% | 10.48% | |
| Acquisition Date | Jul. 31, 2025 | Jul. 31, 2025 | ||
| Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |
| Principal/Share Amount | $ 498 | $ 250 | ||
| Investments, amortized cost | 493 | 248 | ||
| Investments, fair value | $ 527 | $ 272 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | Four Winds Health, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 7.00% | 6.75% | |
| Interest Rate | 10.48% | 10.67% | 10.48% | |
| Acquisition Date | Jul. 31, 2025 | Jul. 31, 2025 | ||
| Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |
| Investments, fair value | $ 10 | $ 8 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Four Winds Health, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Four Winds Health, LLC [Member] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 7.00% | 6.75% | |
| Interest Rate | 10.48% | 10.67% | 10.48% | |
| Acquisition Date | Jul. 31, 2025 | Jul. 31, 2025 | ||
| Maturity Date | Jul. 31, 2029 | Jul. 31, 2029 | Jul. 31, 2029 | |
| Principal/Share Amount | $ 4,342 | $ 4,364 | ||
| Investments, amortized cost | 4,275 | 4,286 | ||
| Investments, fair value | $ 4,360 | $ 4,343 | ||
| Percent of net assets | 1.70% | 1.70% | 1.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.25% | 8.25% | 8.25% | |
| Interest Rate | 11.97% | 12.22% | 11.97% | |
| Acquisition Date | Dec. 23, 2016 | Dec. 23, 2016 | ||
| Maturity Date | Dec. 07, 2026 | Dec. 07, 2026 | Dec. 07, 2026 | |
| Principal/Share Amount | $ 18,552 | $ 19,175 | ||
| Investments, amortized cost | 18,545 | 19,160 | ||
| Investments, fair value | $ 18,552 | $ 19,175 | ||
| Percent of net assets | 7.30% | 7.40% | 7.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | whfcl:G2LatherAcquisitionCorp.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.00% | 5.00% | |
| Interest Rate | 8.64% | 8.72% | 8.64% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Investments, fair value | $ 24 | $ 10 | ||
| 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 | whfcl:G2LatherAcquisitionCorp.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.00% | 5.00% | |
| Interest Rate | 8.64% | 8.72% | 8.64% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Investments, fair value | $ 7 | $ 4 | ||
| 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 | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.00% | 5.00% | |
| Interest Rate | 8.64% | 8.72% | 8.64% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Principal/Share Amount | $ 3,880 | $ 3,900 | ||
| Investments, amortized cost | 3,836 | 3,850 | ||
| Investments, fair value | $ 3,886 | $ 3,873 | ||
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GttCommunicationsGlobalLlcMember | whfcl:GttCommunicationsGlobalLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.65% | 9.73% | 9.65% | |
| Acquisition Date | Apr. 15, 2025 | Apr. 15, 2025 | ||
| Maturity Date | Apr. 15, 2031 | Apr. 15, 2031 | Apr. 15, 2031 | |
| Principal/Share Amount | $ 15,206 | $ 15,283 | ||
| Investments, amortized cost | 14,964 | 15,014 | ||
| Investments, fair value | $ 15,157 | $ 15,129 | ||
| Percent of net assets | 6.00% | 5.80% | 6.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:GulfWindsInternationalAcquisitionLlcMember | whfcl:GulfWindsInternationalAcquisitionLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 7.00% | 7.00% | |
| Interest Rate | 10.64% | 10.72% | 10.64% | |
| Acquisition Date | Dec. 16, 2022 | Dec. 16, 2022 | ||
| Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |
| Principal/Share Amount | $ 706 | $ 605 | ||
| Investments, amortized cost | 697 | 596 | ||
| Investments, fair value | $ 684 | $ 584 | ||
| Percent of net assets | 0.30% | 0.20% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.00% | 7.00% | 7.00% | |
| Interest Rate | 10.64% | 10.72% | 10.64% | |
| Cash interest rate | 9.64% | 9.72% | 9.64% | |
| PIK interest rate | 1.00% | 1.00% | 1.00% | |
| Acquisition Date | Dec. 16, 2022 | Dec. 16, 2022 | ||
| Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |
| Principal/Share Amount | $ 8,955 | $ 8,956 | ||
| Investments, amortized cost | 8,843 | 8,820 | ||
| Investments, fair value | $ 8,704 | $ 8,697 | ||
| Percent of net assets | 3.40% | 3.30% | 3.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: H I G Camarillo, LP, Limited Partners Interests | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HIGCamarilloLpMember | whfcl:HIGCamarilloLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | whfcl:LimitedPartnerInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Acquisition Date | Sep. 25, 2024 | Sep. 25, 2024 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.22% | |||
| Interest Rate | 10.55% | |||
| Acquisition Date | Feb. 18, 2022 | |||
| Maturity Date | Oct. 19, 2026 | |||
| Principal/Share Amount | $ 1,154 | |||
| Investments, amortized cost | 1,150 | |||
| Investments, fair value | $ 1,154 | |||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.25% | |||
| Interest Rate | 10.27% | |||
| Acquisition Date | Feb. 18, 2022 | |||
| Maturity Date | Oct. 19, 2026 | |||
| Principal/Share Amount | $ 700 | |||
| Investments, amortized cost | 698 | |||
| Investments, fair value | $ 701 | |||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:HRGManagementLLCMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.25% | |||
| Interest Rate | 10.27% | |||
| Acquisition Date | Dec. 28, 2021 | |||
| Maturity Date | Oct. 19, 2026 | |||
| Principal/Share Amount | $ 4,602 | |||
| Investments, amortized cost | 4,588 | |||
| Investments, fair value | $ 4,602 | |||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ITSBuyerIncMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.00% | |||
| Interest Rate | 9.83% | |||
| Acquisition Date | Feb. 17, 2022 | |||
| Maturity Date | Jun. 14, 2027 | |||
| Investments, fair value | $ 2 | |||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ITSBuyerIncMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.00% | |||
| Interest Rate | 9.83% | |||
| Acquisition Date | Feb. 17, 2022 | |||
| Maturity Date | Jun. 14, 2027 | |||
| Principal/Share Amount | $ 3,271 | |||
| Investments, amortized cost | 3,262 | |||
| Investments, fair value | $ 3,271 | |||
| Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImageOneIndustriesLLCMember | whfcl:ImageOneIndustriesLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonAUnitsMember | whfcl:CommonAUnitsMember | whfcl:CommonAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| Acquisition Date | Sep. 20, 2019 | Sep. 20, 2019 | ||
| Principal/Share Amount | $ 244 | $ 238 | ||
| Investments, amortized cost | $ 18 | $ 13 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | whfcl:ImpactAdvisorsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.50% | 4.50% | |
| Interest Rate | 8.23% | 8.17% | 8.23% | |
| Acquisition Date | May 01, 2025 | May 01, 2025 | ||
| Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |
| Principal/Share Amount | $ 313 | |||
| Investments, amortized cost | 311 | |||
| Investments, fair value | $ 322 | $ 10 | ||
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | whfcl:ImpactAdvisorsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Technology | Health Care Technology | Health Care Technology | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 3.50% | 4.50% | 3.50% | |
| Interest Rate | 10.25% | 8.17% | 10.25% | |
| Acquisition Date | May 01, 2025 | May 01, 2025 | ||
| Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |
| Principal/Share Amount | $ 280 | |||
| Investments, amortized cost | 278 | |||
| Investments, fair value | $ 281 | $ 4 | ||
| Investment, Identifier [Axis]: Impact Advisors, LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ImpactAdvisorsLlcMember | whfcl:ImpactAdvisorsLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.50% | 4.50% | |
| Interest Rate | 8.23% | 8.17% | 8.23% | |
| Acquisition Date | May 01, 2025 | May 01, 2025 | ||
| Maturity Date | Mar. 21, 2031 | Mar. 21, 2031 | Mar. 21, 2031 | |
| Principal/Share Amount | $ 4,148 | $ 4,169 | ||
| Investments, amortized cost | 4,115 | 4,132 | ||
| Investments, fair value | $ 4,148 | $ 4,169 | ||
| Investment, Identifier [Axis]: Industrial Service Solutions WC, Inc, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IndustrialServiceSolutionsMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | ||
| 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] | Base Rate [Member] | Base Rate [Member] | ||
| Floor | 0.75% | 0.75% | ||
| Spread Above Index | 4.12% | 4.12% | ||
| Interest Rate | 9.08% | 9.08% | ||
| Acquisition Date | Apr. 23, 2026 | |||
| Maturity Date | Feb. 07, 2033 | Feb. 07, 2033 | ||
| Principal/Share Amount | $ 193 | |||
| Investments, amortized cost | 191 | |||
| Investments, fair value | $ 192 | |||
| Investment, Identifier [Axis]: Industrial Service Solutions WC, Inc, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IndustrialServiceSolutionsMember | |||
| 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | ||
| Floor | 0.75% | 0.75% | ||
| Spread Above Index | 4.50% | 4.50% | ||
| Interest Rate | 8.14% | 8.14% | ||
| Acquisition Date | Apr. 23, 2026 | |||
| Maturity Date | Feb. 07, 2033 | Feb. 07, 2033 | ||
| Principal/Share Amount | $ 5,111 | |||
| Investments, amortized cost | 5,062 | |||
| Investments, fair value | $ 5,072 | |||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | Infotree Holdco LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.48% | 9.42% | 9.48% | |
| Acquisition Date | Feb. 19, 2025 | Feb. 19, 2025 | ||
| Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |
| Investments, fair value | $ 2 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | Infotree Holdco LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.48% | 9.42% | 9.48% | |
| Acquisition Date | Mar. 24, 2025 | Mar. 24, 2025 | ||
| Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |
| Investments, fair value | $ 1 | |||
| Investment, Identifier [Axis]: Infotree Holdco LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Infotree Holdco LLC [Member] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.48% | 9.42% | 9.48% | |
| Acquisition Date | Feb. 19, 2025 | Feb. 19, 2025 | ||
| Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |
| Principal/Share Amount | $ 2,933 | $ 2,947 | ||
| Investments, amortized cost | 2,890 | 2,899 | ||
| Investments, fair value | $ 2,891 | $ 2,907 | ||
| Percent of net assets | 1.10% | 1.10% | 1.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.48% | 9.42% | 9.48% | |
| Acquisition Date | Mar. 24, 2025 | Mar. 24, 2025 | ||
| Maturity Date | Feb. 19, 2030 | Feb. 19, 2030 | Feb. 19, 2030 | |
| Principal/Share Amount | $ 2,514 | $ 2,526 | ||
| Investments, amortized cost | 2,477 | 2,484 | ||
| Investments, fair value | $ 2,478 | $ 2,492 | ||
| Investment, Identifier [Axis]: Intermedia Cloud Communications, Inc. (d/b/a Intermedia.net, Inc.),First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IntermediaCloudCommunicationsIncMember | |||
| 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] | Air Freight & Logistics | Air Freight & Logistics | ||
| 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] | ||
| Floor | 0.75% | 0.75% | ||
| Spread Above Index | 5.50% | 5.50% | ||
| Interest Rate | 9.16% | 9.16% | ||
| Acquisition Date | May 27, 2026 | |||
| Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | ||
| Principal/Share Amount | $ 6,667 | |||
| Investments, amortized cost | 6,601 | |||
| Investments, fair value | $ 6,600 | |||
| Percent of net assets | 2.60% | 2.60% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Intermedia Cloud Communications, Inc. (d/b/a Intermedia.net, Inc.), First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IntermediaCloudCommunicationsIncMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | ||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | ||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | ||
| 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] | ||
| Floor | 0.75% | 0.75% | ||
| Spread Above Index | 5.50% | 5.50% | ||
| Interest Rate | 9.16% | 9.16% | ||
| Acquisition Date | May 27, 2026 | |||
| Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Island Energy Services, LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IslandEnergyServicesLlcMember | |||
| 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] | Oil & Gas Storage & Transportation | Oil & Gas Storage & Transportation | ||
| 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] | ||
| Floor | 0.50% | 0.50% | ||
| Spread Above Index | 5.75% | 5.75% | ||
| Interest Rate | 9.43% | 9.43% | ||
| Acquisition Date | Jul. 16, 2025 | |||
| Maturity Date | Jul. 16, 2032 | Jul. 16, 2032 | ||
| Principal/Share Amount | $ 10,419 | |||
| Investments, amortized cost | 10,056 | |||
| Investments, fair value | $ 10,266 | |||
| Percent of net assets | 4.10% | 4.10% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | whfcl:JuniperLandscapingHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.41% | 9.56% | 9.41% | |
| Acquisition Date | May 23, 2025 | May 23, 2025 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 1,997 | $ 890 | ||
| Investments, amortized cost | 1,984 | 884 | ||
| Investments, fair value | $ 2,008 | $ 910 | ||
| Percent of net assets | 0.80% | 0.40% | 0.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.39% | 9.43% | 9.39% | |
| Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 2,307 | $ 2,319 | ||
| Investments, amortized cost | 2,299 | 2,309 | ||
| Investments, fair value | $ 2,307 | $ 2,319 | ||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:JuniperLandscapingHoldingsLLCMember | whfcl:JuniperLandscapingHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.42% | 9.51% | 9.42% | |
| Acquisition Date | May 23, 2025 | May 23, 2025 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 403 | $ 238 | ||
| Investments, amortized cost | 399 | 235 | ||
| Investments, fair value | $ 407 | $ 246 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.42% | 9.52% | 9.42% | |
| Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 525 | $ 310 | ||
