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CLOSURE AND POST-CLOSURE LIABILITIES
 9 Months Ended
Sep. 30, 2025
Asset Retirement Obligation Disclosure [Abstract]  
CLOSURE AND POST-CLOSURE LIABILITIES CLOSURE AND POST-CLOSURE LIABILITIES
The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2025 through September 30, 2025 were as follows (in thousands):
Landfill
Retirement
Liability		Non-Landfill
Retirement
Liability		Total
Balance at January 1, 2025$59,400 $70,388 $129,788 
Measurement period adjustments from prior period acquisitions— 420 420 
New asset retirement obligations2,838 — 2,838 
Accretion3,739 4,112 7,851 
Changes in estimates recorded to consolidated statement of operations467 377 844 
Changes in estimates recorded to consolidated balance sheet— 890 890 
Expenditures(2,496)(970)(3,466)
Currency translation and other123 54 177 
Balance at September 30, 2025$64,071 $75,271 $139,342 
In the nine months ended September 30, 2025, there were no significant benefits or charges resulting from changes in estimates for closure and post-closure liabilities.