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REMEDIAL LIABILITIES (Tables)
 9 Months Ended
Sep. 30, 2013
Environmental Remediation Obligations [Abstract]  
Changes to remedial liabilities
The changes to remedial liabilities for the nine months ended September 30, 2013 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, 2013
 
$
5,829

 
$
71,079

 
$
90,312

 
$
167,220

Liabilities assumed in acquisitions
 
—

 
—

 
2,384

 
$
2,384

Adjustments during the measurement period related to acquisitions
 
—

 
8,855

 
3,726

 
12,581

Accretion
 
210

 
2,505

 
2,377

 
5,092

Changes in estimates recorded to statement of income
 
(62
)
 
(2,341
)
 
285

 
(2,118
)
Expenditures
 
(67
)
 
(6,307
)
 
(5,717
)
 
(12,091
)
Currency translation and other
 
(108
)
 
(54
)
 
(815
)
 
(977
)
Balance at September 30, 2013
 
$
5,802

 
$
73,737

 
$
92,552

 
$
172,091