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CLOSURE AND POST-CLOSURE LIABILITIES
 6 Months Ended
Jun. 30, 2020
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, 2020 through June 30, 2020 were as follows (in thousands):
Landfill
Retirement
Liability		Non-Landfill
Retirement
Liability		Total
Balance at January 1, 2020$39,401  $36,250  $75,651  
Liabilities assumed in acquisitions—  265  265  
New asset retirement obligations1,080  —  1,080  
Accretion1,521  1,655  3,176  
Changes in estimates recorded to statement of operations4,503  (36) 4,467  
Changes in estimates recorded to balance sheet129  (53) 76  
Expenditures(1,254) (491) (1,745) 
Currency translation and other(249) (80) (329) 
Balance at June 30, 2020$45,131  $37,510  $82,641  
During the first six months of 2020, the Company has taken actions to begin the closure of one of its commercial landfill sites resulting in a $4.5 million increase to the related closure and post-closure liability. The remaining ten landfill facilities remain active as of June 30, 2020. In the six months ended June 30, 2020, other than this charge, there were no significant charges (benefits) resulting from changes in estimates for closure and post-closure liabilities.
New asset retirement obligations incurred during the first six months of 2020 were discounted at the credit-adjusted risk-free rate of 5.60%.