| Investments, amortized cost | 523 | 309 | ||
| Investments, fair value | $ 527 | $ 314 | ||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.39% | 9.43% | 9.39% | |
| Acquisition Date | May 23, 2025 | May 23, 2025 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 452 | $ 454 | ||
| Investments, amortized cost | 448 | 449 | ||
| Investments, fair value | $ 452 | $ 454 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.39% | 9.43% | 9.39% | |
| Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | ||
| Maturity Date | Dec. 29, 2027 | Dec. 29, 2027 | Dec. 29, 2027 | |
| Principal/Share Amount | $ 10,907 | $ 10,964 | ||
| Investments, amortized cost | 10,872 | 10,917 | ||
| Investments, fair value | $ 10,907 | $ 10,964 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.14% | 10.38% | 10.14% | |
| Acquisition Date | Nov. 27, 2023 | Nov. 27, 2023 | ||
| Maturity Date | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | |
| Investments, fair value | $ 8 | $ 10 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.14% | 10.38% | 10.14% | |
| Acquisition Date | Nov. 27, 2023 | Nov. 27, 2023 | ||
| Maturity Date | Nov. 09, 2028 | Nov. 09, 2028 | Nov. 09, 2028 | |
| Principal/Share Amount | $ 6,258 | $ 6,290 | ||
| Investments, amortized cost | 6,199 | 6,218 | ||
| Investments, fair value | $ 6,258 | $ 6,290 | ||
| Investment, Identifier [Axis]: Kelso Industries LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.42% | 9.57% | 9.42% | |
| Acquisition Date | Dec. 26, 2024 | Dec. 26, 2024 | ||
| Maturity Date | Dec. 31, 2029 | Dec. 31, 2029 | Dec. 31, 2029 | |
| Principal/Share Amount | $ 5,127 | $ 4,785 | ||
| Investments, amortized cost | 5,057 | 4,710 | ||
| Investments, fair value | $ 5,127 | $ 4,823 | ||
| Percent of net assets | 2.00% | 1.90% | 2.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Kelso Industries LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.75% | 5.75% | ||
| Interest Rate | 9.42% | 9.42% | ||
| Acquisition Date | Jan. 27, 2026 | |||
| Maturity Date | Dec. 31, 2029 | Dec. 31, 2029 | ||
| Investments, fair value | $ 13 | |||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Keras Holdings, LLC Shares | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:KerasHoldingsLLCMember | whfcl:KerasHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SharesMember | Common Stock [Member] | whfcl:SharesMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Acquisition Date | Dec. 31, 2020 | Dec. 31, 2020 | ||
| Principal/Share Amount | $ 496 | $ 496 | ||
| Investments, amortized cost | 496 | 496 | ||
| Investments, fair value | $ 50 | $ 446 | ||
| Percent of net assets | 0.20% | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.25% | |||
| Interest Rate | 10.32% | |||
| Acquisition Date | Jun. 22, 2021 | |||
| Maturity Date | 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] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Paper & Plastic Packaging Products & Materials | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 6.25% | |||
| Interest Rate | 10.32% | |||
| Acquisition Date | Jun. 22, 2021 | |||
| Maturity Date | Feb. 24, 2026 | |||
| Principal/Share Amount | $ 7,900 | |||
| Investments, amortized cost | 7,895 | |||
| Investments, fair value | $ 7,900 | |||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LeviathanIntermediateHoldcoLlcMember | whfcl:LeviathanIntermediateHoldcoLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure 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] | |
| Floor | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.73% | 9.67% | 9.73% | |
| Acquisition Date | Dec. 27, 2022 | Dec. 27, 2022 | ||
| Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |
| Investments, fair value | $ 3 | $ 4 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure 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] | |
| Floor | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.73% | 9.67% | 9.73% | |
| Acquisition Date | Dec. 27, 2022 | Dec. 27, 2022 | ||
| Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |
| Principal/Share Amount | $ 13,575 | $ 13,645 | ||
| Investments, amortized cost | 13,456 | 13,486 | ||
| Investments, fair value | $ 13,519 | $ 13,584 | ||
| Percent of net assets | 5.30% | 5.20% | 5.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LiftBrandsIncMember | whfcl:LiftBrandsIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | whfcl:FirstLienSecuredTermLoanAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.24% | 11.32% | 11.24% | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | ||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 5,001 | $ 5,120 | ||
| Investments, amortized cost | 5,001 | 5,119 | ||
| Investments, fair value | $ 5,001 | $ 5,120 | ||
| Percent of net assets | 2.00% | 2.00% | 2.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:LiftBrandsIncMember | whfcl:LiftBrandsIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | whfcl:FirstLienSecuredTermLoanBMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Spread Above Index | 9.50% | 9.50% | 9.50% | |
| Interest Rate | 9.50% | 9.50% | ||
| PIK interest rate | 9.50% | |||
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | ||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 1,779 | $ 1,753 | ||
| Investments, amortized cost | 1,779 | 1,752 | ||
| Investments, fair value | $ 1,779 | $ 1,753 | ||
| Percent of net assets | 0.70% | 0.70% | 0.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: LogicMonitor, Inc. - First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | LogicMonitor, Inc. [Member] | LogicMonitor, Inc. [Member] | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.16% | 9.34% | 9.16% | |
| Acquisition Date | Nov. 19, 2024 | Nov. 19, 2024 | ||
| Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |
| Principal/Share Amount | $ 8,220 | $ 8,220 | ||
| Investments, amortized cost | 8,138 | 8,130 | ||
| Investments, fair value | $ 8,220 | $ 8,186 | ||
| Percent of net assets | 3.30% | 3.20% | 3.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: LogicMonitor, Inc. First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | LogicMonitor, Inc. [Member] | LogicMonitor, Inc. [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.16% | 9.34% | 9.16% | |
| Acquisition Date | Dec. 02, 2025 | Dec. 02, 2025 | ||
| Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |
| Investments, fair value | $ 5 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: LogicMonitor, Inc.- First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | LogicMonitor, Inc. [Member] | LogicMonitor, Inc. [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.16% | 9.34% | 9.16% | |
| Acquisition Date | Nov. 19, 2024 | Nov. 19, 2024 | ||
| Maturity Date | Nov. 19, 2031 | Nov. 19, 2031 | Nov. 19, 2031 | |
| Investments, fair value | $ 7 | $ 5 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: M2S Group Intermediate Holdings, Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Paper Products | Paper Products | Paper 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] | |
| Floor | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.41% | 8.59% | 8.41% | |
| Acquisition Date | Aug. 22, 2024 | Aug. 22, 2024 | ||
| Maturity Date | Aug. 25, 2031 | Aug. 25, 2031 | Aug. 25, 2031 | |
| Principal/Share Amount | $ 8,966 | $ 9,368 | ||
| Investments, amortized cost | 8,503 | 8,838 | ||
| Investments, fair value | $ 8,892 | $ 9,276 | ||
| Percent of net assets | 3.50% | 3.60% | 3.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Application Software | Air Freight & Logistics | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| Interest Rate | 11.94% | 12.03% | 11.94% | |
| Acquisition Date | Oct. 13, 2022 | Oct. 13, 2022 | ||
| Maturity Date | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | |
| Principal/Share Amount | $ 9,156 | $ 9,204 | ||
| Investments, amortized cost | 9,097 | 9,122 | ||
| Investments, fair value | $ 9,128 | $ 9,184 | ||
| Percent of net assets | 3.60% | 3.50% | 3.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.00% | 5.25% | |
| Interest Rate | 8.89% | 8.74% | 8.89% | |
| Acquisition Date | Apr. 08, 2025 | Apr. 08, 2025 | ||
| Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | |
| Principal/Share Amount | $ 488 | $ 283 | ||
| Investments, amortized cost | 486 | 281 | ||
| Investments, fair value | $ 479 | $ 300 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | ||
| 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.25% | 5.25% | ||
| Interest Rate | 8.91% | 8.91% | ||
| Acquisition Date | May 10, 2023 | |||
| Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | ||
| Principal/Share Amount | $ 1,315 | |||
| Investments, amortized cost | 1,297 | |||
| Investments, fair value | $ 1,302 | |||
| Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Delayed Draw Loan, One | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | MGT Merger Target, LLC [Member] | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 5.00% | |||
| Interest Rate | 8.72% | |||
| Acquisition Date | May 10, 2023 | |||
| Maturity Date | Apr. 10, 2029 | |||
| Principal/Share Amount | $ 1,322 | |||
| Investments, amortized cost | 1,300 | |||
| Investments, fair value | $ 1,322 | |||
| 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] | MGT Merger Target, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.25% | 4.00% | 4.25% | |
| Interest Rate | 11.00% | 10.75% | 11.00% | |
| Acquisition Date | Apr. 07, 2025 | Apr. 07, 2025 | ||
| Maturity Date | Apr. 10, 2028 | Apr. 10, 2028 | Apr. 10, 2028 | |
| Principal/Share Amount | $ 676 | $ 714 | ||
| Investments, amortized cost | 670 | 705 | ||
| Investments, fair value | $ 670 | $ 715 | ||
| 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] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.00% | 5.25% | |
| Interest Rate | 8.91% | 8.72% | 8.91% | |
| Acquisition Date | May 10, 2023 | May 10, 2023 | ||
| Maturity Date | Apr. 10, 2029 | Apr. 10, 2029 | Apr. 10, 2029 | |
| Principal/Share Amount | $ 8,512 | $ 8,555 | ||
| Investments, amortized cost | 8,406 | 8,430 | ||
| Investments, fair value | $ 8,428 | $ 8,567 | ||
| Investment, Identifier [Axis]: Mamp;M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.73% | 9.67% | 9.73% | |
| Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | ||
| Maturity Date | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | |
| Principal/Share Amount | $ 76 | |||
| Investments, amortized cost | 75 | |||
| Investments, fair value | $ 78 | $ 4 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Mamp;M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.73% | 9.67% | 9.73% | |
| Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | ||
| Maturity Date | Apr. 09, 2029 | Apr. 09, 2029 | Apr. 09, 2029 | |
| Principal/Share Amount | $ 4,751 | $ 4,827 | ||
| Investments, amortized cost | 4,686 | 4,748 | ||
| Investments, fair value | $ 4,751 | $ 4,827 | ||
| Percent of net assets | 1.90% | 1.90% | 1.90% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | whfcl:MarkiMicrowaveLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.00% | 4.25% | 4.00% | |
| Interest Rate | 7.73% | 8.12% | 7.73% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |
| Investments, fair value | $ 6 | |||
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | whfcl:MarkiMicrowaveLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.00% | 4.25% | 4.00% | |
| Interest Rate | 7.73% | 8.12% | 7.73% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |
| Investments, fair value | $ 6 | |||
| Investment, Identifier [Axis]: Marki Microwave, LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MarkiMicrowaveLlcMember | whfcl:MarkiMicrowaveLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.00% | 4.25% | 4.00% | |
| Interest Rate | 7.73% | 8.12% | 7.73% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 21, 2031 | Nov. 21, 2031 | Nov. 21, 2031 | |
| Principal/Share Amount | $ 6,030 | $ 6,045 | ||
| Investments, amortized cost | 5,976 | 5,986 | ||
| Investments, fair value | $ 5,995 | $ 5,985 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Maturity Date | May 03, 2027 | Jul. 01, 2026 | May 03, 2027 | |
| Investments, fair value | $ (25) | $ (39) | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Maturity Date | May 03, 2027 | Jul. 01, 2026 | May 03, 2027 | |
| Principal/Share Amount | $ 17,643 | $ 18,019 | ||
| Investments, amortized cost | 17,643 | 18,019 | ||
| Investments, fair value | $ 17,002 | $ 17,299 | ||
| Investment, Identifier [Axis]: Max Solutions Inc. Common Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | whfcl:MaxSolutionsIncMember | ||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Acquisition Date | Sep. 29, 2022 | Sep. 29, 2022 | ||
| Principal/Share Amount | $ 4 | $ 4 | ||
| Investments, amortized cost | $ 400 | $ 400 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | whfcl:MaxSolutionsIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.90% | 6.90% | 6.90% | |
| Interest Rate | 8.66% | 10.89% | 8.66% | |
| Acquisition Date | Oct. 07, 2022 | Oct. 07, 2022 | ||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |
| Principal/Share Amount | $ 408 | $ 410 | ||
| Investments, amortized cost | 406 | 407 | ||
| Investments, fair value | $ 408 | $ 408 | ||
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | whfcl:MaxSolutionsIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Overnight Repo Rate Average | Canadian Overnight Repo Rate Average | Canadian Overnight Repo Rate Average | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.90% | 6.90% | 6.90% | |
| Interest Rate | 8.66% | 10.89% | 8.66% | |
| Acquisition Date | Oct. 07, 2022 | Oct. 07, 2022 | ||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |
| Investments, fair value | $ 1 | $ 1 | ||
| Investment, Identifier [Axis]: Max Solutions, Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxSolutionsIncMember | whfcl:MaxSolutionsIncMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.91% | 6.91% | 6.91% | |
