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CLOSURE AND POST-CLOSURE LIABILITIES (Tables)
 3 Months Ended
Mar. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Closure and Post-Closure Liabilities
The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2023 through March 31, 2023 were as follows (in thousands):
Landfill
Retirement
Liability		Non-Landfill
Retirement
Liability		Total
Balance at January 1, 2023$62,251 $56,550 $118,801 
Measurement period adjustments from prior period acquisitions— 3,015 3,015 
New asset retirement obligations641 — 641 
Accretion1,286 1,056 2,342 
Changes in estimates recorded to consolidated statement of operations— 24 24 
Changes in estimates recorded to consolidated balance sheet— 1,437 1,437 
Expenditures(3,187)(1,472)(4,659)
Currency translation and other7 3 10 
Balance at March 31, 2023$60,998 $60,613 $121,611