v3.26.1
CONSOLIDATED FINANCIAL HIGHLIGHTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Investment Company, Financial Highlights [Roll Forward]                
Net asset value, beginning of period (in dollars per unit)     $ 18.24 $ 18.94        
Net investment income (loss) (in dollars per unit)     0.96 1.04        
Net unrealized and realized gain (loss) (in dollars per unit)     (0.63) (0.32)        
Net increase (decrease) in net assets resulting from operations (in dollars per unit)     0.33 0.72        
Dividends declared (in dollars per unit) $ (0.47) $ (0.51) (0.94) (1.05)        
Total increase (decrease) in net assets (in dollars per unit)     (0.61) (0.33)        
Net asset value, end of period (in dollars per unit) $ 17.63 $ 18.61 $ 17.63 $ 18.61        
Units outstanding, end of period (in units) 66,592,630 58,380,644 66,592,630 58,380,644   61,623,231    
Weighted average units outstanding - basic (in units) 66,499,132 58,344,941 64,896,931 57,507,068        
Weighted average units outstanding - diluted (in units) 66,499,132 58,344,941 64,896,931 57,507,068        
Total return based on net asset value     1.85% 3.86%        
Ratio/Supplemental Data:                
Members' Capital, end of period $ 1,174,202 $ 1,086,546 $ 1,174,202 $ 1,086,546 $ 1,157,117 $ 1,123,707 $ 1,064,636 $ 1,041,965
Ratio of total expenses to average Members' Capital     7.08% 8.40%        
Ratio of net investment income to average Members' Capital     11.09% 11.54%        
Ratio of total contributed capital to total committed capital, end of period     87.50% 84.50%        
Asset coverage ratio 210.00% 207.00% 210.00% 207.00%        
Portfolio turnover rate     8.34% 5.81%