v3.26.1
ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 192,722 $ 172,230
Obligations incurred 6,702 3,834
Accretion expense 7,927 7,316
Obligations settled (2,388) (1,917)
Ending balance $ 204,963 $ 181,463