Annual report [Section 13 and 15(d), not S-K Item 405]

FAIR VALUE HIERARCHY FOR INVESTMENTS???PORTFOLIO COMPOSITION - Schedule of Investments (Details)

v3.25.1
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Investments (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
company
Dec. 31, 2023
USD ($)
company
Summary of Investment Holdings [Line Items]    
Fair value $ 1,177,507 [1] $ 1,092,895 [2]
Cost $ 1,138,745 [3] $ 1,038,318 [4]
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) 5.60% 4.00%
Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 14.50% 13.30%
Investment Owned, At Cost | Investment Type Concentration Risk | First lien debt    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 85.20% 86.50%
Private Loan    
Summary of Investment Holdings [Line Items]    
Number of portfolio companies | company 84 78
Fair value $ 677,900 $ 595,300
Cost $ 697,500 $ 586,400
Weighted-average annual effective yield (as a percent) 12.00% 13.10%
Average EBITDA $ 28,600 $ 30,500
Investment company, number of companies within portfolio excluded from EBITDA calculation | company 2 1
Private Loan | Nonperforming Financial Instruments    
Summary of Investment Holdings [Line Items]    
Weighted-average annual effective yield (as a percent) 11.40% 12.60%
Private Loan | Investment Owned, At Cost | Investment Type Concentration Risk | Debt investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 93.90% 94.10%
Private Loan | Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 6.10% 5.90%
Private Loan | 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% 100.00%
LMM    
Summary of Investment Holdings [Line Items]    
Number of portfolio companies | company 57 50
Fair value $ 436,100 $ 387,000
Cost $ 357,100 $ 315,700
Weighted-average annual effective yield (as a percent) 13.00% 13.00%
Average EBITDA $ 10,800 $ 8,800
Diluted equity ownership percentage (as a percent) 9.00% 9.00%
Investment company, number of companies within portfolio excluded from EBITDA calculation | company 3  
LMM | Nonperforming Financial Instruments    
Summary of Investment Holdings [Line Items]    
Weighted-average annual effective yield (as a percent) 12.20% 13.00%
LMM | Investment Owned, At Cost | Investment Type Concentration Risk | Debt investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 67.80% 70.20%
LMM | Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 32.20% 29.80%
LMM | 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%
Middle Market    
Summary of Investment Holdings [Line Items]    
Number of portfolio companies | company 10 16
Fair value $ 39,400 $ 86,000
Cost $ 66,300 $ 114,700
Weighted-average annual effective yield (as a percent) 14.10% 13.00%
Average EBITDA $ 38,200 $ 74,200
Investment company, number of companies within portfolio excluded from EBITDA calculation | company 1  
Middle Market | Nonperforming Financial Instruments    
Summary of Investment Holdings [Line Items]    
Weighted-average annual effective yield (as a percent) 9.00% 9.90%
Middle Market | Investment Owned, At Cost | Investment Type Concentration Risk | Debt investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 87.80% 93.10%
Middle Market | Investment Owned, At Cost | Investment Type Concentration Risk | Equity investments    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage (as a percent) 12.20% 6.90%
Middle Market | 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% 100.00%
[1] 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.
[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] 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.
[4] 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.