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Portfolio Company Investments - Schedule of Investments Type With Corresponding Percentage of Total Portfolio Investments (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 856,914 | $ 719,124
Percentage of Fair Value | 100.00% | 100.00%
Investments at cost | $ 827,390 | $ 621,786
Percentage of Cost | 100.00% | 100.00%
First Lien Debt |  |
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 488,334 | $ 354,922
Percentage of Fair Value | 57.00% | 49.40%
Investments at cost | $ 487,999 | $ 353,306
Percentage of Cost | 59.00% | 56.80%
Second Lien Debt |  |
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 177,222 | $ 158,815
Percentage of Fair Value | 20.70% | 22.10%
Investments at cost | $ 200,028 | $ 168,573
Percentage of Cost | 24.20% | 27.10%
Subordinated Debt |  |
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 81,759 | $ 36,064
Percentage of Fair Value | 9.50% | 5.00%
Investments at cost | $ 80,477 | $ 35,995
Percentage of Cost | 9.70% | 5.80%
Equity |  |
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 106,951 | $ 166,119
Percentage of Fair Value | 12.50% | 23.10%
Investments at cost | $ 55,563 | $ 60,589
Percentage of Cost | 6.70% | 9.80%
Warrants |  |
Summary of Investment Holdings [Line Items] |  |
Investments at Fair Value | $ 2,648 | $ 3,204
Percentage of Fair Value | 0.30% | 0.40%
Investments at cost | $ 3,323 | $ 3,323
Percentage of Cost | 0.40% | 0.50%

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