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Investments - Schedule of Realized Gains and Losses and Changes in Unrealized Appreciation and Depreciation on Control and Affiliate investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | $ 3,568,539 |  | $ 3,568,539 |  | $ 3,248,046 |
Interest & Dividend Income | 117,529 | $ 108,986 | 233,308 | $ 208,883 |  |
Fee Income | 7,477 | 7,245 | 13,251 | 12,438 |  |
Net Change in Unrealized Appreciation (Depreciation) | (34,722) | 18,858 | (31,088) | 39,963 |  |
Control investments |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | 111,259 | 90,923 | 111,259 | 90,923 | $ 115,004 | $ 76,458
Interest & Dividend Income | 3,457 | 1,055 | 6,414 | 2,171 |  |
Fee Income | 36 | 19 | 72 | 38 |  |
Net Change in Unrealized Appreciation (Depreciation) | (1,506) | 4,573 | (4,335) | 13,419 |  |
Realized Gain (Loss) | 0 | 0 | 0 | 0 |  |
Control investments | Coronado Aesthetics, LLC |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | 186 | 297 | 186 | 297 |  |
Interest & Dividend Income | 0 | 0 | 0 | 0 |  |
Fee Income | 0 | 0 | 0 | 0 |  |
Net Change in Unrealized Appreciation (Depreciation) | (97) | 41 | (76) | (22) |  |
Realized Gain (Loss) | 0 | 0 | 0 | 0 |  |
Control investments | Gibraltar Business Capital, LLC |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | 56,811 | 44,392 | 56,811 | 44,392 |  |
Interest & Dividend Income | 1,534 | 731 | 2,567 | 1,527 |  |
Fee Income | 36 | 19 | 72 | 38 |  |
Net Change in Unrealized Appreciation (Depreciation) | (1,670) | 2,667 | (6,291) | 6,402 |  |
Realized Gain (Loss) | 0 | 0 | 0 | 0 |  |
Control investments | Hercules Adviser LLC |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | 42,728 | 39,161 | 42,728 | 39,161 |  |
Interest & Dividend Income | 1,751 | 152 | 3,503 | 302 |  |
Fee Income | 0 | 0 | 0 | 0 |  |
Net Change in Unrealized Appreciation (Depreciation) | 844 | 2,566 | 2,015 | 8,008 |  |
Realized Gain (Loss) | 0 | 0 | 0 | 0 |  |
Control investments | Tectura Corporation |  |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |  |
Fair value | 11,534 | 7,073 | 11,534 | 7,073 |  |
Interest & Dividend Income | 172 | 172 | 344 | 342 |  |
Fee Income | 0 | 0 | 0 | 0 |  |
Net Change in Unrealized Appreciation (Depreciation) | (583) | (701) | 17 | (969) |  |
Realized Gain (Loss) | $ 0 | $ 0 | $ 0 | $ 0 |  |

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