Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Borrowings Long-Term Debt, Unclassified [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum High Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Diamondback Acquisition, Inc. 2 Diamondback Acquisition, Inc. 2 [Member] Diamondback Acquisition, Inc. 2 Subsequent Event Subsequent Event [Member] Principal Amount Reported Value Measurement [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Interest and dividend receivable Increase (Decrease) in Interest and Dividends Receivable Segment Reporting [Abstract] Payable for unsettled securities purchased Payable, Investment, Purchase Schedule of Portfolio Investments by Level in the Fair Value Hierarchy Fair Value, Assets Measured on Recurring Basis [Table Text Block] Common stock, par value $0.001, 500,000,000 shares authorized, 95,740,093 and $95,740,092.6618029 shares issued and outstanding, respectively Common Stock, Value, Issued Interest and other financing expenses Interest Expense, Operating and Nonoperating Schedule of Information Related to Borrowings Schedule of Long-Term Debt Instruments [Table Text Block] % of Capital Commitments funded Investment Company, Contributed Capital to Committed Capital Ratio KWOR Intermediate I, LLC KWOR Intermediate I, LLC [Member] KWOR Intermediate I, LLC Credit Facility Line of Credit [Member] Entity Ex Transition Period Entity Ex Transition Period Restatement Determination Date Restatement Determination Date Funded Capital Commitments Investment Company, Contributed Capital Investment Company, Contributed Capital Foreside Financial Group Foreside Financial Group, LLC [Member] Foreside Financial Group, LLC Kele Holdco, Inc. Kele Holdco, Inc. [Member] Kele Holdco, Inc. Non-controlled/Non-affiliated Investment, Unaffiliated Issuer [Member] CG Group Holdings, LLC CG Group Holdings, LLC [Member] CG Group Holdings, LLC Per share data: Investment Company, Per Share Data [Abstract] Investment Company, Per Share Data Proceeds from sales and paydowns of investments (1) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Atlas AU Bidco Pty Ltd Atlas AU Bidco Pty Ltd [Member] Atlas AU Bidco Pty Ltd MAI Capital Management Intermediate LLC MAI Capital Management Intermediate LLC [Member] MAI Capital Management Intermediate LLC Investments [Domain] Investments [Domain] Fee income Fee Income Management fee payable Increase (Decrease) in Management Fee Payable Agreements and Related Parties Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers into Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Entity Address, State or Province Entity Address, State or Province Cash paid for purchase of drawn portion of revolving credit facilities Drawn Revolving Credit Facilities [Member] Drawn Revolving Credit Facilities PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Radwell Parent, LLC Radwell Parent, LLC [Member] Radwell Parent, LLC Weighted average shares of common stock outstanding - basic (in shares) Denominator for basic weighted average share (in shares) Average weighted shares outstanding for the period - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Amortization of purchase discount Accretion (Amortization) of Discounts and Premiums, Investments Percentage of shares hold under employee benefit plan Percentage of Shares Hold Under Employee Benefit Plan Percentage of Shares Hold Under Employee Benefit Plan Ciklum Inc. Ciklum Inc. [Member] Ciklum Inc. Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Schedule of Investments [Abstract] Investment Company, Nonconsolidated Subsidiary [Line Items] Investment Company, Nonconsolidated Subsidiary [Line Items] New Mountain Capital New Mountain Capital [Member] New Mountain Capital Entity Address, City or Town Entity Address, City or Town PDI TA Holdings, Inc. PDI TA Holdings, Inc. [Member] PDI TA Holdings, Inc. Investments at fair value Investments, At Fair Value [Member] Investments, At Fair Value Total expenses Investment Company, Expense Ratio Including Fee Waiver And Reimbursements Investment Company, Expense Ratio Including Fee Waiver And Reimbursements Average debt outstanding Average debt outstanding — Wells Credit Facility Long-Term Debt, Average Amount Outstanding Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of accounting Basis of Accounting, Policy [Policy Text Block] Interest Rate Type Interest Rate Type Risk [Member] Interest Rate Type Risk Non-cash operating activities: Noncash Operating Activities [Abstract] Noncash Operating Activities Number of investments held Investment Company, Number Of Investments Held Investment Company, Number Of Investments Held Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Floating rates Debt Securities, Floating Interest Rate [Member] Debt Securities, Floating Interest Rate Reinvestment of distributions Stock Issued During Period, Value, Dividend Reinvestment Plan Centegix Intermediate