Quarterly report pursuant to Section 13 or 15(d)

FINANCIAL HIGHLIGHTS (Details)

v3.23.3
FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Investment Company, Financial Highlights [Roll Forward]                
NAV at the beginning of the period (in dollars per share) $ 7.61 $ 7.68            
Net investment income (in dollars per share) 0.53 0.48            
Net realized gain (loss) (in dollars per share) (0.31) 0.10            
Net unrealized appreciation (depreciation) (in dollars per share) 0.38 (0.14)            
Income tax provision (in dollars per share) (0.04) (0.02)            
Net increase in net assets resulting from operations (in dollars per share) 0.56 0.42            
Dividends paid from net investment income (in dollars per share) (0.53) (0.40)            
Dividends from capital gains (in dollars per share) 0 (0.08)            
Dividends paid or accrued (in dollars per share) (0.53) (0.48)            
Accretive effect of stock repurchases (repurchasing shares below NAV) (in dollars per share) 0.02 0            
Other (in dollars per share) 0.01 0            
NAV at the end of the period (in dollars per share) $ 7.67 $ 7.62            
Shares outstanding at the end of the period (in shares) 80,013,948 80,059,079            
NAV at end of period $ 613,569 $ 609,748 $ 613,783 $ 608,299 $ 609,665 $ 606,859 $ 616,627 $ 613,170
Average NAV 611,329 611,601            
Average outstanding debt $ 482,021 $ 497,038            
Investment Company, Ratio To Average Net Assets [Abstract]                
Ratio of total expenses, including income tax expense, to average NAV 9.35% 6.03%            
Ratio of operating expenses to average NAV 8.83% 5.73%            
Ratio of operating expenses excluding interest expense, to average NAV 4.48% 3.01%            
Ratio of operating expenses, excluding interest expense and incentive fees to average NAV 3.03% 3.01%            
Ratio of net investment income to average NAV 6.97% 6.34%            
Portfolio turnover ratio 12.32% 14.13%            
Total return based on change in NAV 7.36% 5.43%            
Expense waivers $ 6,300 $ 3,400            
Investment Company, Ratio To Average Net Assets Excluding Expense Waivers [Abstract]                
Ratio of total expenses, including income tax expense, to average NAV 10.39% 6.58%            
Ratio of operating expenses to average NAV 9.87% 6.28%            
Ratio of operating expenses, excluding interest expense, to average NAV 5.52% 3.56%            
Ratio of operating expenses, excluding interest expense and incentive fees, to average NAV 0.0406 0.0356            
Ratio of net investment income to average NAV 5.95% 5.77%            
Total return based on change in NAV 6.33% 4.87%