v3.26.1
Financial Highlights - Schedule of Financial Highlights (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Per Share Data:        
Net asset value, beginning of year $ 18.26 $ 18.2    
Net investment income 0.33 0.41    
Net realized and unrealized gain (loss) (0.02) (0.04)    
Net increase in net assets resulting from operations 0.31 0.37    
From distributable earnings (0.33) (0.41)    
From return of capital (0.08) 0    
Net asset value, end of period 18.16 18.16    
Per share market value, end of period $ 14.31 $ 16.86 $ 15.46 $ 16.16
Total Return 0.79% 6.82%    
Net assets, end of period $ 990,750 $ 990,485 $ 995,993 $ 992,926
Shares outstanding, end of period 54,554,634 54,554,634 54,554,634  
Ratios to average net assets:        
Net investment income 1.79% 2.23%    
Operating expenses 1.51% 1.53%    
Interest and other credit facility expenses 1.65% 1.60%    
Total expenses 3.16% 3.13%    
Average debt outstanding $ 1,117,287 $ 1,010,398    
Portfolio turnover ratio 5.60% 9.70%