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Consolidated Schedule of Investments (Parenthetical) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of debt securities contains floor rates |  | 74.80% |  | 74.80% |
Aggregate cost of investments |  | $ 630,191 |  | $ 605,365 |
Aggregate gross unrealized appreciation |  | 33,800 |  | 29,300 |
Aggregate gross unrealized depreciation |  | 37,700 |  | 41,300 |
Net unrealized depreciation |  | $ 3,800 |  | $ (12,000) |
Percentage of qualifying assets to total assets |  | 84.70% |  | 84.20% |
Maximum |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Floor rate |  | 2.00% |  | 2.00% |
Minimum |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Floor rate |  | 0.50% |  | 0.50% |
Investments |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 227.00% | [1] | 194.00% | [2]
Aggregate cost of investments |  | $ 630,191 |  |  |
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% |
Senior Secured Loan |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 165.00% |  | 130.00% |
Aggregate cost of investments |  | $ 426,052 |  | $ 361,556 |
Junior Secured Loan |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value | [3] |  |  | (25.00%) |
Aggregate cost of investments |  | $ 65,672 |  | $ 82,996 |
Percentage of equities of net asset value at fair value |  | 24.00% |  |  |
Senior Unsecured Bond |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  |  |  | 0.00% |
Effective interest |  |  |  | 10.00% |
Aggregate cost of investments |  | $ 416 |  | $ 416 |
Percentage of equities of net asset value at fair value |  | 0.00% |  |  |
Equity Securities |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 10.00% |  | (8.00%) | [3]
Aggregate cost of investments |  | $ 27,679 |  | $ 26,680 |
Investments For Federal Income Tax Purpose |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Aggregate cost of investments |  | $ 627,500 |  | $ 628,600 |
CLO Subordinated Investments |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 10.00% |  | 11.00% | [3]
Asset Manager Affiliates |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 0.00% |  | (0.00%) | [3]
Aggregate cost of investments |  | $ 17,791 |  | $ 17,791 |
Joint Ventures |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 18.00% |  | (22.00%) | [3]
Aggregate cost of investments |  | $ 55,139 |  | $ 64,365 |
Derivatives |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of net asset value at fair value |  | 0.00% |  | (1.00%) | [3]
Aggregate cost of investments |  | $ 31 |  | $ 31 |
Controlled Affiliated Investments |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Aggregate cost of investments |  | $ 58,322 |  | $ 52,130 |
Controlled Affiliated Investments | Minimum |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of outstanding voting securities owned |  | 25.00% |  | 25.00% |
Non-controlled Affiliated Investments |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Aggregate cost of investments |  | $ 61,336 |  | $ 74,082 |
Non-controlled Affiliated Investments | Minimum |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percentage of outstanding voting securities owned |  | 5.00% |  | 5.00% |
[1] | The aggregate cost of investments for federal income tax purposes is approximately $627.5 million. The aggregate gross unrealized appreciation is approximately $33.8 million, the aggregate gross unrealized depreciation is approximately $37.7 million., and the net unrealized depreciation is approximately $3.8 million.
[2] | The aggregate cost of investments for federal income tax purposes is approximately $628.6 million. The aggregate gross unrealized appreciation is approximately $29.3 million, the aggregate gross unrealized depreciation is approximately $41.3 million, and the net unrealized depreciation is approximately $12.0 million.
[3] | The Company's investments are generally acquired in private transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”) and, therefore, are generally subject to limitations on resale, and may be deemed to be “restricted securities'' under the Securities Act of 1933.

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