| Interest Rate | 8.66% | 10.90% | 8.66% | |
| Acquisition Date | Oct. 07, 2022 | Oct. 07, 2022 | ||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |
| Principal/Share Amount | $ 6,416 | $ 6,451 | ||
| Investments, amortized cost | 6,368 | 6,392 | ||
| Investments, fair value | $ 6,416 | $ 6,420 | ||
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | whfcl:MaxorAcquisitionInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.98% | 9.82% | 9.98% | |
| Acquisition Date | Dec. 27, 2024 | Dec. 27, 2024 | ||
| Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |
| Principal/Share Amount | $ 933 | $ 938 | ||
| Investments, amortized cost | 927 | 930 | ||
| Investments, fair value | $ 933 | $ 942 | ||
| Percent of net assets | 0.40% | 0.40% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.98% | 9.82% | 9.98% | |
| Acquisition Date | Apr. 11, 2023 | Apr. 11, 2023 | ||
| Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |
| Principal/Share Amount | $ 4,925 | $ 4,951 | ||
| Investments, amortized cost | 4,860 | 4,872 | ||
| Investments, fair value | $ 4,925 | $ 4,974 | ||
| Investment, Identifier [Axis]: Maxor Acquisition, Inc.First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MaxorAcquisitionInc.Member | whfcl:MaxorAcquisitionInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.98% | 9.82% | 9.98% | |
| Acquisition Date | Apr. 11, 2023 | Apr. 11, 2023 | ||
| Maturity Date | Mar. 01, 2029 | Mar. 01, 2029 | Mar. 01, 2029 | |
| Investments, fair value | $ 6 | $ 8 | ||
| Investment, Identifier [Axis]: Media Source, LLC (d/b/a Media Source Inc.) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | us-gaap:InvestmentAffiliatedIssuerMember | Non-controlled/non-affiliate company investments | us-gaap:InvestmentAffiliatedIssuerMember | |
| Investment, Issuer Name [Extensible Enumeration] | Media Source, LLC [Member] | Media Source, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.44% | 9.54% | 9.44% | |
| Cash interest rate | 4.77% | |||
| PIK interest rate | 4.77% | |||
| Acquisition Date | Sep. 01, 2025 | Sep. 01, 2025 | ||
| Maturity Date | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | |
| Principal/Share Amount | $ 150 | |||
| Investments, amortized cost | 147 | |||
| Investments, fair value | $ 149 | $ 17 | ||
| Percent of net assets | 0.10% | 0.10% | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Media Source, LLC (d/b/a Media Source Inc.) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | us-gaap:InvestmentAffiliatedIssuerMember | Non-controlled/non-affiliate company investments | us-gaap:InvestmentAffiliatedIssuerMember | |
| Investment, Issuer Name [Extensible Enumeration] | Media Source, LLC [Member] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.42% | 9.54% | 9.42% | |
| Cash interest rate | 4.71% | 4.77% | 4.71% | |
| PIK interest rate | 4.71% | 4.77% | 4.71% | |
| Acquisition Date | Sep. 01, 2025 | Sep. 01, 2025 | ||
| Maturity Date | Aug. 30, 2030 | Aug. 30, 2030 | Aug. 30, 2030 | |
| Principal/Share Amount | $ 4,323 | $ 4,242 | ||
| Investments, amortized cost | 4,323 | 4,242 | ||
| Investments, fair value | $ 4,259 | $ 4,242 | ||
| Percent of net assets | 1.70% | 1.60% | 1.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Merriman Holdings LP (d/b/a Escalent, Inc.) Class A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MerrimanHoldingsLPMember | whfcl:MerrimanHoldingsLPMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Acquisition Date | Apr. 07, 2023 | Apr. 07, 2023 | ||
| Principal/Share Amount | $ 327 | $ 327 | ||
| Investments, amortized cost | 333 | 333 | ||
| Investments, fair value | $ 286 | $ 312 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Meta Buyer LLC First Lien Secured Term Loan Two | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 0.75% | |||
| Spread Above Index | 5.25% | |||
| Interest Rate | 8.94% | |||
| Acquisition Date | Dec. 22, 2025 | |||
| Maturity Date | Dec. 22, 2031 | |||
| Principal/Share Amount | $ 6,720 | |||
| Investments, amortized cost | 6,653 | |||
| Investments, fair value | $ 6,653 | |||
| Percent of net assets | 2.60% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Pharmaceuticals | Personal 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.93% | 8.94% | 8.93% | |
| Acquisition Date | Mar. 30, 2026 | Dec. 22, 2025 | ||
| Maturity Date | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | |
| Principal/Share Amount | $ 1,607 | |||
| Investments, amortized cost | 1,597 | |||
| Investments, fair value | $ 1,599 | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | whfcl:MetaBuyerLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Pharmaceuticals | Personal 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.97% | 8.94% | 8.97% | |
| Acquisition Date | Mar. 30, 2026 | Dec. 22, 2025 | ||
| Maturity Date | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | |
| Principal/Share Amount | $ 340 | |||
| Investments, amortized cost | 337 | |||
| Investments, fair value | $ 342 | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MetaBuyerLLCMember | |||
| 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] | Personal Products | Personal 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] | ||
| Floor | 0.75% | 0.75% | ||
| Spread Above Index | 5.25% | 5.25% | ||
| Interest Rate | 8.93% | 8.93% | ||
| Acquisition Date | Feb. 04, 2026 | |||
| Maturity Date | Dec. 22, 2031 | Dec. 22, 2031 | ||
| Principal/Share Amount | $ 6,686 | |||
| Investments, amortized cost | 6,625 | |||
| Investments, fair value | $ 6,647 | |||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Term Loan One | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Pharmaceuticals | Personal Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate Three Month Term [Member] | Euro Interbank Offered Rate Three Month Term [Member] | Euro Interbank Offered Rate Three Month Term [Member] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 7.33% | 7.29% | 7.33% | |
| Acquisition Date | Feb. 04, 2026 | Dec. 22, 2025 | ||
| Maturity Date | Dec. 22, 2031 | Dec. 22, 2031 | Dec. 22, 2031 | |
| Principal/Share Amount | $ 4,621 | € 4,609 | ||
| Investments, amortized cost | $ 5,391 | 5,378 | ||
| Investments, fair value | $ 5,234 | $ 5,374 | ||
| Percent of net assets | 2.10% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.24% | 11.32% | 11.24% | |
| Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | ||
| Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Principal/Share Amount | $ 642 | $ 639 | ||
| Investments, amortized cost | 634 | 629 | ||
| Investments, fair value | $ 644 | $ 639 | ||
| Percent of net assets | 0.30% | 0.20% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.27% | 7.50% | 7.27% | |
| Interest Rate | 11.70% | 11.32% | 11.70% | |
| Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | ||
| Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Principal/Share Amount | $ 501 | $ 572 | ||
| Investments, amortized cost | 495 | 563 | ||
| Investments, fair value | $ 502 | $ 572 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | Oil & Gas Refining & Marketing | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.24% | 11.32% | 11.24% | |
| Acquisition Date | Dec. 22, 2023 | Dec. 22, 2023 | ||
| Maturity Date | Dec. 22, 2028 | Dec. 22, 2028 | Dec. 22, 2028 | |
| Principal/Share Amount | $ 9,232 | $ 9,188 | ||
| Investments, amortized cost | 9,119 | 9,051 | ||
| Investments, fair value | $ 9,262 | $ 9,193 | ||
| Percent of net assets | 3.70% | 3.50% | 3.70% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MonarchCollectiveHoldingsLlcMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.50% | |||
| Spread Above Index | 7.25% | |||
| Interest Rate | 10.97% | |||
| Acquisition Date | Jan. 10, 2024 | |||
| Maturity Date | Jan. 10, 2029 | |||
| Principal/Share Amount | $ 1,579 | |||
| Investments, amortized cost | 1,562 | |||
| Investments, fair value | $ 1,553 | |||
| Percent of net assets | 0.60% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MonarchCollectiveHoldingsLlcMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.50% | |||
| Spread Above Index | 7.25% | |||
| Interest Rate | 10.92% | |||
| Acquisition Date | Jan. 10, 2024 | |||
| Maturity Date | Jan. 10, 2029 | |||
| Principal/Share Amount | $ 9,212 | |||
| Investments, amortized cost | 9,073 | |||
| Investments, fair value | $ 9,061 | |||
| Percent of net assets | 3.50% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MotivationalCIVLLCMember | whfcl:MotivationalCIVLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | ||
| Principal/Share Amount | $ 1,250 | $ 1,250 | ||
| Investments, amortized cost | 1,250 | 1,250 | ||
| Investments, fair value | $ 951 | $ 774 | ||
| Percent of net assets | 0.40% | 0.30% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Motivational Marketing, LLC (d/b/a Motivational Fulfillment), LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:MotivationalMarketingLLCMember | whfcl:MotivationalMarketingLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Canadian Overnight Repo Rate Average Three Months Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.13% | 10.48% | 10.13% | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | ||
| Maturity Date | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2028 | |
| Principal/Share Amount | $ 945 | $ 630 | ||
| Investments, amortized cost | 940 | 626 | ||
| Investments, fair value | $ 949 | $ 637 | ||
| Percent of net assets | 0.40% | 0.20% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Motivational Marketing, LLC (d/b/a Motivational Fulfillment), LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.13% | 10.37% | 10.13% | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | ||
| Maturity Date | Jul. 12, 2028 | Jul. 12, 2028 | Jul. 12, 2028 | |
| Principal/Share Amount | $ 13,109 | $ 13,175 | ||
| Investments, amortized cost | 13,052 | 13,104 | ||
| Investments, fair value | $ 13,109 | $ 13,135 | ||
| Percent of net assets | 5.20% | 5.00% | 5.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: NM Z Holdco Inc First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NmZHoldcoInc.Member | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | ||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | ||
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | ||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Prime Rate [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 6.50% | 6.50% | ||
| Interest Rate | 13.25% | 13.25% | ||
| Cash interest rate | 10.75% | 10.75% | ||
| PIK interest rate | 2.50% | 2.50% | ||
| Acquisition Date | Mar. 16, 2026 | |||
| Maturity Date | Jun. 30, 2031 | Jun. 30, 2031 | ||
| Investments, fair value | $ 6 | |||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| 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] | NM Z Holdco Inc Zep, Inc [Member] | NM Z Holdco Inc Zep, Inc [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.00% | 5.00% | |
| Interest Rate | 8.73% | 8.67% | 8.73% | |
| Acquisition Date | Mar. 16, 2026 | Aug. 12, 2025 | ||
| Maturity Date | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | |
| Investments, fair value | $ 7 | $ 6 | ||
| 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] | NM Z Holdco Inc Zep, Inc [Member] | NM Z Holdco Inc Zep, Inc [Member] | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.00% | 5.00% | 5.00% | |
| Interest Rate | 8.73% | 8.67% | 8.73% | |
| Acquisition Date | Aug. 12, 2025 | Aug. 12, 2025 | ||
| Maturity Date | Jun. 30, 2031 | Jun. 30, 2031 | Jun. 30, 2031 | |
| Principal/Share Amount | $ 10,336 | $ 10,388 | ||
| Investments, amortized cost | 10,250 | 10,293 | ||
| Investments, fair value | $ 10,412 | $ 10,378 | ||
| Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.63% | 10.57% | 10.63% | |
| Acquisition Date | Aug. 27, 2021 | Aug. 27, 2021 | ||
| Maturity Date | Aug. 28, 2028 | Aug. 27, 2026 | Aug. 28, 2028 | |
| Principal/Share Amount | $ 7,927 | $ 8,073 | ||
| Investments, amortized cost | 7,922 | 8,060 | ||
| Investments, fair value | $ 7,903 | $ 8,037 | ||
| Percent of net assets | 3.10% | 3.10% | 3.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: NPAV Lessor Corp. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | whfcl:NPAVLessorCorp.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | Real Estate Services [Member] | Real Estate 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | ||
| Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |
| Principal/Share Amount | $ 725 | $ 725 | ||
| Investments, amortized cost | 723 | 722 | ||
| Investments, fair value | $ 678 | $ 660 | ||
| Investment, Identifier [Axis]: NPAV Lessor Corp. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NPAVLessorCorp.Member | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Services [Member] | Real Estate Services [Member] | Real Estate 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Mar. 01, 2022 | Mar. 01, 2022 | ||
| Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |
| Principal/Share Amount | $ 5,314 | $ 5,517 | ||
| Investments, amortized cost | 5,302 | 5,493 | ||
| Investments, fair value | $ 4,969 | $ 5,022 | ||
| Investment, Identifier [Axis]: New American Crafts Holdings, LLC Class A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:NewAmericanCraftsHoldingsLlcMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | |||
| Investment, Identifier [Axis]: Oil amp; Gas Storage amp; Transportation First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:IslandEnergyServicesLlcMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Oil & Gas Storage & Transportation | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 0.50% | |||
| Spread Above Index | 5.75% | |||
| Interest Rate | 9.64% | |||
| Acquisition Date | Jul. 16, 2025 | |||
| Maturity Date | Jul. 16, 2032 | |||
| Principal/Share Amount | $ 10,472 | |||
| Investments, amortized cost | 10,077 | |||
| Investments, fair value | $ 10,158 | |||
| Percent of net assets | 3.90% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | Panos Brands, Llc [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.75% | 4.75% | |
