v3.26.3
ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Defined benefit pension plan, tax benefits $ 300   $ 300     $ 300    
Accumulated other comprehensive loss included in noncontrolling interests (2,332,587) $ (2,279,982) (2,332,587) $ (2,279,982) $ (2,335,385) (2,318,441) $ (2,225,132) $ (2,155,097)
Other nonoperating expense (69) (8) (713) (804)        
Total Members’ Capital                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Unamortized defined benefit pension plan net actuarial losses 1,600   1,600     1,500    
Accumulated other comprehensive loss included in noncontrolling interests (849,662) $ (803,043) (849,662) (803,043) $ (848,995) (843,245) $ (779,392) $ (749,436)
AOCI Attributable to Noncontrolling Interest                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss included in noncontrolling interests $ 700   700     $ 700    
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Other nonoperating expense     $ 3 $ 21