II, LLC Centegix Intermediate II, LLC [Member] Centegix Intermediate II, LLC Level II Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Net investment income (in dollars per share) Investment Company, Investment Income (Loss), Per Share, Basic Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Interest Rate Investment Interest Rate DT1 Midco Corp 2 DT1 Midco Corp 2 [Member] DT1 Midco Corp 2 Investments Schedule of Investments [Text Block] United States UNITED STATES Auctane Inc. (fka Stamps.com Inc.) Auctane Inc. (fka Stamps.com Inc.) [Member] Auctane Inc. (fka Stamps.com Inc.) Dividend income Dividend Income, Operating RLG Holdings, LLC, First Lien RLG Holdings, LLC, First Lien [Member] RLG Holdings, LLC, First Lien Subsequent Event Type [Axis] Subsequent Event Type [Axis] Upon investment period expiration, period to commence the wind up of operations, extension Investment Company, Expiration Of Investment Period, Commencement Of Wind Up Of Operations, Extension Period Investment Company, Expiration Of Investment Period, Commencement Of Wind Up Of Operations, Extension Period Concentration Risk Type [Axis] Concentration Risk Type [Axis] Maximum organizational expenses Organizational Expenses, Maximum, Amount Organizational Expenses, Maximum, Amount Total expenses Investment Income, Investment Expense Recent accounting standards updates New Accounting Pronouncements, Policy [Policy Text Block] Earnings per share Earnings Per Share, Policy [Policy Text Block] Second lien Debt Securities, Second Lien [Member] Debt Securities, Second Lien Use of estimates Use of Estimates, Policy [Policy Text Block] DT1 Midco Corp DT1 Midco Corp [Member] DT1 Midco Corp Amortization of deferred financing costs Amortization of financing costs Amortization of Debt Issuance Costs Food & Beverage Food and Beverage Sector [Member] Trinity Air Consultants Holdings Corporation Trinity Air Consultants Holdings Corporation [Member] Trinity Air Consultants Holdings Corporation Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Stock issued through the DRIP (in shares) Shares issued from the reinvestment of distributions (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Net borrowings Long-Term Debt Average net assets for the period Investment Company, Average Net Assets Equity and other Other Security Investments [Member] New ACI Buyer LLC New ACI Buyer LLC [Member] New ACI Buyer LLC Document Period End Date Document Period End Date Businessolver.com, Inc. Businessolver.com, Inc. [Member] Businessolver.com, Inc. Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] PPV Intermediate Holdings, LLC PPV Intermediate Holdings, LLC [Member] PPV Intermediate Holdings, LLC Wells Credit Facility Wells Credit Facility [Member] Wells credit facility Net Assets Equity [Text Block] Vessco Midco Holdings, LLC Vessco Midco Holdings, LLC [Member] Vessco Midco Holdings, LLC DOCS, MSO, LLC DOCS, MSO, LLC [Member] DOCS, MSO, LLC Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Unfunded Commitments on Revolving Credit Facilities Unfunded Debt Securities, Revolving Credit Facilities [Member] Unfunded Debt Securities, Revolving Credit Facilities Entity Shell Company Entity Shell Company Net (decrease) increase in net assets Stockholders' Equity, Period Increase (Decrease) Schedule of Investments Investment Holdings, Schedule of Investments [Table Text Block] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus RailPros Parent, LLC RailPros Parent, LLC [Member] RailPros Parent, LLC Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Capital transactions Investment Company, Capital Share Transaction, Increase (Decrease) [Abstract] Total liabilities Liabilities Discount rate Measurement Input, Discount Rate [Member] Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities: Adjustments To Reconcile Net Assets From Operations To Cash Provided by (Used in) Operating Activities [Abstract] Adjustments To Reconcile Net Assets From Operations To Cash Provided by (Used in) Operating Activities Geographical [Domain] Geographical [Domain] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Legends Hospitality Holding Company, LLC Legends Hospitality Holding Company, LLC [Member] Legends Hospitality Holding Company, LLC Schedule of Investments [Table] Schedule of Investments [Table] Zone Climate Services, Inc. Zone Climate Services, Inc. [Member] Zone Climate Services, Inc. Vehlo Purchaser, LLC Vehlo Purchaser, LLC [Member] Vehlo Purchaser, LLC Credit Facility [Domain] Credit Facility [Domain] Asset Class [Domain] Asset Class [Domain] Related Party Transactions [Abstract] Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Deferred financing costs Debt, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted average shares of common stock outstanding - diluted (in shares) Denominator for diluted weighted average share (in shares) Average weighted shares outstanding