| Interest Rate | 8.66% | 9.48% | 8.66% | |
| Acquisition Date | Jun. 14, 2024 | May 14, 2024 | ||
| Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Principal/Share Amount | $ 61 | |||
| Investments, amortized cost | 60 | |||
| Investments, fair value | $ 66 | $ 6 | ||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan One | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | Panos Brands, Llc [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.75% | 4.75% | |
| Interest Rate | 11.50% | 9.48% | 11.50% | |
| Acquisition Date | May 14, 2024 | Jun. 14, 2024 | ||
| Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Principal/Share Amount | $ 55 | |||
| Investments, amortized cost | 54 | |||
| Investments, fair value | $ 59 | $ 6 | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| 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) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.75% | 5.75% | ||
| Interest Rate | 8.66% | 8.66% | ||
| Acquisition Date | Jun. 14, 2024 | |||
| Maturity Date | May 14, 2029 | May 14, 2029 | ||
| Principal/Share Amount | $ 3,963 | |||
| Investments, amortized cost | 3,918 | |||
| Investments, fair value | $ 3,963 | |||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan One | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.39% | 9.48% | 9.39% | |
| Acquisition Date | May 14, 2024 | Jun. 14, 2024 | ||
| Maturity Date | May 14, 2029 | May 14, 2029 | May 14, 2029 | |
| Principal/Share Amount | $ 3,567 | $ 4,475 | ||
| Investments, amortized cost | 3,526 | 4,414 | ||
| Investments, fair value | $ 3,567 | $ 4,475 | ||
| Percent of net assets | 1.40% | 1.40% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan, One 05/14/29 | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | Panos Brands, Llc [Member] | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 5.75% | |||
| Interest Rate | 9.48% | |||
| Acquisition Date | May 14, 2024 | |||
| Maturity Date | May 14, 2029 | |||
| Principal/Share Amount | $ 4,027 | |||
| Investments, amortized cost | 3,973 | |||
| Investments, fair value | $ 4,027 | |||
| Percent of net assets | 1.60% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: PFB Holding Company, LLC Class A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PfbHoldingCompanyLlcMember | whfcl:PFBHoldcoIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | ||
| Principal/Share Amount | $ 1 | $ 1 | ||
| Investments, amortized cost | $ 24 | $ 24 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: PGI Parent LLC (d/b/a Prime Electric, Inc.), First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PgiParentLlcMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 5.00% | |||
| Interest Rate | 8.67% | |||
| Acquisition Date | Dec. 31, 2025 | |||
| Maturity Date | Dec. 31, 2031 | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: PGI Parent LLC (d/b/a Prime Electric, Inc.), First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PgiParentLlcMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 1.00% | |||
| Spread Above Index | 5.00% | |||
| Interest Rate | 8.67% | |||
| Acquisition Date | Dec. 31, 2025 | |||
| Maturity Date | Dec. 31, 2031 | |||
| Principal/Share Amount | $ 5,077 | |||
| Investments, amortized cost | 5,026 | |||
| Investments, fair value | $ 5,026 | |||
| Percent of net assets | 1.90% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: PGI Parent LLC, 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 | ||
| 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] | Prime Rate [Member] | Prime Rate [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 4.00% | 4.00% | ||
| Interest Rate | 10.75% | 10.75% | ||
| Acquisition Date | Jan. 16, 2026 | |||
| Maturity Date | Dec. 31, 2031 | Dec. 31, 2031 | ||
| Principal/Share Amount | $ 375 | |||
| Investments, amortized cost | 372 | |||
| Investments, fair value | $ 376 | |||
| Investment, Identifier [Axis]: PGI Parent LLC, 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] | ||
| 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.00% | 5.00% | ||
| Interest Rate | 8.73% | 8.73% | ||
| Acquisition Date | Jan. 16, 2026 | |||
| Maturity Date | Dec. 31, 2031 | Dec. 31, 2031 | ||
| Principal/Share Amount | $ 5,052 | |||
| Investments, amortized cost | 5,005 | |||
| Investments, fair value | $ 5,027 | |||
| Investment, Identifier [Axis]: Patagonia Holdco LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PatagoniaHoldcoLLCMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Integrated Telecommunication Services | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 0.50% | |||
| Spread Above Index | 5.75% | |||
| Interest Rate | 9.62% | |||
| Acquisition Date | Aug. 05, 2022 | |||
| Maturity Date | Aug. 01, 2029 | |||
| Principal/Share Amount | $ 14,150 | |||
| Investments, amortized cost | 12,839 | |||
| Investments, fair value | $ 11,603 | |||
| Percent of net assets | 4.50% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.50% | 4.50% | |
| Interest Rate | 8.17% | 8.20% | 8.17% | |
| Acquisition Date | Oct. 31, 2023 | Oct. 31, 2023 | ||
| Maturity Date | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | |
| Investments, fair value | $ 10 | $ 9 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.50% | 4.50% | 4.50% | |
| Interest Rate | 8.17% | 8.20% | 8.17% | |
| Acquisition Date | Oct. 31, 2023 | Oct. 31, 2023 | ||
| Maturity Date | Oct. 26, 2028 | Oct. 26, 2028 | Oct. 26, 2028 | |
| Principal/Share Amount | $ 12,247 | $ 12,389 | ||
| Investments, amortized cost | 12,162 | 12,284 | ||
| Investments, fair value | $ 12,247 | $ 12,332 | ||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | |||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | ||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Preferred Equity | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | |||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | ||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | whfcl:PlaymonsterGroupEquityIncMember | ||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | |
| Acquisition Date | Jan. 24, 2022 | Jan. 24, 2022 | ||
| Principal/Share Amount | $ 72 | $ 72 | ||
| Investments, amortized cost | $ 460 | $ 460 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupEquityIncMember | whfcl:PlaymonsterGroupEquityIncMember | ||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | |
| Spread Above Index | 14.00% | 14.00% | 14.00% | |
| PIK interest rate | 14.00% | 14.00% | 14.00% | |
| Acquisition Date | Jan. 24, 2022 | Jan. 24, 2022 | ||
| Principal/Share Amount | $ 36 | $ 36 | ||
| Investments, amortized cost | $ 3,600 | $ 3,600 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | true | false | |
| Investment, Identifier [Axis]: Playmonster Group LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 9.00% | 9.00% | 9.00% | |
| PIK interest rate | 12.81% | 12.99% | 12.81% | |
| Acquisition Date | Jun. 07, 2021 | Jun. 07, 2021 | ||
| Maturity Date | Jun. 29, 2028 | Jun. 08, 2026 | Jun. 29, 2028 | |
| Principal/Share Amount | $ 5,964 | $ 5,595 | ||
| Investments, amortized cost | 3,661 | 3,661 | ||
| Investments, fair value | $ 2,426 | $ 1,729 | 1,635 | |
| Percent of net assets | 1.00% | 0.70% | 1.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PlaymonsterGroupLLCMember | whfcl:PlaymonsterGroupLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | whfcl:PriorityFirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.72% | 6.75% | 6.72% | |
| PIK interest rate | 10.10% | 10.74% | 10.10% | |
| Acquisition Date | Dec. 09, 2022 | Dec. 09, 2022 | ||
| Maturity Date | Jun. 29, 2028 | Jun. 08, 2026 | Jun. 29, 2028 | |
| Principal/Share Amount | $ 1,592 | $ 1,442 | ||
| Investments, amortized cost | 1,589 | 1,438 | ||
| Investments, fair value | $ 1,592 | $ 1,355 | 1,172 | |
| Percent of net assets | 0.60% | 0.50% | 0.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Pressurized Holdings, LLC Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PressurizedHoldingsLlcMember | whfcl:PressurizedHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | |
| Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | ||
| Investments, fair value | $ 1,944 | |||
| Percent of net assets | 0.80% | 0.80% | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Pressurized Holdings, LLC Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:PressurizedHoldingsLlcMember | whfcl:PressurizedHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | |
| Spread Above Index | 14.00% | 14.00% | 14.00% | |
| PIK interest rate | 14.00% | 14.00% | 14.00% | |
| Acquisition Date | Mar. 16, 2023 | Mar. 16, 2023 | ||
| Investments, amortized cost | $ 4,537 | $ 4,537 | ||
| Investments, fair value | $ 8,294 | $ 4,784 | 1,657 | |
| Percent of net assets | 3.30% | 1.80% | 3.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | true | false | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.92% | 8.96% | 8.92% | |
| Acquisition Date | Dec. 03, 2024 | Dec. 03, 2024 | ||
| Maturity Date | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | |
| Investments, fair value | $ 5 | $ 4 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | Electrical Components And Equipment [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.92% | 8.96% | 8.92% | |
| Acquisition Date | Dec. 03, 2024 | Dec. 03, 2024 | ||
| Maturity Date | Nov. 04, 2030 | Nov. 04, 2030 | Nov. 04, 2030 | |
| Principal/Share Amount | $ 3,278 | $ 3,353 | ||
| Investments, amortized cost | 3,242 | 3,312 | ||
| Investments, fair value | $ 3,278 | $ 3,343 | ||
| Investment, Identifier [Axis]: Quest Events, LLC Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | Quest Events, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Acquisition Date | Dec. 28, 2018 | Dec. 28, 2018 | ||
| Principal/Share Amount | $ 402 | $ 385 | ||
| Investments, amortized cost | $ 402 | $ 385 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Quest Events, LLC [Member] | Quest Events, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.43% | 11.48% | 11.43% | |
| Acquisition Date | Mar. 21, 2025 | Mar. 21, 2025 | ||
| Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |
| Principal/Share Amount | $ 129 | $ 124 | ||
| Investments, amortized cost | 128 | 122 | ||
| Investments, fair value | $ 130 | $ 113 | ||
| Percent of net assets | 0.10% | 0.10% | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | Quest Events, LLC [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.43% | 11.48% | 11.43% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |
| Principal/Share Amount | $ 300 | $ 288 | ||
| Investments, amortized cost | 300 | 288 | ||
| Investments, fair value | $ 300 | $ 262 | ||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.41% | 10.48% | 10.41% | |
| Acquisition Date | Sep. 13, 2024 | Sep. 13, 2024 | ||
| Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |
| Principal/Share Amount | $ 1,281 | $ 1,270 | ||
| Investments, amortized cost | 1,272 | 1,258 | ||
| Investments, fair value | $ 1,281 | $ 1,187 | ||
| Percent of net assets | 0.50% | 0.50% | 0.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 2.00% | 2.00% | 2.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.43% | 11.48% | 11.43% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | Sep. 30, 2027 | |
| Principal/Share Amount | $ 11,806 | $ 11,668 | ||
| Investments, amortized cost | 11,797 | 11,655 | ||
| Investments, fair value | $ 11,806 | $ 11,041 | ||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.31% | 9.49% | 9.31% | |
| Acquisition Date | Jan. 27, 2021 | Jan. 27, 2021 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Principal/Share Amount | $ 2,901 | $ 2,916 | ||
| Investments, amortized cost | 2,886 | 2,898 | ||
| Investments, fair value | $ 2,784 | $ 2,827 | ||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RCKCAcquisitionsLLCMember | whfcl:RCKCAcquisitionsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.31% | 9.49% | 9.31% | |
| Acquisition Date | Jan. 27, 2021 | Jan. 27, 2021 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Investments, fair value | $ (50) | $ (35) | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.38% | 9.32% | 9.38% | |
| Acquisition Date | Jan. 27, 2021 | Jan. 27, 2021 | ||
| Maturity Date | Jan. 02, 2029 | Jan. 02, 2029 | Jan. 02, 2029 | |
| Principal/Share Amount | $ 10,752 | $ 10,809 | ||
| Investments, amortized cost | 10,700 | 10,747 | ||
| Investments, fair value | $ 10,321 | $ 10,481 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.25% | 6.75% | 7.25% | |
| Interest Rate | 10.99% | 10.72% | 10.99% | |
| Cash interest rate | 10.49% | 10.49% | ||
| PIK interest rate | 0.50% | 0.50% | ||
| Acquisition Date | Jan. 23, 2024 | Jan. 23, 2024 | ||
| Maturity Date | Jan. 03, 2028 | Dec. 31, 2026 | Jan. 03, 2028 | |
| Principal/Share Amount | $ 6,573 | $ 6,592 | ||
| Investments, amortized cost | 6,540 | 6,546 | ||
| Investments, fair value | $ 6,409 | $ 6,396 | ||
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | whfcl:RewardsNetworkInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | |
| 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.65% | 9.76% | 9.65% | |
| Acquisition Date | Dec. 05, 2025 | Dec. 05, 2025 | ||
| Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |
| Investments, fair value | $ 20 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | whfcl:RewardsNetworkInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Prime Rate [Member] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.00% | 6.00% | 5.00% | |
| Interest Rate | 11.75% | 9.82% | 11.75% | |
| Acquisition Date | Dec. 05, 2025 | Dec. 05, 2025 | ||
| Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |
| Principal/Share Amount | $ 160 | $ 638 | ||
| Investments, amortized cost | 157 | 627 | ||
| Investments, fair value | $ 178 | $ 627 | ||
| Percent of net assets | 0.10% | 0.20% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Rewards Network Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:RewardsNetworkInc.Member | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | |
| 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] | |
| Floor | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 9.65% | 9.76% | 9.65% | |
| Acquisition Date | Dec. 05, 2025 | Dec. 05, 2025 | ||
| Maturity Date | Dec. 05, 2031 | Dec. 05, 2031 | Dec. 05, 2031 | |
| Principal/Share Amount | $ 10,187 | $ 10,213 | ||
| Investments, amortized cost | 10,026 | 10,036 | ||
| Investments, fair value | $ 10,109 | $ 10,034 | ||
| Percent of net assets | 4.00% | 3.90% | 4.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.89% | 9.97% | 9.89% | |
| Acquisition Date | Jun. 21, 2024 | Jun. 21, 2024 | ||
| Maturity Date | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | |
| Investments, fair value | $ 8 | $ 12 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.89% | 9.97% | 9.89% | |
| Acquisition Date | Jun. 21, 2024 | Jun. 21, 2024 | ||
| Maturity Date | Jun. 21, 2029 | Jun. 21, 2029 | Jun. 21, 2029 | |
| Principal/Share Amount | $ 8,492 | $ 8,602 | ||
| Investments, amortized cost | 8,392 | 8,483 | ||
| Investments, fair value | $ 8,470 | $ 8,631 | ||
| Percent of net assets | 3.30% | 3.30% | 3.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:Ross-SimonsTopcoLPMember | whfcl:Ross-SimonsTopcoLPMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Other Specialty Retail | Other Specialty Retail | Other Specialty Retail | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| PIK interest rate | 8.00% | 8.00% | 8.00% | |
| Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | ||
| Principal/Share Amount | $ 600 | $ 600 | ||
| Investments, amortized cost | 514 | 514 | ||
| Investments, fair value | $ 625 | $ 735 | ||
| Percent of net assets | 0.20% | 0.30% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | whfcl:ScicBuyerInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.48% | 8.42% | 8.48% | |
| Acquisition Date | Jun. 04, 2025 | Jun. 04, 2025 | ||
| Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |
| Principal/Share Amount | $ 295 | |||
| Investments, amortized cost | 293 | |||
| Investments, fair value | $ 27 | $ 319 | ||
| Investment, Identifier [Axis]: SCIC Buyer, Inc. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ScicBuyerInc.Member | whfcl:ScicBuyerInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.48% | 8.42% | 8.48% | |
| Acquisition Date | Jun. 04, 2025 | Jun. 04, 2025 | ||
| Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |
| Investments, fair value | $ 23 | $ 25 | ||
| Investment, Identifier [Axis]: SCIC Buyer, Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ScicBuyerInc.Member | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.48% | 8.42% | 8.48% | |
| Acquisition Date | Jun. 04, 2025 | Jun. 04, 2025 | ||
| Maturity Date | Mar. 28, 2031 | Mar. 28, 2031 | Mar. 28, 2031 | |
| Principal/Share Amount | $ 9,045 | $ 9,090 | ||
| Investments, amortized cost | 8,936 | 8,970 | ||
| Investments, fair value | $ 9,135 | $ 9,142 | ||
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | whfcl:SalonRepublicHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| Interest Rate | 11.74% | 11.82% | 11.74% | |
| Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | ||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |
| Principal/Share Amount | $ 1,643 | $ 1,652 | ||
| Investments, amortized cost | 1,634 | 1,637 | ||
| Investments, fair value | $ 1,642 | $ 1,653 | ||
| Percent of net assets | 0.60% | 0.60% | 0.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | whfcl:SalonRepublicHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| Interest Rate | 11.74% | 11.82% | 11.74% | |
| Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | ||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |
| Investments, fair value | $ 7 | $ 8 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicHoldingsLlcMember | whfcl:SalonRepublicHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| Interest Rate | 11.74% | 11.82% | 11.74% | |
| Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | ||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |
| Principal/Share Amount | $ 5,009 | $ 5,032 | ||
| Investments, amortized cost | 4,967 | 4,974 | ||
| Investments, fair value | $ 5,008 | $ 5,021 | ||
| Percent of net assets | 2.00% | 1.90% | 2.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Salon Republic Investments LLC Common Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicInvestmentsLlcMember | whfcl:SalonRepublicInvestmentsLlcMember | ||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | ||
| Principal/Share Amount | $ 400 | $ 400 | ||
| Investments, amortized cost | $ 400 | 400 | ||
| Investments, fair value | $ 6 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Salon Republic Investments LLC Preferred Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SalonRepublicInvestmentsLlcMember | whfcl:SalonRepublicInvestmentsLlcMember | ||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Spread Above Index | 8.00% | 8.00% | 8.00% | |
| PIK interest rate | 8.00% | 8.00% | 8.00% | |
| Acquisition Date | Dec. 02, 2022 | Dec. 02, 2022 | ||
| Principal/Share Amount | $ 200 | $ 200 | ||
| Investments, amortized cost | 200 | 200 | ||
| Investments, fair value | $ 235 | $ 265 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | true | false | |
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SleepOpCoLLCMember | whfcl:SleepOpCoLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.15% | 9.37% | 9.15% | |
| Acquisition Date | Nov. 07, 2025 | Nov. 07, 2025 | ||
| Maturity Date | Nov. 07, 2030 | Nov. 07, 2030 | Nov. 07, 2030 | |
| Investments, fair value | $ 20 | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.15% | 9.37% | 9.15% | |
| Acquisition Date | Nov. 07, 2025 | Nov. 07, 2025 | ||
| Maturity Date | Nov. 07, 2030 | Nov. 07, 2030 | Nov. 07, 2030 | |
| Principal/Share Amount | $ 13,388 | $ 13,455 | ||
| Investments, amortized cost | 13,213 | 13,259 | ||
| Investments, fair value | $ 13,393 | $ 13,255 | ||
| Percent of net assets | 5.30% | 5.10% | 5.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 9.63% | 9.57% | 9.63% | |
| Acquisition Date | May 04, 2022 | May 04, 2022 | ||
| Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |
| Principal/Share Amount | $ 944 | $ 944 | ||
| Investments, amortized cost | 938 | 936 | ||
| Investments, fair value | $ 944 | $ 944 | ||
| Investment, Identifier [Axis]: Smalto Inc. First Lien Secured Term Loan | ||||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Euro Interbank Offered Rate Three Month Term [Member] | Euro Interbank Offered Rate One Month Term [Member] | Euro Interbank Offered Rate Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.00% | 6.00% | |
| Interest Rate | 8.29% | 7.90% | 8.29% | |
| Acquisition Date | May 04, 2022 | May 04, 2022 | ||
| Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |
| Principal/Share Amount | $ 6,198 | € 6,198 | ||
| Investments, amortized cost | $ 6,489 | 6,480 | ||
| Investments, fair value | $ 7,080 | $ 7,281 | ||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | ||
| Investment, Type [Extensible Enumeration] | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | ||
| Principal/Share Amount | $ 2 | $ 2 | ||
| Investments, amortized cost | 1,941 | 1,941 | ||
| Investments, fair value | $ 434 | $ 507 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | whfcl:FirstLienSecuredTermLoanCMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Spread Above Index | 9.50% | 9.50% | 9.50% | |
| PIK interest rate | 9.50% | |||
| PIK interest rate | 9.50% | 9.50% | ||
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | ||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 2,199 | $ 2,098 | ||
| Investments, amortized cost | 2,196 | 2,095 | ||
| Investments, fair value | $ 2,199 | $ 2,098 | ||
| Percent of net assets | 0.90% | 0.80% | 0.90% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SnapFitnessHoldingsIncMember | whfcl:SnapFitnessHoldingsIncMember | ||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | ||
| Principal/Share Amount | $ 1 | $ 1 | ||
| Investments, amortized cost | 793 | 793 | ||
| Investments, fair value | $ 176 | $ 205 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 | whfcl:SourceCodeHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Aug. 10, 2021 | Aug. 10, 2021 | ||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |
| Principal/Share Amount | $ 3,785 | $ 3,831 | ||
| Investments, amortized cost | 3,771 | 3,811 | ||
| Investments, fair value | $ 3,748 | $ 3,831 | ||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SourceCodeHoldingsLLCMember | whfcl:SourceCodeHoldingsLLCMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.32% | 10.24% | |
| Acquisition Date | Aug. 10, 2021 | Aug. 10, 2021 | ||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |
| Principal/Share Amount | $ 13,837 | $ 14,009 | ||
| Investments, amortized cost | 13,788 | 13,935 | ||
| Investments, fair value | $ 13,703 | $ 14,009 | ||
| Investment, Identifier [Axis]: Sterling Pure Blocker, LLC (d/b/a Banner Industries, Inc.) Class B Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:SterlingPureBlockerLlcMember | whfcl:SterlingPureBlockerLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | |
| Acquisition Date | Dec. 01, 2023 | Dec. 01, 2023 | ||
| Principal/Share Amount | $ 404 | $ 404 | ||
| Investments, amortized cost | 404 | 404 | ||
| Investments, fair value | $ 247 | $ 57 | ||
| Percent of net assets | 0.10% | 0.10% | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.89% | 9.99% | 9.89% | |
| Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | ||
| Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Principal/Share Amount | $ 2,835 | $ 1,002 | ||
| Investments, amortized cost | 2,792 | 987 | ||
| Investments, fair value | $ 2,850 | $ 1,000 | ||
| Percent of net assets | 1.10% | 0.40% | 1.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Base Rate [Member] | Base Rate [Member] | Base Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.03% | 5.90% | 6.03% | |
| Interest Rate | 10.34% | 10.82% | 10.34% | |
| Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | ||
| Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Principal/Share Amount | $ 732 | $ 451 | ||
| Investments, amortized cost | 722 | 444 | ||
| Investments, fair value | $ 732 | $ 450 | ||
| Percent of net assets | 0.30% | 0.20% | 0.30% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Surge Amuze Holdings Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.90% | 9.99% | 9.90% | |
| Acquisition Date | Sep. 06, 2024 | Sep. 06, 2024 | ||
| Maturity Date | Sep. 06, 2029 | Sep. 06, 2029 | Sep. 06, 2029 | |
| Principal/Share Amount | $ 5,651 | $ 5,679 | ||
| Investments, amortized cost | 5,579 | 5,596 | ||
| Investments, fair value | $ 5,649 | $ 5,645 | ||
| Percent of net assets | 2.20% | 2.20% | 2.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Tot Group, Inc. [Member] | Tot Group, Inc. [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | |
| Interest Rate | 11.23% | 10.92% | 11.23% | |
| Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | ||
| Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Principal/Share Amount | $ 1,099 | $ 1,103 | ||
| Investments, amortized cost | 1,083 | 1,084 | ||
| Investments, fair value | $ 1,103 | $ 1,091 | ||
| Percent of net assets | 0.40% | 0.40% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Netevia Group LLC) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Tot Group, Inc. [Member] | Tot Group, Inc. [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | |
| Interest Rate | 11.23% | 10.92% | 11.23% | |
| Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | ||
| Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Investments, fair value | $ 7 | $ 1 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Netevia Group LLC) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Transaction & Payment Processing Services | Transaction & Payment Processing Services | Transaction & Payment Processing 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | |
| Interest Rate | 11.23% | 10.92% | 11.23% | |
| Acquisition Date | Jun. 28, 2024 | Jun. 28, 2024 | ||
| Maturity Date | Jun. 28, 2029 | Jun. 28, 2029 | Jun. 28, 2029 | |
| Principal/Share Amount | $ 9,111 | $ 9,146 | ||
| Investments, amortized cost | 8,987 | 9,000 | ||
| Investments, fair value | $ 9,109 | $ 9,023 | ||
| Percent of net assets | 3.60% | 3.40% | 3.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: TVG I-EMSI Parent, LLC Class A units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TvgIEmsiParentLlcMember | whfcl:TvgIEmsiParentLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | whfcl:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | |
| Acquisition Date | Sep. 01, 2025 | Sep. 01, 2025 | ||
| Principal/Share Amount | $ 20,765 | $ 20,765 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: TVG I-EMSI Parent, LLC Class B units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TvgIEmsiParentLlcMember | whfcl:TvgIEmsiParentLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | whfcl:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | |
| Acquisition Date | Sep. 01, 2025 | Sep. 01, 2025 | ||
| Principal/Share Amount | $ 2 | $ 2 | ||
| Investments, amortized cost | 3,291 | 3,291 | ||
| Investments, fair value | $ 2,531 | $ 3,291 | ||
| Percent of net assets | 1.00% | 1.30% | 1.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 5.75% | 6.00% | |
| Interest Rate | 8.66% | 9.57% | 8.66% | |
| Acquisition Date | Dec. 24, 2024 | Dec. 24, 2024 | ||
| Maturity Date | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | |
| Principal/Share Amount | $ 2,731 | $ 2,480 | ||
| Investments, amortized cost | 2,708 | 2,453 | ||
| Investments, fair value | $ 2,716 | $ 2,480 | ||
| Investment, Identifier [Axis]: Telestream 2 LLC (d/b/a Telestream Holdings Corporation), First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Telestream 2 LLC Telestream Holdings Corporation [Member] | Telestream 2 LLC Telestream Holdings Corporation [Member] | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.92% | 10.19% | 9.92% | |
