v3.26.1
Financial Highlights - Schedule of Financial Highlights of the Company (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Per Share Data:                
NAV, beginning of period [1]   $ 68.62   $ 68.62 $ 79.27      
Net investment income $ 1.81   $ 2.04 3.49 [1] 4.14 [1]      
Net realized and unrealized gains (losses) [1],[2]       (2.51) (0.59)      
(Provision) benefit for taxes on realized and unrealized gains (losses) on investments [1]         (0.03)      
Net increase in Members' Capital from operations [1],[2]       0.98 3.52      
From net investment income [1]         (2.37)      
From return of capital [1]       (2.72)        
Total distributions recorded [1]       (2.72) (2.37)      
Total increase (decrease) in Members' Capital [1]       (1.74) 1.15      
NAV, end of period [1] $ 66.88   $ 80.42 $ 66.88 $ 80.42      
Units outstanding, end of period [1] 13,854,750   13,854,750 13,854,750 13,854,750      
Weighted average units outstanding, Basic 13,854,750   13,854,750 13,854,750 [1] 13,854,750 [1]      
Weighted average units outstanding, Diluted 13,854,750 13,854,750 [1] 13,854,750 13,854,750 13,854,750 [1]      
Total return based on NAV [1],[3]       1.43% 4.44%      
Supplemental Data/Ratio:                
Members' Capital, end of period $ 926,560 [4] $ 949,377 $ 1,114,256 [4] $ 926,560 [4] $ 1,114,256 [4] $ 950,692 $ 1,123,159 $ 1,098,329
Ratio of expenses (without incentive fees and interest and other debt expenses) to average Members' Capital [4]       1.99% 1.88%      
Ratio of interest and other debt expenses to average Members' Capital [4]       4.10% 5.89%      
Ratio of incentive fees to average Members' Capital [4]       0.25% 0.77%      
Ratio of total expenses to average Members' Capital [4]       6.34% 8.54%      
Ratio of net investment income to average Members' Capital [4]       10.60% 11.15%      
Portfolio turnover [4]       1.00% 3.00%      
[1] The per Unit data was derived by using the weighted average Units outstanding during the applicable period, except for distributions recorded, which reflects the actual amount of distributions recorded per Unit for the applicable period.
[2] The amount shown may not correspond for the period as it includes the effect of the timing of capital drawdowns and distributions.
[3] Calculated as the change in NAV per Unit during the period plus dividends recorded per Unit, divided by the beginning NAV per Unit.
[4] Ratios are annualized, except for, as applicable, unvested Incentive Fees.