Quarterly report pursuant to Section 13 or 15(d)

FINANCIAL HIGHLIGHTS (Details)

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FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Investment Company, Financial Highlights [Roll Forward]            
NAV at the beginning of the period (in dollars per share) $ 7.77 $ 7.61        
Net investment income (in dollars per share) 0.36 0.36        
Net realized loss (in dollars per share) (0.02) (0.32)        
Net unrealized appreciation (in dollars per share) 0.07 0.39        
Income tax provision (in dollars per share) (0.05) (0.04)        
Net increase in net assets resulting from operations (in dollars per share) 0.36 0.39        
Dividends paid from net investment income (in dollars per share) (0.37) (0.35)        
Dividends paid or accrued (in dollars per share) (0.37) (0.35)        
Accretive effect of stock repurchase (repurchasing shares below NAV per share) (in dollars per share) 0.01 0.01        
Other (in dollars per share) 0.01 0.01        
NAV at the end of the period (in dollars per share) $ 7.78 $ 7.67        
Shares outstanding at the end of the period (in shares) 80,141,342 80,049,691        
NAV at end of period $ 623,175 $ 613,783 $ 618,521 $ 622,307 $ 608,299 $ 609,665
Average NAV 621,334 610,582        
Average outstanding debt $ 501,259 $ 474,188        
Ratios to average NAV:            
Ratio of total expenses, including income tax provision, to average NAV (as a percent) 7.59% 6.38%        
Ratio of operating expenses to average NAV (as a percent) 6.99% 5.86%        
Ratio of operating expenses excluding interest expense, to average NAV (as a percent) 3.92% 3.04%        
Ratio of operating expenses, excluding interest expense and incentive fees to average NAV (as a percent) 2.76% 2.01%        
Ratio of net investment income to average NAV (as a percent) 4.65% 4.67%        
Portfolio turnover ratio (as a percent) 11.72% 9.95%        
Total return based on change in NAV (as a percent) 4.91% 5.16%        
Expense waivers $ 4,500 $ 4,300        
Investment Company, Ratio To Average Net Assets Excluding Expense Waivers            
Ratio of total expenses, including income tax provision, to average NAV (as a percent) 8.33% 7.10%        
Ratio of operating expenses to average NAV (as a percent) 7.73% 6.57%        
Ratio of operating expenses, excluding interest expense, to average NAV (as a percent) 4.65% 3.75%        
Ratio of operating expenses, excluding interest expense and incentive fees, to average NAV (as a percent) 0.0349 0.0271        
Ratio of net investment income to average NAV (as a percent) 3.94% 3.98%        
Total return based on change in NAV (as a percent) 4.91% 4.46%