| Acquisition Date | Jun. 07, 2025 | Jun. 07, 2025 | ||
| Maturity Date | Jun. 07, 2028 | Jun. 07, 2028 | Jun. 07, 2028 | |
| Investments, fair value | $ 16 | $ 20 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Telestream 2 LLC (d/b/a Telestream Holdings Corporation), First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Telestream 2 LLC Telestream Holdings Corporation [Member] | Telestream 2 LLC 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.92% | 10.19% | 9.92% | |
| Acquisition Date | Jun. 07, 2025 | Jun. 07, 2025 | ||
| Maturity Date | Jun. 07, 2028 | Jun. 07, 2028 | Jun. 07, 2028 | |
| Principal/Share Amount | $ 11,379 | $ 11,437 | ||
| Investments, amortized cost | 11,379 | 11,437 | ||
| Investments, fair value | $ 11,379 | $ 11,437 | ||
| Percent of net assets | 4.50% | 4.40% | 4.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Telestream Topco 2 LLC (d/b/a Telestream Holdings Corporation), Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Telestream 2 LLC Telestream Holdings Corporation [Member] | whfcl:TelestreamTopco2LlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Acquisition Date | Jun. 07, 2025 | Jun. 07, 2025 | ||
| Principal/Share Amount | $ 497 | $ 497 | ||
| Investments, amortized cost | 7,109 | 7,109 | ||
| Investments, fair value | $ 8,095 | $ 8,027 | ||
| Percent of net assets | 3.20% | 3.10% | 3.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | whfcl:TexasExpressWashLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.23% | 10.24% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |
| Principal/Share Amount | $ 472 | |||
| Investments, amortized cost | 458 | |||
| Investments, fair value | $ 516 | |||
| Percent of net assets | 0.20% | 0.20% | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | whfcl:TexasExpressWashLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.23% | 10.24% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |
| Principal/Share Amount | $ 104 | $ 104 | ||
| Investments, amortized cost | 101 | 100 | ||
| Investments, fair value | $ 110 | $ 100 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Texas Express Wash, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | whfcl:TexasExpressWashLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.24% | 10.23% | 10.24% | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 26, 2030 | Nov. 26, 2030 | Nov. 26, 2030 | |
| Principal/Share Amount | $ 11,073 | $ 11,128 | ||
| Investments, amortized cost | 10,759 | 10,778 | ||
| Investments, fair value | $ 11,015 | $ 10,776 | ||
| Percent of net assets | 4.40% | 4.10% | 4.40% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Texas Express Wash, LLC Second Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasExpressWashLlcMember | whfcl:TexasExpressWashLlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | whfcl:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Spread Above Index | 14.00% | 14.00% | 14.00% | |
| Interest Rate | 14.00% | 14.00% | 14.00% | |
| Cash interest rate | 7.00% | 7.00% | 7.00% | |
| PIK interest rate | 7.00% | |||
| PIK interest rate | 7.00% | 7.00% | ||
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Maturity Date | Nov. 26, 2031 | Nov. 26, 2031 | Nov. 26, 2031 | |
| Principal/Share Amount | $ 1,625 | $ 1,569 | ||
| Investments, amortized cost | 1,502 | 1,436 | ||
| Investments, fair value | $ 1,573 | $ 1,435 | ||
| Percent of net assets | 0.60% | 0.60% | 0.60% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Texas Wash Holdings, LLC (d/b/a ClearWater Express Wash), Warrants | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TexasWashHoldingsLlcMember | whfcl:TexasWashHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Acquisition Date | Nov. 26, 2025 | Nov. 26, 2025 | ||
| Investments, amortized cost | $ 197 | $ 197 | ||
| Investments, fair value | $ 204 | $ 197 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CromCorporationMember | whfcl:CromCorporationMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities [Member] | Water Utilities [Member] | Water Utilities [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.00% | 4.75% | |
| Interest Rate | 8.42% | 8.90% | 8.42% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Principal/Share Amount | $ 798 | $ 802 | ||
| Investments, amortized cost | 790 | 793 | ||
| Investments, fair value | $ 811 | $ 806 | ||
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CromCorporationMember | whfcl:CromCorporationMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities [Member] | Water Utilities [Member] | Water Utilities [Member] | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.00% | 4.75% | |
| Interest Rate | 8.41% | 8.84% | 8.41% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Principal/Share Amount | $ 168 | $ 312 | ||
| Investments, amortized cost | 166 | 308 | ||
| Investments, fair value | $ 174 | $ 317 | ||
| Investment, Identifier [Axis]: The Crom Corporation First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:CromCorporationMember | whfcl:CromCorporationMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Water Utilities [Member] | Water Utilities [Member] | Water Utilities [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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.00% | 4.75% | |
| Interest Rate | 8.41% | 8.84% | 8.41% | |
| Acquisition Date | Mar. 05, 2025 | Mar. 05, 2025 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Principal/Share Amount | $ 4,029 | $ 4,049 | ||
| Investments, amortized cost | 3,983 | 3,998 | ||
| Investments, fair value | $ 4,058 | $ 4,049 | ||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TheKyjenCompanyLLCMember | whfcl:TheKyjenCompanyLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Prime Rate [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Prime Rate [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.50% | 7.50% | 6.50% | |
| Interest Rate | 13.25% | 11.61% | 13.25% | |
| Cash interest rate | 10.75% | 10.61% | 10.75% | |
| PIK interest rate | 2.50% | 1.00% | 2.50% | |
| Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | ||
| Maturity Date | Oct. 06, 2026 | Apr. 05, 2026 | Oct. 06, 2026 | |
| Principal/Share Amount | $ 375 | |||
| Investments, amortized cost | 383 | |||
| Investments, fair value | $ 78 | $ (132) | ||
| Percent of net assets | (0.10%) | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.23% | 11.61% | 11.23% | |
| Cash interest rate | 10.23% | 10.61% | 10.23% | |
| PIK interest rate | 1.00% | 1.00% | 1.00% | |
| Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | ||
| Maturity Date | Oct. 06, 2026 | Apr. 05, 2026 | Oct. 06, 2026 | |
| Principal/Share Amount | $ 11,439 | $ 11,409 | ||
| Investments, amortized cost | 11,307 | 11,400 | ||
| Investments, fair value | $ 7,701 | $ 9,790 | ||
| Percent of net assets | 3.00% | 3.80% | 3.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | |||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TokenBuyerIncMember | |||
| Investment, Type [Extensible Enumeration] | First Lien Secured Term Loan [Member] | |||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | |||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | |||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |||
| Floor | 0.50% | |||
| Spread Above Index | 6.00% | |||
| Interest Rate | 9.99% | |||
| Acquisition Date | May 26, 2022 | |||
| Maturity Date | May 31, 2029 | |||
| Principal/Share Amount | $ 1,587 | |||
| Investments, amortized cost | 1,363 | |||
| Investments, fair value | $ 1,199 | |||
| Percent of net assets | 0.50% | |||
| Investment, Restriction Status [true false] | true | |||
| Investment, Significant Unobservable Input [true false] | true | |||
| Investment, Non-income Producing [true false] | false | |||
| Investment, Identifier [Axis]: Trailhead Media LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrailheadMediaLLCMember | whfcl:TrailheadMediaLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.23% | 9.17% | 9.23% | |
| Cash interest rate | 8.48% | 8.42% | 8.48% | |
| PIK interest rate | 0.75% | 0.75% | 0.75% | |
| Acquisition Date | Jan. 22, 2025 | Jan. 22, 2025 | ||
| Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Investments, fair value | $ (5) | $ (3) | ||
| Investment, Identifier [Axis]: Trailhead Media LLC, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrailheadMediaLLCMember | whfcl:TrailheadMediaLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.23% | 9.17% | 9.23% | |
| Cash interest rate | 8.48% | 8.42% | 8.48% | |
| PIK interest rate | 0.75% | 0.75% | 0.75% | |
| Acquisition Date | Jan. 22, 2025 | Jan. 22, 2025 | ||
| Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Investments, fair value | $ (4) | $ (3) | ||
| Investment, Identifier [Axis]: Trailhead Media LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrailheadMediaLLCMember | whfcl:TrailheadMediaLLCMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 9.23% | 9.17% | 9.23% | |
| Cash interest rate | 8.48% | 8.42% | 8.48% | |
| PIK interest rate | 0.75% | 0.75% | 0.75% | |
| Acquisition Date | Jan. 22, 2025 | Jan. 22, 2025 | ||
| Maturity Date | Dec. 28, 2029 | Dec. 28, 2029 | Dec. 28, 2029 | |
| Principal/Share Amount | $ 6,624 | $ 6,632 | ||
| Investments, amortized cost | 6,555 | 6,553 | ||
| Investments, fair value | $ 6,524 | $ 6,532 | ||
| Investment, Identifier [Axis]: Transervice Holdings, Inc. (d/b/a Transervice Logistics, Inc.), First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Cargo Ground Transportation | Cargo Ground Transportation | Cargo Ground Transportation | |
| 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] | |
| Floor | 2.00% | 2.00% | 2.00% | |
| Spread Above Index | 7.50% | 7.25% | 7.50% | |
| Interest Rate | 11.24% | 11.07% | 11.24% | |
| Acquisition Date | Jun. 29, 2023 | Jun. 29, 2023 | ||
| Maturity Date | Jun. 29, 2028 | Jun. 29, 2028 | Jun. 29, 2028 | |
| Principal/Share Amount | $ 7,589 | $ 7,701 | ||
| Investments, amortized cost | 7,498 | 7,586 | ||
| Investments, fair value | $ 7,583 | $ 7,701 | ||
| Percent of net assets | 3.00% | 3.00% | 3.00% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Trimlite Buyer LLC (d/b/a Trimlite LLC) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 5.50% | 4.75% | |
| Interest Rate | 7.04% | 8.08% | 7.04% | |
| Acquisition Date | Mar. 11, 2026 | Jul. 27, 2021 | ||
| Maturity Date | Mar. 11, 2031 | Jul. 27, 2027 | Mar. 11, 2031 | |
| Principal/Share Amount | $ 1,896 | $ 18,868 | ||
| Investments, amortized cost | 1,382 | 14,957 | ||
| Investments, fair value | $ 1,329 | $ 13,748 | ||
| Percent of net assets | 0.50% | 5.30% | 0.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Trimlite Buyer LLC, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrimliteBuyerLLCMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | ||
| 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 4.75% | 4.75% | ||
| Interest Rate | 8.48% | 8.48% | ||
| Acquisition Date | May 20, 2026 | |||
| Maturity Date | Mar. 11, 2031 | Mar. 11, 2031 | ||
| Investments, fair value | $ 4 | |||
| Investment, Identifier [Axis]: Trimlite Buyer LLC, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TrimliteBuyerLLCMember | |||
| 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) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 4.75% | 4.75% | ||
| Interest Rate | 8.48% | 8.48% | ||
| Acquisition Date | May 20, 2026 | |||
| Maturity Date | Mar. 11, 2031 | Mar. 11, 2031 | ||
| Principal/Share Amount | $ 2,744 | |||
| Investments, amortized cost | 2,718 | |||
| Investments, fair value | $ 2,729 | |||
| 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 | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.98% | 8.92% | 8.98% | |
| Acquisition Date | Jun. 14, 2024 | Jun. 14, 2024 | ||
| Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | |
| Investments, fair value | $ 16 | $ 18 | ||
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.25% | 5.25% | 5.25% | |
| Interest Rate | 8.98% | 8.92% | 8.98% | |
| Acquisition Date | Jun. 14, 2024 | Jun. 14, 2024 | ||
| Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | |
| Principal/Share Amount | $ 8,052 | $ 8,093 | ||
| Investments, amortized cost | 7,951 | 7,975 | ||
| Investments, fair value | $ 8,080 | $ 8,107 | ||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc.First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | whfcl:TurnberrySolutionsInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 5.75% | 6.00% | |
| Interest Rate | 9.81% | 9.57% | 9.81% | |
| Acquisition Date | Aug. 10, 2021 | Aug. 10, 2021 | ||
| Maturity Date | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | |
| Investments, fair value | $ 2 | $ 2 | ||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc.First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TurnberrySolutionsInc.Member | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 5.75% | 6.00% | |
| Interest Rate | 9.81% | 9.57% | 9.81% | |
| Acquisition Date | Aug. 10, 2021 | Aug. 10, 2021 | ||
| Maturity Date | Mar. 02, 2028 | Mar. 02, 2028 | Mar. 02, 2028 | |
| Principal/Share Amount | $ 5,872 | $ 5,902 | ||
| Investments, amortized cost | 5,857 | 5,885 | ||
| Investments, fair value | $ 5,872 | $ 5,902 | ||
| Investment, Identifier [Axis]: Twin Ridge CRS, LP (d/b/a CRS OneSource) Class A Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:TwinRidgeCrsLpMember | whfcl:TwinRidgeCrsLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | whfcl:ClassCommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Food Distributors | Food Distributors | Food Distributors | |
| Acquisition Date | May 10, 2024 | May 10, 2024 | ||
| Principal/Share Amount | $ 63 | $ 63 | ||
| Investments, amortized cost | 317 | 317 | ||
| Investments, fair value | $ 343 | $ 264 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: UserZoom Technologies, Inc. First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Application Software | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 7.75% | 7.50% | 7.75% | |
