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Income Taxes - Schedule of Reconciliation Taxable Income and Total Distributions Declared to Common Stockholders (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net increase in net assets resulting from operations | $ 4,723 | $ 11,428 | $ 7,981 | $ 11,690 | $ 50,238 | $ 28,442 | $ 25,886 | $ 11,538 | $ 29,517 | $ 20,707 | $ 7,973 | $ (26,971) | $ 35,822 | $ 116,104 | $ 31,226
Net change in unrealized (appreciation) depreciation on investments |  |  |  |  |  |  |  |  |  |  |  |  | 65,702 | (41,496) | 6,578
Permanent book income and tax income differences |  |  |  |  |  |  |  |  |  |  |  |  | 12,606 | 2,176 | 1,810
Temporary book income and tax income differences |  |  |  |  |  |  |  |  |  |  |  |  | (18,210) | 347 | (5,091)
Capital loss carry forward (utilization) |  |  |  |  |  |  |  |  |  |  |  |  |  | (25,024) | 3,385
Taxable income |  |  |  |  |  |  |  |  |  |  |  |  | 95,920 | 52,107 | 37,908
Taxable income earned in prior year and carried forward for distribution in current year |  |  |  |  |  |  |  |  |  |  |  |  | 33,839 | 20,832 | 15,432
Taxable Subsidiaries liquidating distributions |  |  |  |  |  |  |  |  |  |  |  |  | 138 |  |
Deemed distribution of long term capital gains |  |  |  |  |  |  |  |  |  |  |  |  | (40,801) |  |
Taxable income earned in current period and carried forward for distribution in following year |  |  |  |  |  |  |  |  |  |  |  |  | (40,044) | (33,839) | (20,832)
Total distributions to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  | $ 49,052 | $ 39,100 | $ 32,508

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