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ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE - Summary of Changes to Accrued Capping, Closure and Post-Closure Liabilities (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 86,914 $ 82,533
Obligations incurred 966 1,038
Accretion expense 1,873 1,811
Obligations settled (926) (357)
Ending balance $ 88,827 $ 85,025