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REMEDIAL LIABILITIES
 6 Months Ended
Jun. 30, 2017
Environmental Remediation Obligations [Abstract]  
REMEDIAL LIABILITIES
REMEDIAL LIABILITIES 
The changes to remedial liabilities for the six months ended June 30, 2017 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, 2017
$
1,777

 
$
64,151

 
$
62,079

 
$
128,007

Measurement period adjustments from prior period acquisitions
—

 
—

 
504

 
504

Accretion
43

 
1,332

 
967

 
2,342

Changes in estimates recorded to statement of operations
(36
)
 
(120
)
 
289

 
133

Expenditures
(19
)
 
(2,068
)
 
(3,205
)
 
(5,292
)
Currency translation and other
(1
)
 
2,712

 
(2,246
)
 
465

Balance at June 30, 2017
$
1,764

 
$
66,007

 
$
58,388

 
$
126,159


In the six months ended June 30, 2017, there were no significant charges (benefits) resulting from changes in estimates for remedial liabilities.