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ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE (Tables)
9 Months Ended
Sep. 30, 2023
Asset Retirement Obligation Disclosure [Abstract]  
Summary of Changes to Accrued Capping, Closure and Post-Closure Liabilities
A summary of the changes to accrued final capping, closure and post-closure liabilities follows:
 Nine Months Ended
September 30,
 20232022
Beginning balance$113,678 $86,914 
Obligations incurred4,023 3,592 
Revision in estimates (1)
— 1,443 
Accretion expense 7,193 5,685 
Obligations settled (2)
(7,338)(3,027)
Ending balance$117,556 $94,607 
(1)Relates to a change in estimates concerning anticipated capping costs at one of our landfills.
(2)May include amounts that are being processed through accounts payable as a part of our disbursements cycle.