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Investments - Additional Information (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) Member | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Investment Holdings [Line Items] |  |  |  |  |
CLO fund securities percentage of total assets | 1.60% |  | 1.60% |  |
Non qualified assets percentage of total assets | 12.90% |  | 13.40% |  |
Joint ventures percentage of total assets | 10.10% |  | 10.80% |  |
Fair Value | $ 471,255 |  | $ 467,865 |  |
Unfunded commitment to investee | 33,338 |  | 28,566 |  |
Level II |  |  |  |  |
Investment Holdings [Line Items] |  |  |  |  |
Fair Value | $ 66,000 |  | 65,300 |  |
Non Qualifying Assets |  |  |  |  |
Investment Holdings [Line Items] |  |  |  |  |
Investment portfolio percentage | 30.00% |  |  |  |
Joint venture |  |  |  |  |
Investment Holdings [Line Items] |  |  |  |  |
Investment income from investments in joint ventures | $ 1,700 | $ 2,500 |  |  |
Aggregate fair value of investments in joint venture | $ 53,200 |  | 59,300 |  |
F3C Joint Venture |  |  |  |  |
Investment Holdings [Line Items] |  |  |  |  |
F3C Joint venture ownership percentage | 62.80% |  |  |  |
Number of board of directors | Member | 4 |  |  |  |
Directors selected by company | Member | 2 |  |  |  |
Directors selected by Freedom 3 Opportunities | Member | 2 |  |  |  |
Fair Value | $ 13,500 |  | 14,300 |  |
Series A-Great Lakes Funding II LLC |  |  |  |  |
Investment Holdings [Line Items] |  |  |  |  |
Percentage of voting interest | 50.00% |  |  |  |
Fair Value | $ 39,600 |  | 45,000 | $ 39,600 | $ 45,000
Increase in aggregate commitment to investee | 50,000 |  |  |  |
Unfunded commitment to investee | $ 10,900 |  | $ 5,500 |  |

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