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FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Investments (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) company | Dec. 31, 2024 USD ($) company
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value | $ 1,260,202 | [1],[2],[3] | $ 1,177,507 | [4],[5],[6]
Cost | $ 1,185,367 | [1],[3],[7] | $ 1,138,745 | [4],[6],[8]
Concentration risk, percentage (as a percent) | 100.00% |  | 100.00% |
Investment Owned, At Cost | Investment Type Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 100.00% |  | 100.00% |
Investment Owned, At Cost | Investment Type Concentration Risk | Nonperforming Financial Instruments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 4.60% |  | 5.60% |
Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 15.20% |  | 14.50% |
Investment Owned, At Cost | Investment Type Concentration Risk | First lien debt |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 84.60% |  | 85.20% |
Private Loan portfolio investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Number of portfolio companies | company | 81 |  | 84 |
Fair value | $ 750,900 |  | $ 677,900 |
Cost | $ 761,100 |  | $ 697,500 |
Weighted-average annual effective yield (as a percent) | 11.30% |  | 12.00% |
Average EBITDA | $ 31,500 |  | $ 28,600 |
Investment company, number of companies within portfolio excluded from EBITDA calculation | company | 4 |  | 2 |
Private Loan portfolio investments | Nonperforming Financial Instruments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Weighted-average annual effective yield (as a percent) | 10.40% |  | 11.40% |
Private Loan portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | Debt investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 92.00% |  | 93.90% |
Private Loan portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 8.00% |  | 6.10% |
Private Loan portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | First lien debt |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 99.90% |  | 99.90% |
LMM portfolio investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Number of portfolio companies | company | 55 |  | 57 |
Fair value | $ 466,700 |  | $ 436,100 |
Cost | $ 369,900 |  | $ 357,100 |
Weighted-average annual effective yield (as a percent) | 12.90% |  | 13.00% |
Average EBITDA | $ 10,700 |  | $ 10,800 |
Diluted equity ownership percentage (as a percent) | 9.00% |  | 9.00% |
Investment company, number of companies within portfolio excluded from EBITDA calculation | company | 3 |  | 3 |
LMM portfolio investments | Nonperforming Financial Instruments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Weighted-average annual effective yield (as a percent) | 12.10% |  | 12.20% |
LMM portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | Debt investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 69.80% |  | 67.80% |
LMM portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 30.20% |  | 32.20% |
LMM portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk | First lien debt |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Concentration risk, percentage (as a percent) | 99.90% |  | 99.90% |
[1] | All portfolio company headquarters are based in the United States, unless otherwise noted.
[2] | Investment Fair Value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.
[3] | All investments are LMM (as defined below) portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Fund’s investments, unless otherwise noted, are encumbered as security for one of the Credit Facilities (as defined below).
[4] | All portfolio company headquarters are based in the United States, unless otherwise noted.
[5] | Investment Fair Value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.
[6] | All investments are LMM portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Fund’s investments, unless otherwise noted, are encumbered as security for one of the Fund’s Credit Facilities.
[7] | Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[8] | Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

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