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REMEDIAL LIABILITIES
 6 Months Ended
Jun. 30, 2021
Environmental Remediation Obligations [Abstract]  
REMEDIAL LIABILITIES REMEDIAL LIABILITIES 
The changes to remedial liabilities from January 1, 2021 through June 30, 2021 were as follows (in thousands):
Remedial
Liabilities for
Landfill Sites		Remedial
Liabilities for
Inactive Sites		Remedial
Liabilities
(Including
Superfund) for
Non-Landfill
Operations		Total
Balance at January 1, 2021$1,865 $63,060 $49,888 $114,813 
Accretion45 1,320 836 2,201 
Changes in estimates recorded to consolidated statement of operations(22)312 (145)145 
Expenditures(24)(2,833)(2,255)(5,112)
Currency translation and other— (805)1,212 407 
Balance at June 30, 2021$1,864 $61,054 $49,536 $112,454 
In the six months ended June 30, 2021, there were no significant (benefits) charges resulting from changes in estimates for remedial liabilities.