for the period - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Beacon Pointe Harmony, LLC Beacon Pointe Harmony, LLC [Member] Beacon Pointe Harmony, LLC Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Assets invested threshold used in base management fee calculation Management And Service Fees, Base Rate Calculation, Assets Invested, Threshold Management And Service Fees, Base Rate Calculation, Assets Invested, Threshold Line of Credit Facility [Table] Line of Credit Facility [Table] Transfers out of Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Underlying Security Market Price Change Underlying Security Market Price Change, Percent Interest and dividend receivable Dividend and Interest Receivable Financial Support to Nonconsolidated Legal Entity [Axis] Financial Support to Nonconsolidated Legal Entity [Axis] Schedule of Changes in Level III Portfolio Investments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] MedX Holdings, LLC MedX Holdings, LLC [Member] MedX Holdings, LLC Other general and administrative expenses Other General and Administrative Expense Investment Company, Financial Highlights [Roll Forward] Investment Company, Financial Highlights [Roll Forward] Threshold percentage for difference between quotes resulting in additional fair value procedures Fair Value Measurements, Quote Difference, Additional Fair Value Procedures Performed, Threshold, Percentage Fair Value Measurements, Quote Difference, Additional Fair Value Procedures Performed, Threshold, Percentage Superman Holdings, LLC Superman Holdings, LLC [Member] Superman Holdings, LLC Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items] Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items] Level I Fair Value, Inputs, Level 1 [Member] Investment Company, Net Assets [Roll Forward] Investment Company, Net Assets [Roll Forward] Organization, Consolidation and Presentation of Financial Statements [Abstract] Coupa Holdings, LLC Coupa Holdings, LLC [Member] Coupa Holdings, LLC Investment owned interest income Investment Owned, Interest Income Investment Owned, Interest Income Net investment income Investment Company, Investment Income (Loss) Ratio Summary of Investment Holdings [Line Items] Summary of Investment Holdings [Line Items] All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Cash received for purchase of undrawn portion of revolving credit or delayed draw facilities Proceeds from Purchase of Undrawn Portion of Investment, Operating Activity Proceeds from Purchase of Undrawn Portion of Investment, Operating Activity Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayment of Wells Credit Facility Repayments of Long-Term Lines of Credit KENG Acquisition, Inc. KENG Acquisition, Inc. [Member] KENG Acquisition, Inc. Non-usage fee Line of Credit Facility, Commitment Fee Amount Borrowings Long-Term Debt, Fair Value Upon investment period expiration, period to commence the wind up of operations Investment Company, Expiration Of Investment Period, Commencement Of Wind Up Of Operations, Period Investment Company, Expiration Of Investment Period, Commencement Of Wind Up Of Operations, Period CFS Management, LLC CFS Management, LLC [Member] CFS Management, LLC Asset coverage ratio Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio Concentration Risk Type [Domain] Concentration Risk Type [Domain] Distributions Investment Company, Distribution [Policy Text Block] Accounting Changes and Error Corrections [Abstract] DCA Investment Holding, LLC DCA Investment Holding, LLC [Member] DCA Investment Holding, LLC Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] CRCI Longhorn Holdings, Inc. CRCI Longhorn Holdings, Inc. [Member] CRCI Longhorn Holdings, Inc. Debt Disclosure [Abstract] Deferred financing costs, accumulated amortization Accumulated Amortization, Debt Issuance Costs Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Market & income approach Valuation, Market And Income Approach [Member] Valuation, Market And Income Approach Segment Reporting Segment Reporting [Text Block] Minimum Low Minimum [Member] Wells Credit Facility Credit facility outstanding balance Long-Term Line of Credit Meta Buyer LLC Meta Buyer LLC [Member] Meta Buyer LLC Investment Type [Axis] Investment Type [Axis] Expiration Date Trading Arrangement Expiration Date Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Packaging Coordinators Midco, Inc. 2 Packaging Coordinators Midco, Inc. 2 [Member] Packaging Coordinators Midco, Inc. 2 Assets Invested equal to or less than threshold Investment Management Agreement, Assets Invested Equal To Or Less Than Threshold [Member] Investment Management Agreement, Assets Invested Equal To Or Less Than Threshold Liabilities Liabilities [Abstract] Thermostat Purchaser III, Inc. Thermostat Purchaser III, Inc. [Member] Thermostat Purchaser III, Inc. Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Regulation Regulatory Capital Requirements For Investment Companies [Text Block] Regulatory Capital Requirements For Investment Companies Software Software Sector [Member] Software Sector Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Borrowing capacity, first percentage Line Of Credit Facility, Borrowing Capacity, First Percentage Line Of Credit Facility, Borrowing Capacity, First Percentage Threshold percentage for spread between bid and ask quotes resulting in additional fair value procedures Fair Value Measurements, Spread Between Bid And Ask Quote, Additional Fair Value Procedures Performed, Threshold, Percentage Fair Value Measurements, Spread Between Bid And Ask Quote, Additional Fair Value Procedures Performed, Threshold, Percentage Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Subordinated Subordinated Debt [Member] Wealth Enhancement Group, LLC Wealth Enhancement Group, LLC [Member] Wealth Enhancement Group, LLC Nonrelated Parties Nonrelated Party [Member] Payable to affiliates/ Other liabilities Other Liabilities Affiliates Affiliated Entity [Member] Investment Type Investment Type Concentration Risk [Member] Investment Type Concentration Risk KWOR Acquisition, Inc. KWOR Acquisition, Inc. [Member] KWOR Acquisition, Inc. Healthspan Buyer, LLC Healthspan Buyer, LLC [Member] Healthspan Buyer, LLC Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Net investment income (loss) Net investment income (loss) Investment Income, Operating, after Expense and Tax Common stock, shares authorized (in shares) Common Stock, Shares Authorized Assets under management Assets under Management, Carrying Amount Exercise Price Award Exercise Price Related Party Transaction [Axis] Related Party Transaction [Axis] Notorious Topco, LLC Notorious Topco, LLC [Member] Notorious Topco, LLC Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Borrowing capacity, fourth percentage Line Of Credit Facility, Borrowing Capacity, Fourth Percentage Line Of Credit Facility, Borrowing Capacity, Fourth Percentage KPSKY Acquisition Inc. KPSKY Acquisition Inc. [Member] KPSKY Acquisition Inc. Measurement Input Investment Company, Investment Owned, Measurement Input Investments, cost Cost Investment Owned, Cost Interest payable Interest Payable Receivable from unsettled securities sold Receivable, Investment, Sale NC Topco, LLC NC Topco, LLC [Member] NC Topco, LLC Management fee Management Fee Expense Deferred financing costs (net of accumulated amortization of $8,520 and $7,573, respectively) Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Financial Highlights Investment Company, Financial Highlights [Text Block] Equity investment Equity Method Investments Consumer Services Consumer Services Sector [Member] Consumer Services Sector Bonterra LLC 2 Bonterra LLC 2 [Member] Bonterra LLC 2 PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Total gains or losses included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Community Management Holdings MidCo 2, LLC Community Management Holdings MidCo 2, LLC [Member] Community Management Holdings MidCo 2, LLC Cash paid for purchase of investments Payment for Purchase, Investment, Operating Activity Business Products Business Products Sector [Member] Business Products Sector Adoption Date Trading Arrangement Adoption Date Total net assets Net assets at the beginning of the period Net assets at the end of the period Equity, Attributable to Parent Baker Tilly Advisory Group, LP Baker Tilly Advisory Group, LP [Member] Baker Tilly Advisory Group, LP Investment Company, Nonconsolidated Subsidiary [Table] Investment Company, Nonconsolidated Subsidiary [Table] Business Services Business Services Sector [Member] Business Services Sector Assets Assets [Abstract] EBITDA multiple Measurement Input, EBITDA Multiple [Member] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Borrowing capacity, second percentage Line Of Credit Facility, Borrowing Capacity, Second Percentage Line Of Credit Facility, Borrowing Capacity, Second Percentage Investment, Issuer Affiliation [Domain] Investment, Issuer Affiliation [Domain] Financing Commitment Letter to Purchase Investments Financing Commitment Letter to Purchase Investments [Member] Financing Commitment Letter to Purchase Investments Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Safety Borrower Holdings LLC Safety Borrower Holdings LLC [Member] Safety Borrower Holdings LLC Packaging Coordinators Midco, Inc Packaging Coordinators Midco, Inc [Member] Packaging Coordinators Midco, Inc Pioneer Buyer I, LLC Pioneer Buyer I, LLC [Member] Pioneer Buyer I, LLC Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Weighted Average Weighted Average [Member] Power Grid Holdings, Inc. Power Grid Holdings, Inc. [Member] Power Grid Holdings, Inc. Notorious Buyer, LLC Notorious Buyer, LLC [Member] Notorious Buyer, LLC All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Incomes taxes Income