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FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 82,533 $ 71,927
Obligations incurred 5,408 3,840
Revisions in estimates (836) 4,531
Accretion expense 6,775 6,436
Obligations settled (6,966) (4,201)
Ending balance $ 86,914 $ 82,533