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CLOSURE AND POST-CLOSURE LIABILITIES
 9 Months Ended
Sep. 30, 2022
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, 2022 through September 30, 2022 were as follows (in thousands):
Landfill
Retirement
Liability		Non-Landfill
Retirement
Liability		Total
Balance at January 1, 2022$53,425 $45,678 $99,103 
Liabilities assumed in acquisitions— 55 55 
Measurement period adjustments from prior period acquisitions— 1,148 1,148 
New asset retirement obligations2,681 — 2,681 
Accretion3,409 3,027 6,436 
Changes in estimates recorded to consolidated statement of operations566 233 799 
Changes in estimates recorded to consolidated balance sheet— 583 583 
Expenditures(2,424)(889)(3,313)
Currency translation and other(522)(198)(720)
Balance at September 30, 2022$57,135 $49,637 $106,772 
In the nine months ended September 30, 2022, there were no significant charges or benefits resulting from changes in estimates for closure and post-closure liabilities.
New asset retirement obligations incurred during the first nine months of 2022 were discounted at the credit-adjusted risk-free rate of 5.37%.