Annual report pursuant to Section 13 and 15(d)

FINANCIAL HIGHLIGHTS (Details)

v3.24.0.1
FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Investment Company, Financial Highlights [Roll Forward]          
NAV at the beginning of the period (in dollars per share) $ 7.61 $ 7.68 $ 7.28 $ 7.77 $ 7.96
Net investment income (in dollars per share) 0.72 0.66 0.67 0.59 0.71
Net realized loss (in dollars per share) (0.42) (0.05) (0.04) (0.66) (0.23)
Net unrealized appreciation (depreciation) (in dollars per share) 0.58 (0.02) 0.31 (0.03) 0.04
Income tax provision (in dollars per share) (0.05) (0.02) (0.02) (0.02) (0.01)
Net increase (decrease) in net assets resulting from operations (in dollars per share) 0.83 0.57 0.92 (0.12) 0.51
Dividends paid from net investment income (in dollars per share) (0.70) (0.65) (0.53) (0.35) (0.68)
Dividends from capital gains (in dollars per share) 0 0 0 0 (0.02)
Dividends paid or accrued (in dollars per share) (0.70) (0.65) (0.53) (0.35) (0.70)
Accretive effect of stock repurchases (repurchasing shares below NAV) (in dollars per share) 0.03 0 0 0 0
Other (in dollars per share) 0 0.01 0.01 (0.02) 0
NAV at the end of the period (in dollars per share) $ 7.77 $ 7.61 $ 7.68 $ 7.28 $ 7.77
Shares outstanding at the end of the period (in shares) 80,108,865 80,105,999 79,826,605 79,608,304 78,463,377
NAV at end of period $ 622,307 $ 609,665 $ 613,170 $ 579,624 $ 609,305
Average NAV 613,525 611,214 593,440 557,382 622,708
Average outstanding debt $ 487,271 $ 494,957 $ 321,973 $ 386,084 $ 474,000
Investment Company, Ratio To Average Net Assets [Abstract]          
Ratio of total expenses, including income tax expense, to average NAV 12.63% 8.60% 6.51% 7.38% 9.11%
Ratio of operating expenses to average NAV 12.02% 8.33% 6.20% 7.16% 9.11%
Ratio of operating expenses excluding interest expense, to average NAV 6.07% 4.33% 3.76% 4.07% 4.86%
Ratio of operating expenses, excluding interest expense and incentive fees to average NAV 4.02% 3.98% 3.66% 4.07% 4.22%
Ratio of net investment income to average NAV 9.40% 8.65% 8.99% 8.40% 8.84%
Portfolio turnover ratio 21.82% 18.92% 35.39% 8.93% 33.30%
Total return based on change in NAV 10.86% 7.43% 12.71% (1.80%) 6.41%
Expense waivers $ 8,300 $ 4,500 $ 4,300 $ 3,600 $ 3,100
Investment Company, Ratio To Average Net Assets Excluding Expense Waivers [Abstract]          
Ratio of total expenses, including income tax expense, to average NAV 13.98% 9.33% 7.24% 8.11% 9.84%
Ratio of operating expenses to average NAV 13.37% 9.06% 6.92% 7.89% 9.84%
Ratio of operating expenses, excluding interest expense, to average NAV 7.43% 5.07% 4.49% 4.80% 5.58%
Ratio of operating expenses, excluding interest expense and incentive fees, to average NAV 0.0538 0.0472 0.0439 0.0480 0.0495
Ratio of net investment income to average NAV 8.05% 7.90% 8.26% 7.67% 8.11%
Total return based on change in NAV 9.50% 6.69% 11.98% (2.20%) 5.85%