Annual report pursuant to Section 13 and 15(d)

FAIR VALUE HIERARCHY FOR INVESTMENTS???PORTFOLIO COMPOSITION - Schedule of Investments at Fair Value Hierarchy (Details)

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FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Investments at Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: $ 1,092,895 [1] $ 1,068,143 [2]
Private Loan portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 595,326 559,763
LMM portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 386,956 352,661
Middle Market portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 85,990 126,744
Other Portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 24,623 28,975
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private Loan portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | LMM portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Middle Market portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Other Observable Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Other Observable Inputs (Level 2) | Private Loan portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Other Observable Inputs (Level 2) | LMM portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Other Observable Inputs (Level 2) | Middle Market portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Other Observable Inputs (Level 2) | Other Portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 0 0
Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 1,092,895 1,068,143
Significant Unobservable Inputs (Level 3) | Private Loan portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 595,326 559,763
Significant Unobservable Inputs (Level 3) | LMM portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 386,956 352,661
Significant Unobservable Inputs (Level 3) | Middle Market portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: 85,990 126,744
Significant Unobservable Inputs (Level 3) | Other Portfolio investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value: $ 24,623 $ 28,975
[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.