Common Stock - Schedule of Stockholders Equity Activity (Details) - USD ($) |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
May 08, 2026 |
May 09, 2025 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||||||
| Beginning balance (in shares) | 135,487,319 | 135,487,319 | |||||||
| Net assets at beginning of period attributable to common stock | $ 1,831,650,000 | $ 1,840,070,000 | $ 1,898,833,000 | $ 1,910,377,000 | $ 1,840,070,000 | $ 1,910,377,000 | $ 1,910,377,000 | ||
| Net investment income (loss) | 33,233,000 | 36,549,000 | 39,580,000 | 44,924,000 | 69,782,000 | 84,504,000 | |||
| Net realized gain (loss) from investment transactions | (1,239,000) | (32,817,000) | (11,492,000) | 3,452,000 | (34,056,000) | (8,040,000) | |||
| Net change in unrealized appreciation (depreciation) on investments | (5,466,000) | 14,739,000 | (1,930,000) | (23,517,000) | 9,273,000 | (25,447,000) | |||
| Accretion to redemption value of Series A redeemable convertible preferred stock | (4,000) | (5,000) | (4,000) | (5,000) | |||||
| Accrual of Series A redeemable convertible preferred stock distributions | (1,226,000) | (1,226,000) | (1,687,000) | (1,686,000) | |||||
| Distributions to common stockholders | (32,035,000) | (32,517,000) | (44,942,000) | (44,703,000) | (64,553,000) | (89,645,000) | |||
| Reinvested dividends | (2,000) | 6,857,000 | 9,292,000 | 9,991,000 | $ 6,856,000 | 19,283,000 | |||
| Repurchases (in shares) | (2,499,996) | (2,475,427,000) | (2,499,996) | (2,568,807) | |||||
| Repurchases | $ (33,949,950) | $ (34,903,490) | $ (33,950,000) | $ (34,903,000) | $ (33,950,000) | $ (34,903,000) | $ (36,219,000) | ||
| Ending balance (in shares) | 133,482,448 | 134,387,297 | 133,482,448 | 134,387,297 | 135,487,319 | ||||
| Net assets at end of period attributable to common stock | $ 1,790,961,000 | $ 1,831,650,000 | $ 1,852,747,000 | $ 1,898,833,000 | $ 1,790,961,000 | $ 1,852,747,000 | $ 1,840,070,000 | ||
| Common Stock | |||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||||||
| Beginning balance (in shares) | 135,982,568 | 135,487,319 | 136,196,142 | 135,487,595 | 135,487,319 | 135,487,595 | 135,487,595 | ||
| Net assets at beginning of period attributable to common stock | $ 136,000 | $ 135,000 | $ 136,000 | $ 135,000 | $ 135,000 | $ 135,000 | $ 135,000 | ||
| Reinvested dividends (in shares) | (124) | 495,249 | 666,581 | 708,547 | |||||
| Reinvested dividends | $ 1,000 | $ 1,000 | $ 1,000 | ||||||
| Repurchases (in shares) | (2,499,996) | (2,475,426) | |||||||
| Repurchases | $ (3,000) | $ (2,000) | |||||||
| Ending balance (in shares) | 133,482,448 | 135,982,568 | 134,387,297 | 136,196,142 | 133,482,448 | 134,387,297 | 135,487,319 | ||
| Net assets at end of period attributable to common stock | $ 133,000 | $ 136,000 | $ 135,000 | $ 136,000 | $ 133,000 | $ 135,000 | $ 135,000 | ||
| Additional paid in capital | |||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||||||
| Net assets at beginning of period attributable to common stock | 2,537,839,000 | 2,530,983,000 | 2,527,880,000 | 2,517,890,000 | 2,530,983,000 | 2,517,890,000 | 2,517,890,000 | ||
| Reinvested dividends | (2,000) | 6,856,000 | 9,291,000 | 9,990,000 | |||||
| Repurchases | (33,947,000) | (34,901,000) | |||||||
| Net assets at end of period attributable to common stock | 2,503,890,000 | 2,537,839,000 | 2,502,270,000 | 2,527,880,000 | 2,503,890,000 | 2,502,270,000 | 2,530,983,000 | ||
| Total distributable earnings (loss) | |||||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||||||
| Net assets at beginning of period attributable to common stock | (706,325,000) | (691,048,000) | (629,183,000) | (607,648,000) | (691,048,000) | (607,648,000) | (607,648,000) | ||
| Net investment income (loss) | 33,233,000 | 36,549,000 | 39,580,000 | 44,924,000 | |||||
| Net realized gain (loss) from investment transactions | (1,239,000) | (32,817,000) | (11,492,000) | 3,452,000 | |||||
| Net change in unrealized appreciation (depreciation) on investments | (5,466,000) | 14,739,000 | (1,930,000) | (23,517,000) | |||||
| Accretion to redemption value of Series A redeemable convertible preferred stock | (4,000) | (5,000) | (4,000) | (5,000) | |||||
| Accrual of Series A redeemable convertible preferred stock distributions | (1,226,000) | (1,226,000) | (1,687,000) | (1,686,000) | |||||
| Distributions to common stockholders | (32,035,000) | (32,517,000) | (44,942,000) | (44,703,000) | |||||
| Net assets at end of period attributable to common stock | $ (713,062,000) | $ (706,325,000) | $ (649,658,000) | $ (629,183,000) | $ (713,062,000) | $ (649,658,000) | $ (691,048,000) | ||