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REMEDIAL LIABILITIES
 9 Months Ended
Sep. 30, 2018
Environmental Remediation Obligations [Abstract]  
REMEDIAL LIABILITIES
REMEDIAL LIABILITIES 
The changes to remedial liabilities for the nine months ended September 30, 2018 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, 2018
$
1,800

 
$
65,342

 
$
57,326

 
$
124,468

Accretion
64

 
2,074

 
1,395

 
3,533

Changes in estimates recorded to statement of operations
—

 
(56
)
 
(645
)
 
(701
)
Expenditures
(35
)
 
(2,911
)
 
(3,236
)
 
(6,182
)
Currency translation and other
—

 
892

 
(1,298
)
 
(406
)
Balance at September 30, 2018
$
1,829

 
$
65,341

 
$
53,542

 
$
120,712


In the nine months ended September 30, 2018, there were no significant charges (benefits) resulting from changes in estimates for remedial liabilities.