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Fair Value Measurements - Summary of Significant Unobservable Inputs by Valuation Technique to Determine Fair Value (Details)
$ in Thousands
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 425,996 $ 368,817
Level 3 | Enterprise Value | EBITDA Multiples    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity Fair Value 110,580 111,808
Equity Investments, Warrants fair value $ 2,568 $ 1,949
Level 3 | Enterprise Value | EBITDA Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 3.5 4
Equity investments, Warrants range 6 6
Level 3 | Enterprise Value | EBITDA Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 16 16.8
Equity investments, Warrants range 6 6
Level 3 | Enterprise Value | EBITDA Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 8.3 8.1
Equity investments, Warrants range 6 6
Level 3 | Enterprise Value | Revenue Multiples    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity Fair Value $ 6,897 $ 5,623
Equity Investments, Warrants fair value $ 135 $ 130
Level 3 | Enterprise Value | Revenue Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 0.9 0.9
Equity investments, Warrants range 4.5 4.5
Level 3 | Enterprise Value | Revenue Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 7.5 7.8
Equity investments, Warrants range 4.5 4.5
Level 3 | Enterprise Value | Revenue Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Equity Investments, Equity, Range 5.8 6.4
Equity investments, Warrants range 4.5 4.5
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 124,657 $ 97,706
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.092 0.10
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.188 0.152
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.126 0.125
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value   $ 3,750
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   8.5
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 508,153 $ 441,830
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.098 0.089
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.246 0.219
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.159 0.155
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 11,000 $ 11,000
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 1 1.1
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 1 1.1
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 1 1.1
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 2,775  
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 4.3  
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 4.3  
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 4.3  
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value   $ 3,275
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   4.3
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   4.3
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   4.3
Level 3 | Second Lien Debt | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 53,000 $ 18,000
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 159,567 $ 180,825
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.113 0.117
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.25 0.25
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.151 0.145
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Fair Value $ 2,123 $ 2,123
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.8 0.8
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.8 0.8
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range 0.8 0.8
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   5
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   5
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Investments, Range   5