| Interest Rate | 11.40% | 11.63% | 11.40% | |
| Cash interest rate | 9.65% | 9.65% | ||
| PIK interest rate | 1.75% | 1.75% | ||
| Acquisition Date | Jan. 12, 2023 | Jan. 12, 2023 | ||
| Maturity Date | Apr. 05, 2029 | Apr. 05, 2029 | Apr. 05, 2029 | |
| Principal/Share Amount | $ 10,686 | $ 9,819 | ||
| Investments, amortized cost | 10,542 | 9,665 | ||
| Investments, fair value | $ 10,415 | $ 9,621 | ||
| Percent of net assets | 4.10% | 3.70% | 4.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Vibration Mountings amp; Controls, Inc, Common Stock | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | Vibration Mountings & Controls, Inc. [Member] | |||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | ||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | ||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | ||
| Acquisition Date | Jun. 23, 2026 | |||
| Investments, amortized cost | $ 95 | |||
| Investments, fair value | $ 95 | |||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Vibration Mountings amp; Controls, Inc, First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | Vibration Mountings & Controls, 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] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | ||
| 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.00% | 5.00% | ||
| Interest Rate | 8.70% | 8.70% | ||
| Acquisition Date | Jun. 23, 2026 | |||
| Maturity Date | Jun. 23, 2031 | Jun. 23, 2031 | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Vibration Mountings amp; Controls, Inc, First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | Vibration Mountings & Controls, Inc. [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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.00% | 5.00% | ||
| Interest Rate | 8.70% | 8.70% | ||
| Acquisition Date | Jun. 23, 2026 | |||
| Maturity Date | Jun. 23, 2031 | Jun. 23, 2031 | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Vibration Mountings amp; Controls, Inc, First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | Vibration Mountings & Controls, 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] | Industrial Machinery & Supplies & Components | Industrial Machinery & Supplies & Components | ||
| 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.00% | 5.00% | ||
| Interest Rate | 8.70% | 8.70% | ||
| Acquisition Date | Jun. 23, 2026 | |||
| Maturity Date | Jun. 23, 2031 | Jun. 23, 2031 | ||
| Principal/Share Amount | $ 6,378 | |||
| Investments, amortized cost | 6,282 | |||
| Investments, fair value | $ 6,282 | |||
| Percent of net assets | 2.50% | 2.50% | ||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Preferred Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:VistriaBlockedMgtInvestorLpMember | whfcl:VistriaBlockedMgtInvestorLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | whfcl:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Acquisition Date | Apr. 10, 2023 | Apr. 10, 2023 | ||
| Investments, fair value | $ 15 | $ 15 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Series A Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:VistriaBlockedMgtInvestorLpMember | whfcl:VistriaBlockedMgtInvestorLpMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | whfcl:SeriesUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Acquisition Date | Apr. 10, 2023 | Apr. 10, 2023 | ||
| Investments, fair value | $ 47 | $ 308 | ||
| Percent of net assets | 0.10% | |||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WElectricIntermediateHoldingsLlcMember | whfcl:WElectricIntermediateHoldingsLlcMember | ||
| Investment, Type [Extensible Enumeration] | 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 | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.00% | 6.50% | 6.00% | |
| Interest Rate | 9.64% | 10.22% | 9.64% | |
| Cash interest rate | 9.14% | 9.22% | 9.14% | |
| PIK interest rate | 0.50% | 1.00% | 0.50% | |
| Acquisition Date | Aug. 15, 2024 | Aug. 15, 2024 | ||
| Maturity Date | Aug. 15, 2029 | Aug. 15, 2029 | Aug. 15, 2029 | |
| Principal/Share Amount | $ 12,303 | $ 12,308 | ||
| Investments, amortized cost | 12,170 | 12,154 | ||
| Investments, fair value | $ 12,303 | $ 12,334 | ||
| Percent of net assets | 4.90% | 4.70% | 4.90% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: WCHG Buyer, Inc.,First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WchgBuyerInc.Member | whfcl:WchgBuyerInc.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | First Lien Secured Term Loan [Member] | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | 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 | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.66% | 8.47% | 8.66% | |
| Acquisition Date | Apr. 01, 2025 | Apr. 01, 2025 | ||
| Maturity Date | Apr. 10, 2031 | Apr. 10, 2031 | Apr. 10, 2031 | |
| Principal/Share Amount | $ 12,226 | $ 6,948 | ||
| Investments, amortized cost | 12,156 | 6,918 | ||
| Investments, fair value | $ 12,130 | $ 6,948 | ||
| 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 | |
| Investments, fair value | $ 22,361 | $ 21,602 | 22,741 | |
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | whfcl:WHFSTRSOhioSeniorLoanFundMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | whfcl:LLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Principal/Share Amount | $ 21,564 | $ 21,104 | ||
| Investments, amortized cost | 21,564 | 21,104 | ||
| Investments, fair value | $ 22,361 | $ 21,602 | ||
| Percent of net assets | 8.80% | 8.30% | 8.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | whfcl:WHFSTRSOhioSeniorLoanFundLLCMember | ||
| Investment, Type [Extensible Enumeration] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | |
| 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] | |
| Floor | 0.00% | 0.00% | ||
| Spread Above Index | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.12% | 10.18% | 10.12% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | ||
| Principal/Share Amount | $ 86,256 | $ 84,416 | ||
| Investments, amortized cost | 86,256 | 84,416 | ||
| Investments, fair value | $ 86,256 | $ 84,416 | $ 84,416 | |
| Percent of net assets | 34.10% | 32.50% | 34.10% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Delayed Draw Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | whfcl:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.98% | 9.92% | 9.98% | |
| Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Investments, fair value | $ (1) | $ 1 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | whfcl:WakefieldAndAssociatesIntermediateCo.LlcMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.98% | 9.92% | 9.98% | |
| Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Principal/Share Amount | $ 448 | $ 345 | ||
| Investments, amortized cost | 443 | 340 | ||
| Investments, fair value | $ 447 | $ 346 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Wamp;A Intermediate Co., LLC First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | 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] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 9.98% | 9.92% | 9.98% | |
| Acquisition Date | Aug. 01, 2024 | Aug. 01, 2024 | ||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |
| Principal/Share Amount | $ 7,078 | $ 7,148 | ||
| Investments, amortized cost | 6,991 | 7,045 | ||
| Investments, fair value | $ 7,027 | $ 7,100 | ||
| Percent of net assets | 2.80% | 2.70% | 2.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: What If Media Group, LLC Common Units | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WhatIfMediaGroupLLCMember | whfcl:WhatIfMediaGroupLLCMember | ||
| Investment, Type [Extensible Enumeration] | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | whfcl:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |
| Acquisition Date | Jul. 02, 2021 | Jul. 02, 2021 | ||
| Principal/Share Amount | $ 851 | $ 3,081 | ||
| Investments, amortized cost | 851 | 851 | ||
| Investments, fair value | $ 1,961 | $ 1,963 | ||
| Percent of net assets | 0.80% | 0.80% | 0.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.) First Lien Secured Revolving Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled affiliate company investments | ||
| Investment, Issuer Name [Extensible Enumeration] | whfcl:WhitestoneHomeFurnishingsLlcMember | |||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | ||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | ||
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | ||
| 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] | ||
| Floor | 1.00% | 1.00% | ||
| Spread Above Index | 5.50% | 5.50% | ||
| Interest Rate | 9.14% | 9.14% | ||
| Acquisition Date | Jan. 12, 2026 | |||
| Maturity Date | Sep. 30, 2027 | Sep. 30, 2027 | ||
| Investments, fair value | $ 5 | |||
| Investment, Restriction Status [true false] | true | true | ||
| Investment, Significant Unobservable Input [true false] | true | true | ||
| Investment, Non-income Producing [true false] | false | false | ||
| Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.) First Lien Secured Term Loan | ||||
| Schedule of Investments [Line Items] | ||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | |
| 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] | |
| Floor | 1.00% | 1.00% | 1.00% | |
| Spread Above Index | 5.50% | 5.25% | 5.50% | |
| Interest Rate | 9.14% | 8.97% | 9.14% | |
| Acquisition Date | Nov. 06, 2023 | Nov. 06, 2023 | ||
| Maturity Date | Sep. 30, 2027 | Aug. 20, 2026 | Sep. 30, 2027 | |
| Principal/Share Amount | $ 4,669 | $ 2,848 | ||
| Investments, amortized cost | 4,638 | 2,832 | ||
| Investments, fair value | $ 4,671 | $ 2,848 | ||
| Percent of net assets | 1.80% | 1.10% | 1.80% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ZephyrBuyerL.p.Member | whfcl:ZephyrBuyerL.p.Member | ||
| Investment, Type [Extensible Enumeration] | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | whfcl:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.39% | 8.42% | 8.39% | |
| Acquisition Date | Jan. 31, 2024 | Jan. 31, 2024 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Investments, fair value | $ 29 | $ 32 | ||
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| 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 Affiliation [Extensible Enumeration] | Non-controlled affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whfcl:ZephyrBuyerL.p.Member | 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] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | Secured Overnight Financing Rate (SOFR) One Month Term [Member] | |
| Floor | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 4.75% | 4.75% | 4.75% | |
| Interest Rate | 8.39% | 8.42% | 8.39% | |
| Acquisition Date | Jan. 31, 2024 | Jan. 31, 2024 | ||
| Maturity Date | Jan. 31, 2031 | Jan. 31, 2031 | Jan. 31, 2031 | |
| Principal/Share Amount | $ 13,828 | $ 13,945 | ||
| Investments, amortized cost | 13,609 | 13,701 | ||
| Investments, fair value | $ 13,828 | $ 13,945 | ||
| Percent of net assets | 5.50% | 5.40% | 5.50% | |
| Investment, Restriction Status [true false] | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | |
| Morgan Stanley | ||||
| Schedule of Investments [Line Items] | ||||
| Unrealized appreciation | $ 67 | |||
| Unrealized depreciation | $ (325) | |||
| Morgan Stanley | CAD | ||||
| Schedule of Investments [Line Items] | ||||
| Currency to be sold | 2,013 | 20,333 | ||
| Unrealized appreciation | $ 67 | |||
| Morgan Stanley | USD | ||||
| Schedule of Investments [Line Items] | ||||
| Currency to be purchased | 1,488 | 14,515 | ||
| Morgan Stanley One [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Unrealized appreciation | $ 2 | |||
| Morgan Stanley One [Member] | EUR | ||||
| Schedule of Investments [Line Items] | ||||
| Currency to be sold | 4,989 | |||
| Morgan Stanley One [Member] | USD | ||||
| Schedule of Investments [Line Items] | ||||
| Currency to be purchased | 5,874 | |||
| Canadian Dollar Offered Rate Three Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.30% | |||
| Prime Rate [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 6.80% | 6.80% | ||
| Secured Overnight Financing Rate (SOFR) Three Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 3.70% | 3.70% | ||
| Secured Overnight Financing Rate (SOFR) One Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 3.70% | 3.70% | ||
| Secured Overnight Financing Rate (SOFR) Six Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 3.80% | 3.60% | ||
| Canadian Overnight Repo Rate Average | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.30% | |||
| Canadian Overnight Repo Rate Average Three Months Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.30% | 2.30% | ||
| Euro Interbank Offered Rate Three Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.30% | 2.00% | ||
| Euro Interbank Offered Rate Six Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.60% | 2.10% | ||
| Euro Interbank Offered Rate One Month Term [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Rate of interest on investment per duration period | 2.20% | 1.90% | ||
| Debt Investments | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 518,411 | $ 532,286 | ||
| Investments, fair value | $ 506,279 | $ 520,114 | ||
| Percent of net assets | 200.30% | 200.20% | 200.30% | |
| Debt Investments | Advertising | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 14,249 | $ 14,081 | ||
| Investments, fair value | $ 14,297 | $ 13,653 | ||
| Percent of net assets | 5.70% | 5.30% | 5.70% | |
| Debt Investments | Air Freight & Logistics | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 9,540 | $ 9,416 | ||
| Investments, fair value | $ 9,388 | $ 9,281 | ||
| Percent of net assets | 3.70% | 3.50% | 3.70% | |
| Debt Investments | Application Software | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 29,402 | $ 22,062 | ||
| Investments, fair value | $ 28,222 | $ 20,888 | ||
| Percent of net assets | 11.20% | 8.00% | 11.20% | |
