v3.26.1
MEMBERS' CAPITAL - Unit Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Equity [Abstract]                
Percent of unit authorized to be purchased each quarter 5.00%       5.00%   5.00%  
Percentage of Outstanding Units the Company Offered to Repurchase 5.00% [1] 5.00% [1] 5.00% [2] 5.00% [2] 5.00% [1] 5.00% [2] 5.00% [1] 5.00% [2]
Price Paid Per Unit (in dollars per share) $ 19.71 $ 19.83 $ 20.21 $ 20.18        
Amount Repurchased $ 15,242 $ 14,819 $ 1,247 $ 5,024 $ 15,242 $ 1,247 $ 30,061 $ 6,271
Number of Units Repurchased (in units) 773,337 747,294 61,693 248,972     1,520,631 310,665
Percentage of Outstanding Units Repurchased 5.00% [1] 5.00% [1] 0.56% [2] 2.83% [2] 5.00% [1] 0.56% [2] 5.00% [1] 0.56% [2]
Maximum number of units that may yet be purchased under the repurchase program (in units) [3]     0 0   0   0
[1] Percentage is based on total units as of the close of the previous calendar quarter.
[2] Percentage is based on total units as of the close of the previous calendar quarter.
[3] All repurchase requests were satisfied in full.