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Stockholders' Equity - Summary of Components of Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Beginning balance | $ 215,013 |  | $ 225,106 | $ 232,123 | [1] | $ 261,666 |  | $ 278,301 | $ 280,122 | [1] | $ 232,123 | [1] | $ 280,122 | [1]
Net investment income | 7,166 |  | 7,915 | 8,529 |  | 8,392 |  | 5,522 | 7,908 |  |  |  |  |
Net change in unrealized appreciation on investments | 1,708 |  | (4,176) | (5,960) |  | (2,968) |  | 113 | 2,143 |  | (8,428) |  | (712) |
Net realized (losses) from investment transactions and extinguishment of debt | (1,693) |  | (6,689) | (3,085) |  | (9,087) |  | (13,991) | (5,553) |  |  |  |  |
Tax (provision) benefit on realized and unrealized gains (losses) on investments | 264 |  | (164) | 571 |  | (542) |  | (77) | (440) |  | 671 | [1] | (1,059) | [1]
Distributions to Stockholders | (6,554) |  | (6,579) | (6,495) |  | (6,048) |  | (6,064) | (6,111) |  | (19,628) | [1] | (18,223) | [1]
Reinvested Dividends | 73 |  | 153 | 215 |  | 204 |  | 346 | 338 |  | 440 | [1] | 888 | [1]
Stock repurchases | (1,222) |  | (553) | (792) |  |  |  | (2,459) | (545) |  | (2,566) | [1] | (3,004) | [1]
Private placement and other |  |  |  |  |  | (35) |  | (25) |  |  |  |  | 379 | [1]
Ending balance | 214,755 | [1],[2] | 215,013 | 225,106 |  | 251,582 | [1],[2] | 261,666 | 278,301 |  | 214,755 | [1],[2] | 251,582 | [1],[2]
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | 95 |  | 96 | 96 |  | 97 |  | 97 | 97 |  | 96 |  | 97 |
Stock repurchases |  |  | (1) |  |  |  |  |  |  |  |  |  |  |
Ending balance | 95 |  | 95 | 96 |  | 97 |  | 97 | 97 |  | 95 |  | 97 |
Capital in Excess of Par Value |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | 735,808 |  | 736,207 | 736,784 |  | 731,189 |  | 733,327 | 733,095 |  | 736,784 |  | 733,095 |
Reinvested Dividends | 73 |  | 153 | 215 |  | 204 |  | 346 | 338 |  |  |  |  |
Stock repurchases | (1,222) |  | (552) | (792) |  |  |  | (2,459) | (545) |  |  |  |  |
Private placement and other |  |  |  |  |  | (35) |  | (25) |  |  |  |  |  |
Ending balance | 734,659 |  | 735,808 | 736,207 |  | 731,358 |  | 731,189 | 733,327 |  | 734,659 |  | 731,358 |
Total Distributable (Loss) Earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | (520,890) |  | (511,197) | (504,757) |  | (469,620) |  | (455,123) | (453,070) |  | (504,757) |  | (453,070) |
Net investment income | 7,166 |  | 7,915 | 8,529 |  | 8,392 |  | 5,522 | 7,908 |  |  |  |  |
Net change in unrealized appreciation on investments | 1,708 |  | (4,176) | (5,960) |  | (2,968) |  | 113 | 2,143 |  |  |  |  |
Net realized (losses) from investment transactions and extinguishment of debt | (1,693) |  | (6,689) | (3,085) |  | (9,087) |  | (13,991) | (5,553) |  |  |  |  |
Tax (provision) benefit on realized and unrealized gains (losses) on investments | 264 |  | (164) | 571 |  | (542) |  | (77) | (440) |  |  |  |  |
Distributions to Stockholders | (6,554) |  | (6,579) | (6,495) |  | (6,048) |  | (6,064) | (6,111) |  |  |  |  |
Ending balance | $ (519,999) |  | $ (520,890) | $ (511,197) |  | $ (479,873) |  | $ (469,620) | (455,123) |  | $ (519,999) |  | $ (479,873) |
HCAP Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private placement and other |  |  |  |  |  |  |  |  | 439 |  |  |  |  |
HCAP Acquisition | Capital in Excess of Par Value |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private placement and other |  |  |  |  |  |  |  |  | $ 439 |  |  |  |  |
[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.

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