Annual report pursuant to Section 13 and 15(d)

FAIR VALUE HIERARCHY FOR INVESTMENTS???PORTFOLIO COMPOSITION - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)

v3.24.0.1
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 1,092,895 [1] $ 1,068,143 [2]
Significant Unobservable Inputs    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 1,092,895 $ 1,068,143
Significant Unobservable Inputs | Minimum | EBITDA multiple, outlier    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 2.0 2.0
Significant Unobservable Inputs | Minimum | Risk adjusted discount factor, outlier    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.080 0.065
Significant Unobservable Inputs | Maximum | EBITDA multiple, outlier    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 15.7 15.7
Significant Unobservable Inputs | Maximum | Risk adjusted discount factor, outlier    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.273 0.433
Significant Unobservable Inputs | Equity investments | Discounted cash flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 254,770 $ 215,861
Significant Unobservable Inputs | Equity investments | Discounted cash flow | Minimum | WACC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.109 0.104
Significant Unobservable Inputs | Equity investments | Discounted cash flow | Maximum | WACC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.225 0.225
Significant Unobservable Inputs | Equity investments | Discounted cash flow | Weighted Average | WACC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.144 0.143
Significant Unobservable Inputs | Equity investments | Discounted cash flow | Median | WACC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.155 0.157
Significant Unobservable Inputs | Equity investments | Market comparable / Enterprise value | Minimum | EBITDA multiple    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 4.9 4.3
Significant Unobservable Inputs | Equity investments | Market comparable / Enterprise value | Maximum | EBITDA multiple    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 9.2 8.5
Significant Unobservable Inputs | Equity investments | Market comparable / Enterprise value | Weighted Average | EBITDA multiple    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 7.3 7.2
Significant Unobservable Inputs | Equity investments | Market comparable / Enterprise value | Median | EBITDA multiple    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 6.5 6.4
Significant Unobservable Inputs | Debt investments | Discounted cash flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 777,003 $ 743,887
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Minimum | Risk adjusted discount factor    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.098 0.085
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Minimum | Expected principal recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.006 0.007
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Maximum | Risk adjusted discount factor    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.168 0.182
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Maximum | Expected principal recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 1.000 1.000
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Weighted Average | Risk adjusted discount factor    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.131 0.130
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Weighted Average | Expected principal recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.996 0.991
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Median | Risk adjusted discount factor    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.128 0.124
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Median | Expected principal recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 1.000 1.000
Significant Unobservable Inputs | Debt investments | Market approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 61,122 $ 108,395
Significant Unobservable Inputs | Debt investments | Market approach | Minimum | Third-party quote    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 4.5 5.6
Significant Unobservable Inputs | Debt investments | Market approach | Maximum | Third-party quote    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 99.2 98.5
Significant Unobservable Inputs | Debt investments | Market approach | Weighted Average | Third-party quote    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 85.0 85.7
Significant Unobservable Inputs | Debt investments | Market approach | Median | Third-party quote    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 89.5 90.0
[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.