Tax, Policy [Policy Text Block] Net cash flows provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Foundational Education Group, Inc. Foundational Education Group, Inc. [Member] Foundational Education Group, Inc. Income Statement [Abstract] Net Assets Equity, Attributable to Parent [Abstract] Low Voltage Holdings Inc Low Voltage Holdings Inc [Member] Low Voltage Holdings Inc Document Transition Report Document Transition Report Net increase in net asset value from capital transactions (in dollars per share) Investment Company, Tax Return of Capital Distribution, Per Share Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Net realized and unrealized (losses) gains (in dollars per share) Investment Company, Gain (Loss) on Investment, Per Share Expenses Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net realized and unrealized (losses) gains Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, after Tax TMK Hawk Parent, Corp. TMK Hawk Parent, Corp. [Member] TMK Hawk Parent, Corp. Distribution declared and payable Noncash Distribution Declared and Payable Noncash Distribution Declared and Payable Net change in unrealized appreciation (depreciation) of investments Net change in unrealized appreciation (depreciation) of investments Debt and Equity Securities, Unrealized Gain (Loss) Interest rate margin Debt Instrument, Basis Spread on Variable Rate Other Commitments [Domain] Other Commitments [Domain] Spread Investment, Basis Spread, Variable Rate City Area Code City Area Code All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Investment, Issuer Name [Domain] Investment, Issuer Name [Domain] Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] GC Waves Holdings, Inc. GC Waves Holdings, Inc. [Member] GC Waves Holdings, Inc. Net realized (losses) gains on investments Net realized gains (losses) on investments Debt and Equity Securities, Realized Gain (Loss) Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] Consumer Products Consumer Products Sector [Member] Consumer Products Sector Investment Management Agreement Investment Management Agreement [Member] Investment Management Agreement Industry Sector [Axis] Industry Sector [Axis] Other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Principal Amount, Par Value Investment Owned, Balance, Principal Amount Bridge financing commitments Unfunded Debt Securities, Bridge Facilities [Member] Unfunded Debt Securities, Bridge Facilities Measurement Basis [Axis] Measurement Basis [Axis] Fetch, Inc. Fetch, Inc. [Member] Fetch, Inc. Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Cash equivalents Cash Equivalents, at Carrying Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Adelaide Borrower, LLC Adelaide Borrower, LLC [Member] Adelaide Borrower, LLC Weighted average interest rate Long-Term Debt, Weighted Average Interest Rate, over Time Revolving Credit Facility Revolving Credit Facility [Member] Assets invested maximum amount when base management fee is calculated based on a blended rate Management And Service Fees, Base Rate Calculation Based On Blended Rate, Assets Invested, Maximum Management And Service Fees, Base Rate Calculation Based On Blended Rate, Assets Invested, Maximum Fair value Fair Value Measurement, Policy [Policy Text Block] Investment Company [Abstract] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Net increase in net assets resulting from operations (in dollars per share) Investment Company, Investment Income (Loss) from Operations, Per Share USRP Holdings, Inc. USRP Holdings, Inc. [Member] USRP Holdings, Inc. Schedule of Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Common stock, shares outstanding (in shares) Shares outstanding at end of period (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Earnings per share diluted (in dollars per share) Earnings Per Share, Diluted HIG Operations Holdings, Inc. HIG Operations Holdings, Inc. [Member] HIG Operations Holdings, Inc. Entity Current Reporting Status Entity Current Reporting Status Net cash flows (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Runway Bidco, LLC Runway Bidco, LLC [Member] Runway Bidco, LLC Total net (decrease) increase in net assets resulting from capital transactions Investment Company, Capital Share Transaction and Dividend Distribution, Increase (Decrease) Investment Company, Capital Share Transaction and Dividend Distribution, Increase (Decrease) Interest income (excluding Payment-in-kind ("PIK") interest income) Interest Income, Operating, Paid in Cash Total return (as a percent) Investment Company, Total Return Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Specialty Chemicals & Materials Chemicals Sector [Member] Proceeds from Wells Credit Facility Proceeds from Long-Term Lines of Credit Unfunded Debt Investments Unfunded Debt Securities [Member] Unfunded Debt Securities Low Voltage Holdings Inc. 2 Low Voltage Holdings Inc. 2 [Member] Low