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Investments - Schedule of Valuation Techniques and Significant Inputs of Level III Investments (Details) - Level III $ in Thousands | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 396,582 | $ 471,170
Debt securities | Enterprise Value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 26,391 | $ 10,142
Debt securities | Enterprise Value | Average EBITDA Multiple |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 14.5
Debt securities | Enterprise Value | Average EBITDA Multiple | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 7.8 |
Debt securities | Enterprise Value | Average EBITDA Multiple | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 9.5 |
Debt securities | Enterprise Value | Average EBITDA Multiple | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 7.8 |
Debt securities | Enterprise Value | Average Revenue Multiple |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 0.3
Debt securities | Enterprise Value | Recovery Rate Multiple |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 0.1
Debt securities | Enterprise Value | Recovery Rate Multiple | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 0.1 |
Debt securities | Enterprise Value | Recovery Rate Multiple | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 0.4 |
Debt securities | Enterprise Value | Recovery Rate Multiple | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 0.3 |
Debt securities | Enterprise Value | Expected Sale Proceeds |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 97.6 |
Debt securities | Enterprise Value | Average Settlement Value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 47.1 |
Debt securities | Enterprise Value | Recovery Rate Agreement |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 82.5 |
Debt securities | Income Approach |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 318,992 | $ 387,805
Debt securities | Income Approach | Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 6 | 5.4
Debt securities | Income Approach | Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 41.2 | 28.6
Debt securities | Income Approach | Discount Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 11.9 | 12.2
Debt securities | Recent Transaction |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 6,405 | $ 12,197
Debt securities | Recent Transaction | Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 10.9 | 11.9
Debt securities | Recent Transaction | Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 14.6 | 13.2
Debt securities | Recent Transaction | Discount Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 12 | 13
Equity Securities | Enterprise Value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 18,066 | $ 20,221
Equity Securities | Enterprise Value | Average EBITDA Multiple | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 5.5 |
Equity Securities | Enterprise Value | Average EBITDA Multiple | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 17.3 |
Equity Securities | Enterprise Value | Average EBITDA Multiple | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 7.2 |
Equity Securities | Enterprise Value | Expected Sale Proceeds |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 175 |
Equity Securities | Enterprise Value | Average EBITDA Multiple / WACC | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 0.4 | 0.4
Equity Securities | Enterprise Value | Average EBITDA Multiple / WACC | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 3.7 | 15.8
Equity Securities | Enterprise Value | Average EBITDA Multiple / WACC | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 1.1 | 6.73
Equity Securities | Enterprise Value | Book Value of Equity | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 1 |
Equity Securities | Enterprise Value | Book Value of Equity | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 1.6 |
Equity Securities | Enterprise Value | Book Value of Equity | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 1.6 |
Equity Securities | Enterprise Value | Recovery Rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 0.3
Equity Securities | Income Approach |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 451 | $ 1,013
Equity Securities | Income Approach | Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 15
Equity Securities | Income Approach | Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs |  | 0.193
Equity Securities | Income Approach | Discount Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 0.15 | 0.15
Equity Securities | Recent Transaction |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 672 | $ 671
Equity Securities | Recent Transaction | Discount Rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 12.4 | 0.124
CLO Fund Securities | Discounted Cash Flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 10,425 | $ 20,453
CLO Fund Securities | Discounted Cash Flow | Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 19.1 | 19.9
CLO Fund Securities | Discounted Cash Flow | Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 25.9 | 25.5
CLO Fund Securities | Discounted Cash Flow | Discount Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 22.2 | 22.3
CLO Fund Securities | Discounted Cash Flow | Recovery Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 65 | 65
CLO Fund Securities | Discounted Cash Flow | Recovery Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 75 | 75
CLO Fund Securities | Discounted Cash Flow | Recovery Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 70 | 70
CLO Fund Securities | Discounted Cash Flow | Probability of Default | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 1.8 | 1.5
CLO Fund Securities | Discounted Cash Flow | Probability of Default | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 2.5 | 2.5
CLO Fund Securities | Discounted Cash Flow | Probability of Default | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 2 | 1.9
CLO Fund Securities | Discounted Cash Flow | Prepayment Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 15 | 15
CLO Fund Securities | Discounted Cash Flow | Prepayment Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 25 | 25
CLO Fund Securities | Discounted Cash Flow | Prepayment Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 20 | 20
Joint Ventures | Discounted Cash Flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value of investments | $ 15,180 | $ 18,668
Joint Ventures | Discounted Cash Flow | Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 21.3 | 22.1
Joint Ventures | Discounted Cash Flow | Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 22.9 | 23.7
Joint Ventures | Discounted Cash Flow | Discount Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 22.1 | 22.9
Joint Ventures | Discounted Cash Flow | Recovery Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 65 | 65
Joint Ventures | Discounted Cash Flow | Recovery Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 75 | 75
Joint Ventures | Discounted Cash Flow | Recovery Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 70 | 70
Joint Ventures | Discounted Cash Flow | Probability of Default | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 2.8 | 2.8
Joint Ventures | Discounted Cash Flow | Probability of Default | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 3.3 | 3.3
Joint Ventures | Discounted Cash Flow | Probability of Default | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 3 | 3
Joint Ventures | Discounted Cash Flow | Prepayment Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 15 | 15
Joint Ventures | Discounted Cash Flow | Prepayment Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 25 | 25
Joint Ventures | Discounted Cash Flow | Prepayment Rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 20 | 20
Derivatives | Enterprise Value | Average EBITDA Multiple |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Range of Inputs | 2.5 | 3

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