Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.3
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Thousands
Sep. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 1,103,813 [1] $ 1,068,143 [2]
Significant Unobservable Inputs    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total Level 3 investments $ 1,103,813 $ 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 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 0.075 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 0.335 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 $ 236,631 $ 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 0.107 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 0.156 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 4.5 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 9.0 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 7.2 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 6.4 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 $ 791,484 $ 743,887
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Minimum | Risk adjusted discount factor (4)    
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 0.007 0.007
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Maximum | Risk adjusted discount factor (4)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.177 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 (4)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.136 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 0.992 0.991
Significant Unobservable Inputs | Debt investments | Discounted cash flow | Median | Risk adjusted discount factor (4)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Measurement input 0.130 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 $ 75,698 $ 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 98.4 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 86.7 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 94.0 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.