Voltage Holdings Inc. 2 Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Fixed rates Debt Securities, Fixed Interest Rate [Member] Debt Securities, Fixed Interest Rate Financial Instruments [Domain] Financial Instruments [Domain] Investment period, automatic extension Investment Company, Investment Period, Automatic Extension Investment Company, Investment Period, Automatic Extension Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Fair Value Estimate of Fair Value Measurement [Member] Interest payable Increase (Decrease) in Interest Payable, Net Funded Investments Funded Securities [Member] Funded Securities Packaging Coordinators Midco, Inc. Packaging Coordinators Midco, Inc. [Member] Packaging Coordinators Midco, Inc. Schedule of Financial Highlights Investment Company, Financial Highlights [Table Text Block] OEConnection LLC OEConnection LLC [Member] OEConnection LLC Investment, Issuer Name [Axis] Investment, Issuer Name [Axis] EBITDA as defined for middle market business Investment Company, Investment Owned, Investment Objective, Middle Market Business, EBITDA Investment Company, Investment Owned, Investment Objective, Middle Market Business, EBITDA Healthcare Healthcare Sector [Member] PDQ.com Corporation PDQ.com Corporation [Member] PDQ.com Corporation Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Funded Debt Investments Funded Debt Securities [Member] Funded Debt Securities Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Distributions Declared on Common Stock Dividends Declared [Table Text Block] Organizational expenses Organizational Expenses, Policy [Policy Text Block] Organizational Expenses, Policy Current Fiscal Year End Date Current Fiscal Year End Date Investment Owned, Balance, Shares Investment Owned, Balance, Shares Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Related Party Transaction [Domain] Related Party Transaction [Domain] Financial Services & Technology Financial Services Sector [Member] First lien Debt Securities, First Lien [Member] Debt Securities, First Lien Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Securities Act File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Infogain Corporation Infogain Corporation [Member] Infogain Corporation Payable for unsettled securities purchased Increase (Decrease) in Payables under Repurchase Agreements Non-controlled/non-affiliated investments at fair value (cost of $1,430,809 and $1,525,141, respectively) Fair Value Investments at fair value Investment Owned, Fair Value Equity Equity Securities [Member] DCA TopCo LP DCA TopCo LP [Member] DCA TopCo LP Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Administrative expenses Administrative Fees Expense Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value eResearchTechnology, Inc. eResearchTechnology, Inc. [Member] eResearchTechnology, Inc. Daxko Acquisition Corporation Daxko Acquisition Corporation [Member] Daxko Acquisition Corporation Other Future Funding Commitments Unfunded Debt Securities, Delayed Draws Or Other Future Funding Commitments [Member] Unfunded Debt Securities, Delayed Draws Or Other Future Funding Commitments Victors Purchaser, LLC Victors Purchaser, LLC [Member] Victors Purchaser, LLC Entity Interactive Data Current Entity Interactive Data Current Receivable from unsettled securities sold Increase (Decrease) in Receivables under Repurchase Agreements Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Termination Date Trading Arrangement Termination Date Other Commitments [Axis] Other Commitments [Axis] Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Fullsteam Operations LLC Fullsteam Operations LLC [Member] Fullsteam Operations LLC Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Purchase of investments and delayed draw facilities Investments Including Delayed Draw Facilities [Member] Investments Including Delayed Draw Facilities Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Distribution payable Distribution Payable MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Agreement term Related Party Transaction, Term Related Party Transaction, Term Proceeds from sales and paydowns/ repayments on drawn revolver Proceeds from Disposition of Investment, Operating Activity Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] DECA Dental Holdings LLC DECA Dental Holdings LLC [Member] DECA Dental Holdings LLC Fair Value as of Grant Date Award Grant Date Fair Value Allworth Financial Group, L.P. Allworth Financial Group, L.P. [Member] Allworth Financial Group, L.P. Net asset value per share (in dollars per share) Net asset value, beginning balance (in dollars per share) Net asset value, ending balance (in dollars per share) Net Asset Value Per Share PetVet Care Centers, LLC PetVet Care Centers, LLC [Member] PetVet Care Centers, LLC PIK Investment, Interest Rate, Paid in Kind Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name (Increase) decrease in operating assets: Increase (Decrease) in Operating Assets [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Schedule of Principal Amount and Fair Values of Borrowings Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] Commitments and contingencies (See Note 8) Commitments and Contingencies Packaging Container and Packaging Sector [Member] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Investments threshold period past due for nonaccrual status Investment Owned, Nonaccrual, Threshold Period Past Due Investment Owned, Nonaccrual, Threshold Period Past Due Industry Type Industry Concentration Risk [Member] Industry Concentration Risk Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Distributions declared to stockholders from net investment income Investment Company, Dividend Distribution PIK interest income Interest Income, Operating, Paid in Kind Borrowing capacity, third percentage Line Of Credit Facility, Borrowing Capacity, Third Percentage Line Of Credit Facility, Borrowing Capacity, Third Percentage Bullhorn, Inc. Bullhorn, Inc. [Member] Bullhorn, Inc. Executive Category: Executive Category [Axis] Brave Parent Holdings, Inc. Brave Parent Holdings, Inc. [Member] Brave Parent Holdings, Inc. Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] The Ultimus Group Midco, LLC The Ultimus Group Midco, LLC [Member] The Ultimus Group Midco, LLC Other Commitments [Table] Other Commitments [Table] Australia AUSTRALIA CCBlue Bidco, Inc. CCBlue Bidco, Inc. [Member] CCBlue Bidco, Inc. All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Fair Value Disclosures [Text Block] Revenue multiple Measurement Input, Revenue Multiple [Member] Other Other Valuation Technique [Member] Other Valuation Technique Level III Fair Value, Inputs, Level 3 [Member] Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Assets invested greater than threshold Investment Management Agreement, Assets Invested Greater Than Threshold [Member] Investment Management Agreement, Assets Invested Greater Than Threshold Geographical [Axis] Geographical [Axis] Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Axis] Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Interest expense Interest Expense, Debt Other Commitments [Line Items] Other Commitments [Line Items] Revenue recognition Revenue [Policy Text Block] Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Management fee payable Management Fee Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code AAH Topco, LLC AAH Topco, LLC [Member] AAH Topco, LLC ACI Group Holdings, Inc. ACI Group Holdings, Inc. [Member] ACI Group Holdings, Inc. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Formation and Business Purpose Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Investment period, automatic extension, minimum written notice period Investment Company, Investment Period, Automatic Extension Or Termination, Written Notice Period, Minimum Investment Company, Investment Period, Automatic Extension Or Termination, Written Notice Period, Minimum Subsequent Event [Table] Subsequent Event [Table] GS Acquisitionco, Inc. GS Acquisitionco, Inc. [Member] GS Acquisitionco, Inc. Payable to affiliates Increase (Decrease) in Due to Affiliates Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Earnings per share basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Bonterra LLC Bonterra LLC [Member] Bonterra LLC Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Base management fee percentage Management and Service Fees, Base Rate Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated (overdistributed) undistributed earnings Retained Earnings (Accumulated Deficit) YLG Holdings, Inc. YLG Holdings, Inc. [Member] YLG Holdings, Inc. Education Education Sector [Member] Education Sector Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Summary of Investment Holdings [Table] Investment Holdings [Table] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Principal amount Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount Fair Value Measurement [Domain] Fair Value Measurement [Domain] RLG Holdings, LLC RLG Holdings, LLC [Member] RLG Holdings, LLC Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Net realized and unrealized (losses) gains Net Realized Gains (Losses) [Abstract] Net Realized Gains (Losses) AWP Group Holdings, Inc. AWP Group Holdings, Inc. [Member] AWP Group Holdings, Inc. Diamondback Acquisition, Inc. Diamondback Acquisition, Inc. [Member] Diamondback Acquisition, Inc. United Kingdom UNITED KINGDOM Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Percent of Total Investments at Fair Value Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Al Altius US Bidco, Inc. Al Altius US Bidco, Inc. [Member] Al Altius US Bidco, Inc. Non-cash financing activities: Noncash Financing Items [Abstract] Noncash Financing Items Total liabilities and net