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Stockholders' Equity - Summary of Components of Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Beginning balance |  | $ 261,666 |  | $ 278,301 | $ 280,122 | [1] | $ 268,604 |  | $ 219,855 |  | $ 216,264 | [1] | $ 280,122 | [1] | $ 216,264 | [1]
Net investment income |  | 8,392 |  | 5,522 | 7,908 |  | 13,718 |  | 11,710 |  | 8,213 |  | 21,822 | [1] | 33,641 | [1]
Net unrealized gain (loss) on investments |  | (2,968) |  | 113 | 2,143 |  | (642) |  | 1,490 |  | 6,745 |  | (712) | [1] | 7,593 | [1]
Net realized (losses) from investment transactions and extinguishment of debt |  | (9,087) |  | (13,991) | (5,553) |  | (3,931) |  | (2,356) |  | (6,921) |  |  |  |  |
Tax (provision) benefit on realized and unrealized gains (losses) on investments |  | 542 |  | (77) | (440) |  |  |  |  |  |  |  | 1,059 | [1] |  |
Distributions to Stockholders |  | (6,048) |  | (6,064) | (6,111) |  | (5,469) |  | (4,594) |  | (4,510) |  | (18,223) | [1] | (14,573) | [1]
Reinvested Dividends |  | 204 |  | 346 | 338 |  | 215 |  | 165 |  | 64 |  | 888 | [1] | 444 | [1]
Stock repurchases |  |  |  | (2,459) | (545) |  | (1,447) |  | (380) |  |  |  | (3,004) | [1] | (1,827) | [1]
Private placement and other |  | (35) |  | (25) | 439 |  |  |  | 4,019 |  |  |  | 379 | [1] | 42,714 | [1]
Ending balance |  | 251,582 | [1],[2] | 261,666 | 278,301 |  | 271,048 | [1],[2] | 268,604 |  | 219,855 |  | 251,582 | [1],[2] | 271,048 | [1],[2]
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | 97 |  | 97 | 97 |  | 92 | [3] | 75 | [3] | 75 | [3] | 97 |  | 75 | [3]
Private placement and other | [3] |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Ending balance |  | 97 |  | 97 | 97 |  | 92 | [3] | 92 | [3] | 75 | [3] | 97 |  | 92 | [3]
Capital in Excess of Par Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | 731,189 |  | 733,327 | 733,095 |  | 681,682 | [3] | 639,200 | [3] | 639,136 | [3] | 733,095 |  | 639,136 | [3]
Reinvested Dividends |  | 204 |  | 346 | 338 |  | 215 | [3] | 165 | [3] | 64 | [3] |  |  |  |
Stock repurchases |  |  |  | (2,459) | (545) |  | 1,447 | [3] | (380) | [3] |  |  |  |  |  |
Private placement and other |  | (35) |  | (25) | 439 |  |  |  | 4,017 | [3] |  |  |  |  |  |
Ending balance |  | 731,358 |  | 731,189 | 733,327 |  | 680,450 | [3] | 681,682 | [3] | 639,200 | [3] | 731,358 |  | 680,450 | [3]
Total Distributable (Loss) Earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | (469,620) |  | (455,123) | (453,070) |  | (413,170) |  | (419,420) |  | (422,947) |  | (453,070) |  | (422,947) |
Net investment income |  | 8,392 |  | 5,522 | 7,908 |  | 13,718 |  | 11,710 |  | 8,213 |  |  |  |  |
Net unrealized gain (loss) on investments |  | (2,968) |  | 113 | 2,143 |  | (642) |  | 1,490 |  | 6,745 |  |  |  |  |
Net realized (losses) from investment transactions and extinguishment of debt |  | (9,087) |  | (13,991) | (5,553) |  | (3,931) |  | (2,356) |  | (6,921) |  |  |  |  |
Tax (provision) benefit on realized and unrealized gains (losses) on investments |  | 542 |  | (77) | (440) |  |  |  |  |  |  |  |  |  |  |
Distributions to Stockholders |  | (6,048) |  | (6,064) | (6,111) |  | (5,469) |  | (4,594) |  | (4,510) |  |  |  |  |
Ending balance |  | $ (479,873) |  | $ (469,620) | $ (455,123) |  | $ (409,494) |  | (413,170) |  | $ (419,420) |  | $ (479,873) |  | $ (409,494) |
HCAP Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HCAP purchase (net of offering expenses) |  |  |  |  |  |  |  |  | 38,695 |  |  |  |  |  |  |
HCAP Acquisition | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HCAP purchase (net of offering expenses) | [3] |  |  |  |  |  |  |  | 15 |  |  |  |  |  |  |
HCAP Acquisition | Capital in Excess of Par Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HCAP purchase (net of offering expenses) | [3] |  |  |  |  |  |  |  | $ 38,680 |  |  |  |  |  |  |
[1] | Refer to Note 9 "Stockholders' Equity" for additional information on changes in components of Stockholders' Equity
[2] | Totals may not sum due to rounding.
[3] | The Company completed a Reverse Stock Split of 10 to 1 effective August 26, 2021, the common stock and capital in excess of par value have been adjusted retroactively to reflect the split for all periods presented.

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