| Debt Investments | Building Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,382 | $ 14,957 | ||
| Investments, fair value | $ 1,329 | $ 13,748 | ||
| Percent of net assets | 0.50% | 5.30% | 0.50% | |
| Debt Investments | Cargo Ground Transportation | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 7,498 | $ 7,586 | ||
| Investments, fair value | $ 7,583 | $ 7,701 | ||
| Percent of net assets | 3.00% | 3.00% | 3.00% | |
| Debt Investments | Human Resource & Employment Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 2,890 | $ 2,899 | ||
| Investments, fair value | $ 2,891 | $ 2,909 | ||
| Percent of net assets | 1.10% | 1.10% | 1.10% | |
| Debt Investments | Construction & Engineering | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 5,057 | $ 9,736 | ||
| Investments, fair value | $ 5,140 | $ 9,849 | ||
| Percent of net assets | 2.00% | 3.80% | 2.00% | |
| Debt Investments | Diversified Chemicals | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 3,404 | $ 3,404 | ||
| Investments, fair value | $ 3,404 | $ 3,404 | ||
| Percent of net assets | 1.30% | 1.30% | 1.30% | |
| Debt Investments | Diversified Support Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 15,392 | $ 15,110 | ||
| Investments, fair value | $ 15,469 | $ 15,072 | ||
| Percent of net assets | 6.20% | 5.70% | 6.20% | |
| Debt Investments | Education Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 22,775 | $ 12,302 | ||
| Investments, fair value | $ 22,708 | $ 12,296 | ||
| Percent of net assets | 9.00% | 4.70% | 9.00% | |
| Debt Investments | Environmental & Facilities Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 2,831 | $ 1,568 | ||
| Investments, fair value | $ 2,867 | $ 1,610 | ||
| Percent of net assets | 1.20% | 0.70% | 1.20% | |
| Debt Investments | Food Distributors | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 215 | |||
| Investments, fair value | $ 218 | |||
| Percent of net assets | 0.10% | 0.10% | ||
| Debt Investments | Health Care Facilities | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 4,768 | $ 4,534 | ||
| Investments, fair value | $ 4,897 | $ 4,623 | ||
| Percent of net assets | 1.90% | 1.80% | 1.90% | |
| Debt Investments | Health Care Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 8,361 | $ 8,315 | ||
| Investments, fair value | $ 8,406 | $ 8,389 | ||
| Percent of net assets | 3.40% | 3.20% | 3.40% | |
| Debt Investments | Health Care Supplies | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 20,269 | $ 20,227 | ||
| Investments, fair value | $ 20,409 | $ 20,026 | ||
| Percent of net assets | 8.10% | 7.70% | 8.10% | |
| Debt Investments | Home Furnishings | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 17,851 | $ 16,091 | ||
| Investments, fair value | $ 18,089 | $ 16,103 | ||
| Percent of net assets | 7.10% | 6.20% | 7.10% | |
| Debt Investments | Household Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 11,690 | $ 11,400 | ||
| Investments, fair value | $ 7,785 | $ 9,658 | ||
| Percent of net assets | 3.00% | 3.70% | 3.00% | |
| Debt Investments | Household Appliances | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,363 | |||
| Investments, fair value | $ 1,199 | |||
| Percent of net assets | 0.50% | |||
| Debt Investments | Industrial Machinery & Supplies & Components | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 18,452 | $ 12,154 | ||
| Investments, fair value | $ 18,585 | $ 12,334 | ||
| Percent of net assets | 7.40% | 4.70% | 7.40% | |
| Debt Investments | Integrated Telecommunication Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 14,964 | $ 27,853 | ||
| Investments, fair value | $ 15,157 | $ 26,732 | ||
| Percent of net assets | 6.00% | 10.30% | 6.00% | |
| Debt Investments | Interactive Media & Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 13,609 | $ 13,701 | ||
| Investments, fair value | $ 13,857 | $ 13,977 | ||
| Percent of net assets | 5.50% | 5.40% | 5.50% | |
| Debt Investments | IT Consulting And Other Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 486 | $ 281 | ||
| Investments, fair value | $ 479 | $ 300 | ||
| Percent of net assets | 0.20% | 0.10% | 0.20% | |
| Debt Investments | Leisure Facilities | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 20,423 | $ 20,332 | ||
| Investments, fair value | $ 11,791 | $ 14,521 | ||
| Percent of net assets | 4.70% | 5.70% | 4.70% | |
| Debt Investments | Leisure Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 18,706 | $ 18,585 | ||
| Investments, fair value | $ 17,540 | $ 16,672 | ||
| Percent of net assets | 6.90% | 6.40% | 6.90% | |
| Debt Investments | Oil & Gas Refining & Marketing | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 10,248 | $ 10,243 | ||
| Investments, fair value | $ 10,408 | $ 10,404 | ||
| Percent of net assets | 4.20% | 3.90% | 4.20% | |
| Debt Investments | Oil & Gas Storage & Transportation | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 10,056 | $ 10,077 | ||
| Investments, fair value | $ 10,266 | $ 10,158 | ||
| Percent of net assets | 4.10% | 3.90% | 4.10% | |
| Debt Investments | Office Services & Supplies | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 16,000 | $ 5,684 | ||
| Investments, fair value | $ 15,880 | $ 5,159 | ||
| Percent of net assets | 6.30% | 2.00% | 6.30% | |
| Debt Investments | Packaged Foods & Meats | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 3,580 | $ 3,973 | ||
| Investments, fair value | $ 3,626 | $ 4,033 | ||
| Percent of net assets | 1.40% | 1.60% | 1.40% | |
| Debt Investments | Paper Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 8,503 | $ 8,838 | ||
| Investments, fair value | $ 8,892 | $ 9,276 | ||
| Percent of net assets | 3.50% | 3.60% | 3.50% | |
| Debt Investments | Pharmaceuticals | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 12,031 | |||
| Investments, fair value | $ 12,027 | |||
| Percent of net assets | 4.70% | |||
| Debt Investments | Real Estate Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 10,147 | $ 20,865 | ||
| Investments, fair value | $ 9,380 | $ 20,395 | ||
| Percent of net assets | 3.70% | 7.90% | 3.70% | |
| Debt Investments | Research & Consulting Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 4,761 | $ 4,748 | ||
| Investments, fair value | $ 4,829 | $ 4,831 | ||
| Percent of net assets | 1.90% | 1.90% | 1.90% | |
| Debt Investments | Specialized Consumer Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 28,514 | $ 25,952 | ||
| Investments, fair value | $ 29,102 | $ 26,088 | ||
| Percent of net assets | 11.40% | 10.00% | 11.40% | |
| Debt Investments | Specialized Finance | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 96,439 | $ 95,079 | ||
| Investments, fair value | $ 96,563 | $ 95,077 | ||
| Percent of net assets | 38.20% | 36.60% | 38.20% | |
| Debt Investments | Systems Software | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 18,686 | $ 18,657 | ||
| Investments, fair value | $ 19,281 | $ 19,360 | ||
| Percent of net assets | 7.70% | 7.50% | 7.70% | |
| Debt Investments | Technology Hardware, Storage & Peripherals | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 11,379 | $ 11,437 | ||
| Investments, fair value | $ 11,395 | $ 11,457 | ||
| Percent of net assets | 4.50% | 4.40% | 4.50% | |
| Debt Investments | Transaction & Payment Processing Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 35,884 | $ 36,745 | ||
| Investments, fair value | $ 36,146 | $ 36,904 | ||
| Percent of net assets | 14.20% | 14.10% | 14.20% | |
| Subordinated Debt [Member] | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,331 | $ 1,269 | ||
| Investments, fair value | 1,345 | 1,286 | ||
| Equity Investments | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 75,885 | 75,288 | ||
| Investments, fair value | $ 62,923 | $ 58,535 | ||
| Percent of net assets | 24.80% | 22.50% | 24.80% | |
| Equity Investments | Advertising | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 653 | $ 633 | ||
| Investments, fair value | $ 358 | $ 322 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Equity Investments | Application Software | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,682 | $ 1,682 | ||
| Investments, fair value | $ 1,690 | $ 1,853 | ||
| Percent of net assets | 0.70% | 0.70% | 0.70% | |
| Equity Investments | Building Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 24 | $ 24 | ||
| Equity Investments | Construction & Engineering | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 404 | 404 | ||
| Investments, fair value | $ 247 | 57 | ||
| Percent of net assets | 0.10% | 0.10% | ||
| Equity Investments | Diversified Chemicals | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 4,537 | 4,537 | ||
| Investments, fair value | $ 10,238 | $ 4,784 | ||
| Percent of net assets | 4.10% | 1.80% | 4.10% | |
| Equity Investments | Diversified Support Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,652 | $ 1,635 | ||
| Investments, fair value | $ 951 | $ 774 | ||
| Percent of net assets | 0.40% | 0.30% | 0.40% | |
| Equity Investments | Education Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 3,291 | $ 3,291 | ||
| Investments, fair value | $ 2,531 | $ 3,291 | ||
| Percent of net assets | 1.00% | 1.30% | 1.00% | |
| Equity Investments | Environmental & Facilities Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 942 | $ 942 | ||
| Investments, fair value | $ 1,577 | $ 1,645 | ||
| Percent of net assets | 0.60% | 0.60% | 0.60% | |
| Equity Investments | Food Distributors | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 317 | $ 317 | ||
| Investments, fair value | $ 343 | $ 264 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Equity Investments | Household Appliances | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,100 | $ 1,100 | ||
| Investments, fair value | $ 911 | $ 1,003 | ||
| Percent of net assets | 0.40% | 0.40% | 0.40% | |
| Equity Investments | Industrial Machinery & Supplies & Components | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 883 | $ 788 | ||
| Investments, fair value | $ 439 | $ 561 | ||
| Percent of net assets | 0.10% | 0.20% | 0.10% | |
| Equity Investments | Interactive Media & Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 851 | $ 851 | ||
| Investments, fair value | $ 1,961 | $ 1,963 | ||
| Percent of net assets | 0.80% | 0.80% | 0.80% | |
| Equity Investments | IT Consulting And Other Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 1,612 | $ 1,612 | ||
| Investments, fair value | 112 | $ 987 | ||
| Percent of net assets | 0.40% | |||
| Equity Investments | Leisure Facilities | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 2,734 | $ 2,734 | ||
| Investments, fair value | $ 610 | $ 712 | ||
| Percent of net assets | 0.30% | 0.30% | 0.30% | |
| Equity Investments | Leisure Products | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 4,060 | $ 4,060 | ||
| Equity Investments | Office Services & Supplies | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 18 | 13 | ||
| Equity Investments | Other Specialty Retail | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 514 | 514 | ||
| Investments, fair value | $ 625 | $ 735 | ||
| Percent of net assets | 0.20% | 0.30% | 0.20% | |
| Equity Investments | Paper & Plastic Packaging Products & Materials | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 400 | $ 400 | ||
| Equity Investments | Real Estate Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 840 | 840 | ||
| Investments, fair value | 31 | |||
| Equity Investments | Research & Consulting Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | 333 | 333 | ||
| Investments, fair value | $ 286 | $ 312 | ||
| Percent of net assets | 0.10% | 0.10% | 0.10% | |
| Equity Investments | Specialized Consumer Services | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 797 | $ 797 | ||
| Investments, fair value | $ 439 | $ 468 | ||
| Percent of net assets | 0.20% | 0.20% | 0.20% | |
| Equity Investments | Specialized Finance | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 21,564 | $ 21,104 | ||
| Investments, fair value | $ 22,361 | $ 21,602 | ||
| Percent of net assets | 8.80% | 8.30% | 8.80% | |
| Equity Investments | Systems Software | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 19,568 | $ 19,568 | ||
| Investments, fair value | $ 9,149 | $ 9,144 | ||
| Percent of net assets | 3.60% | 3.50% | 3.60% | |
| Equity Investments | Technology Hardware, Storage & Peripherals | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, amortized cost | $ 7,109 | $ 7,109 | ||
| Investments, fair value | $ 8,095 | $ 8,027 | ||
| Percent of net assets | 3.20% | 3.10% | 3.20% | |
| Money Market Funds | ||||
| Schedule of Investments [Line Items] | ||||
| Percent of net assets | 9.10% | 8.10% | 9.10% | |
| Money Market Funds amortized cost | $ 22,964 | $ 21,048 | ||
| Money Market Fair Value | $ 22,964 | $ 21,048 | ||
| Goldman Sachs Money Market Fund (CUSIP: 38141W315) | ||||
| Schedule of Investments [Line Items] | ||||
| Percent of net assets | 4.70% | 3.40% | 4.70% | |
| Weighted average interest rate | 3.33% | 3.34% | 3.33% | |
| Money Market Funds amortized cost | $ 11,887 | $ 8,829 | ||
| Money Market Fair Value | $ 11,887 | $ 8,829 | ||
| Invesco Treasury Money Market Fund (CUSIP: 825252406) | ||||
| Schedule of Investments [Line Items] | ||||
| Percent of net assets | 2.80% | 2.70% | 2.80% | |
| Weighted average interest rate | 3.56% | 3.69% | 3.56% | |
| Money Market Funds amortized cost | $ 7,094 | $ 7,032 | ||
| Money Market Fair Value | $ 7,094 | $ 7,032 | ||
| Dreyfus Treasury Obligations Cash Management Fund (CUSIP: 261908107) | ||||
| Schedule of Investments [Line Items] | ||||
| Percent of net assets | 1.60% | 2.00% | 1.60% | |
| Weighted average interest rate | 3.52% | 3.65% | 3.52% | |
| Money Market Funds amortized cost | $ 3,983 | $ 5,187 | ||
| Money Market Fair Value | 3,983 | 5,187 | ||
| Non-controlled/non-affiliate company investments | ||||
| Schedule of Investments [Line Items] | ||||
| Investments, fair value | $ 421,454 | $ 436,589 |