assets Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Purchases, including capitalized PIK and revolver fundings (1) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Industry Sector [Domain] Industry Sector [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Percent of Net Assets Investment Owned, Net Assets, Percentage Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Paid in capital in excess of par Additional Paid in Capital Wrench Group LLC Wrench Group LLC [Member] Wrench Group LLC Distribution & Logistics Distribution & Logistics Transportation Sector [Member] Borrowings Long-Term Debt [Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name USRP Holdings, Inc. USRP Holdings, Inc. 1 [Member] USRP Holdings, Inc. 1 Investment, Identifier [Axis] Investment, Identifier [Axis] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] KENE Acquisition, Inc. KENE Acquisition, Inc. [Member] KENE Acquisition, Inc. Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) [Member] Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) Proceeds from sales and paydowns of investments Investments Excluding Drawn Revolvers [Member] Investments Excluding Drawn Revolvers MRI Software LLC MRI Software LLC [Member] MRI Software LLC FS WhiteWater Borrower, LLC FS WhiteWater Borrower, LLC [Member] FS WhiteWater Borrower, LLC Distributions declared (in dollars per share) Distributions declared to stockholders from net investment income (in dollars per share) Investment Company, Distribution to Shareholders, Per Share Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Other commitments Other Commitment Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Investments Investment, Policy [Policy Text Block] Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Non-cash investment income Other Noncash Income (Expense) Lighthouse Buyer, Inc. Lighthouse Buyer, Inc. [Member] Lighthouse Buyer, Inc. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Entity Filer Category Entity Filer Category Capital Commitments Investment Company, Committed Capital Tennessee Bidco Limited Tennessee Bidco Limited [Member] Tennessee Bidco Limited Fortis Solutions Group, LLC Fortis Solutions Group, LLC [Member] Fortis Solutions Group, LLC TigerConnect, Inc. TigerConnect, Inc. [Member] TigerConnect, Inc. Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Galway Borrower LLC Galway Borrower LLC [Member] Galway Borrower LLC Effective interest rate Debt Instrument, Interest Rate During Period New ACI Holdings LLC New ACI Holdings LLC [Member] New ACI Holdings LLC Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Model N, Inc. Model N, Inc. [Member] Model N, Inc. Net change in unrealized (depreciation) appreciation for the period relating to those Level III assets that were still held by the Company at the end of the period: Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Total investment income Gross Investment Income, Operating Non-cash activity on investments Noncash Investment Activities, Operating Noncash Investment Activities, Operating Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One KWOR Intermediate I, LLC 2 KWOR Intermediate I, LLC 2 [Member] KWOR Intermediate I, LLC 2 CoreTrust Purchasing Group LLC CoreTrust Purchasing Group LLC [Member] CoreTrust Purchasing Group LLC Associations, Inc. Associations, Inc. [Member] Associations, Inc. Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation iCIMS, Inc. iCIMS, Inc. [Member] iCIMS, Inc. Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Portfolio turnover Investment Company, Portfolio Turnover Increase (decrease) in net assets resulting from operations: Net Income (Loss) Attributable to Parent [Abstract] Drawn revolvers Drawn Revolvers [Member] Drawn Revolvers Recent Accounting Standards Updates Accounting Standards Update and Change in Accounting Principle [Text Block] Net increase (decrease) in net assets resulting from operations Net increase (decrease) in net assets resulting from operations Numerator for basic & diluted earnings per share Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Total Investments [Member] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Ratio to average net assets: Investment Company, Ratio To Average Net Assets [Abstract] Investment Company, Ratio To Average Net Assets Jersey JERSEY Interest and other financing expenses Interest Expense, Policy [Policy Text Block] Investments at fair value that are non-qualifying assets as a percentage of total assets Investment Owned, At Fair Value, Non-Qualifying Assets, Percent Of Total Assets Investment Owned, At Fair Value, Non-Qualifying Assets, Percent Of Total Assets Diligent Corporation Diligent Corporation [Member] Diligent Corporation Investment income Revenues [Abstract] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Financial Support to Nonconsolidated Legal Entity [Domain] Financial Support to Nonconsolidated Legal Entity [Domain]