Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Investment Company, Financial Highlights [Roll Forward] | ||||||||||||
| Net asset value, beginning balance (in dollars per share) | $ 13.76 | $ 15.43 | $ 15.43 | |||||||||
| Net investment income (in dollars per share) | $ 0.25 | $ 0.74 | 0.79 | 1.42 | 1.78 | |||||||
| Net realized loss and net change in unrealized depreciation on investments and loss on foreign currency (in dollars per share) | (0.69) | (1.02) | (2.18) | |||||||||
| Net increase (decrease) in net assets resulting from operations (in dollars per share) | 0.10 | 0.40 | (0.40) | |||||||||
| Shareholder distributions: | ||||||||||||
| Distributions declared to stockholders from net investment income (in dollars per share) | (0.90) | (1.08) | (1.44) | |||||||||
| Capital share transactions: | ||||||||||||
| Repurchases of common stock below net asset value (in dollars per share) | 0.24 | 0.11 | 0.17 | |||||||||
| Net increase in net assets resulting from capital share transactions (in dollars per share) | 0.24 | 0.11 | 0.17 | |||||||||
| Net asset value, ending balance (in dollars per share) | $ 13.20 | $ 14.86 | $ 13.20 | $ 14.86 | $ 13.76 | |||||||
| Shares of common stock outstanding at end of period (in shares) | 49,202,704 | 51,973,518 | 49,202,704 | 51,973,518 | 51,417,866 | |||||||
| Total investment return-net asset value | 8.55% | 7.72% | 3.29% | |||||||||
| Total investment return-market value | (17.85%) | (7.01%) | (1.75%) | |||||||||
| Net assets at beginning of period | $ 707,628 | [1] | $ 820,810 | $ 820,810 | ||||||||
| Net assets at end of period | $ 649,465 | [2] | $ 772,506 | 649,465 | [2] | 772,506 | 707,628 | [1] | ||||
| Average net assets | $ 669,686 | $ 781,756 | $ 775,218 | |||||||||
| Ratio/Supplemental data: | ||||||||||||
| Ratio of net investment income to average net assets | 7.86% | 12.78% | 12.00% | |||||||||
| Ratio of net operating expenses to average net assets | 21.62% | 19.20% | 19.06% | |||||||||
| Portfolio turnover rate | 13.08% | 10.43% | 14.92% | |||||||||
| Total amount of senior securities outstanding | $ 897,000 | $ 1,092,344 | $ 1,139,844 | |||||||||
| Asset coverage ratio | 172.00% | 171.00% | 172.00% | 171.00% | 162.00% | |||||||
| Number of shares (in shares) | 1 | 1 | ||||||||||
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