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REMEDIAL LIABILITIES (Tables)
3 Months Ended
Mar. 31, 2016
Environmental Remediation Obligations [Abstract]  
Changes to remedial liabilities
The changes to remedial liabilities for the three months ended March 31, 2016 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, 2016
$
2,327

 
$
63,613

 
$
66,052

 
$
131,992

Accretion
26

 
678

 
543

 
1,247

Changes in estimates recorded to statement of operations
71

 
(101
)
 
350

 
320

Expenditures
(26
)
 
(956
)
 
(2,033
)
 
(3,015
)
Currency translation and other

 
51

 
784

 
835

Balance at March 31, 2016
$
2,398

 
$
63,285

 
$
65,696

 
$
131,379