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REMEDIAL LIABILITIES (Tables)
 6 Months Ended
Jun. 30, 2013
Environmental Remediation Obligations [Abstract]  
Changes to remedial liabilities
The changes to remedial liabilities for the six months ended June 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

Adjustments during the measurement period related to acquisitions
 
—

 
8,581

 
2,473

 
11,054

Accretion
 
140

 
1,660

 
1,583

 
3,383

Changes in estimates recorded to statement of income
 
(21
)
 
(156
)
 
(335
)
 
(512
)
Expenditures
 
(44
)
 
(4,200
)
 
(3,684
)
 
(7,928
)
Currency translation and other
 
(169
)
 
(84
)
 
(1,243
)
 
(1,496
)
Balance at June 30, 2013
 
$
5,735

 
$
76,880

 
$
89,106

 
$
171,721