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ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE (Tables)
9 Months Ended
Sep. 30, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Schedule 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,
 20242023
Beginning balance$133,904 $113,678 
Obligations incurred5,230 4,023 
Revision in estimates (1)
8,477 — 
Accretion expense 8,569 7,193 
Obligations settled (2)
(6,545)(7,338)
Ending balance$149,635 $117,556 
(1)Relates to the revision in estimates of the post-closure liability for the Town of Southbridge, Massachusetts landfill (“Southbridge Landfill”). See Note 11, Other Items and Charges for further disclosure.
(2)May include amounts that are being processed through accounts payable as a part of our disbursements cycle.