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Consolidated Schedule of Investments (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Schedule of Investments [Line Items] |  |  |
Percentage of debt securities contains floor rates |  | 79.50% | 77.40%
Aggregate cost of investments |  | $ 543,601 | $ 540,282
Aggregate gross unrealized appreciation |  | 31,500 | 36,300
Aggregate gross unrealized depreciation |  | 200 | 34,700
Net unrealized depreciation |  | $ 31,300 | $ 1,600
Percentage of qualifying assets to total assets |  | 87.10% | 86.60%
Maximum |  |  |
Schedule of Investments [Line Items] |  |  |
Floor rate |  | 5.25% |
Floor rate |  |  | 2.50%
Minimum |  |  |
Schedule of Investments [Line Items] |  |  |
Floor rate |  | 0.50% |
Floor rate |  |  | 0.50%
Investments |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 224.00% | 219.00%
Garrison Capital Equity Holdings II LLC |  |  |
Schedule of Investments [Line Items] |  |  |
Non controlling member interest rate |  | 17.50% | 17.50%
ATP Oil & Gas Corporation |  |  |
Schedule of Investments [Line Items] |  |  |
Royalty interest |  | 5.00% | 5.00%
Junior Secured Loan |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 17.00% | 18.00%
Aggregate cost of investments |  | $ 52,951 | $ 53,888
Senior Unsecured Bond |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  |  | 0.00%
Aggregate cost of investments |  |  | $ 416
Senior Unsecured Bond | Tank Partners Equipment Holdings, LLC |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  |  | 10.00%
Equity Securities |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 11.00% | 10.00%
Aggregate cost of investments |  | $ 34,077 | $ 31,280
CLO Subordinated Investments |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 4.00% | 4.00%
Asset Manager Affiliates |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 0.00% | 0.00%
Aggregate cost of investments | [1] | $ 17,791 | $ 17,791
Joint Ventures |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 25.00% | 28.00%
Aggregate cost of investments |  | $ 65,008 | $ 71,415
Derivatives |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 0.00% | 0.00%
Aggregate cost of investments |  | $ 31 | $ 31
Senior Secured Loan |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of net asset value at fair value |  | 166.00% | 159.00%
Aggregate cost of investments |  | $ 364,981 | $ 356,358
Investments For Federal Income Tax Purpose |  |  |
Schedule of Investments [Line Items] |  |  |
Aggregate cost of investments |  | $ 513,600 | $ 539,800
Controlled Affiliated Investments | Minimum |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of outstanding voting securities owned |  | 25.00% | 25.00%
Non-controlled Affiliated Investments | Minimum |  |  |
Schedule of Investments [Line Items] |  |  |
Percentage of outstanding voting securities owned |  | 5.00% | 5.00%
[1] | Represents the equity investment in the Asset Manager Affiliates.

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