v3.26.1
CONSOLIDATED FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Per Common Share Data:      
Net asset value per common share, beginning of year (in dollars per share) $ 16.26 $ 16.80 $ 16.80
Net investment income (loss) (in dollars per share) 0.36 0.40  
Net realized gain (loss) and net change in unrealized appreciation (depreciation) on investments, non-investment assets and liabilities, and forward currency contracts (in dollars per share) (0.42) (0.15)  
Net increase (decrease) in net assets resulting from operations (in dollars per share) (0.06) 0.25  
Dividends declared (in dollars per share) (0.40) (0.45)  
Accretion due to issuance of common stock (in dollars per share) 0 0.03  
Accretion due to share repurchases (in dollars per share) 0.09 0  
Net asset value per common share, end of year (in dollars per share) 15.89 16.63 $ 16.26
Market price per common share, end of year (in dollars per share) $ 10.94 $ 16.18  
Number of common shares outstanding, end of period 70,270,936 72,902,981 71,807,190
Total return based on net asset value 0.76% 1.40%  
Total return based on market price (9.69%) (7.56%)  
Net assets attributable to Common Stockholders, end of period $ 1,116,561 $ 1,212,389  
Ratio to average net assets attributable to Common Stockholders:      
Expenses before incentive fees 2.94% 2.79%  
Expenses after incentive fees 3.40% 3.21%  
Net investment income (loss) 2.21% 2.09%  
Interest expense and credit facility fees 1.91% 1.80%  
Ratios/Supplemental Data:      
Asset coverage, end of period 180.02% 196.28% 175.60%
Portfolio turnover 9.94% 16.45%  
Weighted-average shares outstanding (in shares) 70,907,909 51,923,228