v3.25.2
Financial Highlights - Schedule of Net Asset Value Per Unit and Reflects all Units Issued and Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Investment Company [Abstract]            
Net Asset Value Per Unit (accrual base), Beginning of Period $ 50.49 $ 53.53        
Income from Investment Operations:            
Net investment income 5.12 6.18        
Net realized and unrealized loss (8.34) (4.4)        
Total (loss) income from investment operations (3.22) 1.78        
Less Distributions:            
From distributable earnings 0 (0.36)        
Total distributions 0 (0.36)        
Net Asset Value Per Unit (accrual base), End of Period $ 47.27 $ 54.95        
Unitholder Total Return (6.16%) 3.39%        
Unitholder IRR before incentive fees 7.80% 9.94%        
Unitholder IRR after all fees and expenses 7.80% 9.00%        
Ratios and Supplemental Data            
Member's Capital, end of period $ 483,738 $ 589,282 $ 512,804 $ 528,008 $ 576,756 $ 569,767
Units outstanding, end of period 13,734,010 13,734,010        
Ratios based on average net assets of Members’ Capital:            
Ratio of total expenses before incentive fees to average net assets 7.69% 7.41%        
Ratio of financing cost to average net assets 1.90% 2.15%        
Ratio of net investment income to average net assets 27.29% 29.46%        
Ratio of incentive fees to average net assets (13.85%) (12.62%)        
Credit facility payable $ 213,500 $ 222,628        
Asset coverage ratio 3.27% 3.65%        
Portfolio turnover rate 6.42% 6.04%