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CLOSURE AND POST-CLOSURE LIABILITIES
 3 Months Ended
Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]  
CLOSURE AND POST-CLOSURE LIABILITIES
CLOSURE AND POST-CLOSURE LIABILITIES
The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) for the three months ended March 31, 2015 were as follows (in thousands):
 
Landfill
Retirement
Liability
 
Non-Landfill
Retirement
Liability
 
Total
Balance at January 1, 2015
$
29,932

 
$
20,769

 
$
50,701

New asset retirement obligations
753

 
—

 
753

Accretion
682

 
496

 
1,178

Changes in estimates recorded to statement of income
—

 
(24
)
 
(24
)
Changes in estimates recorded to balance sheet
(932
)
 
—

 
(932
)
Expenditures
(246
)
 
(19
)
 
(265
)
Currency translation and other
(196
)
 
(95
)
 
(291
)
Balance at March 31, 2015
$
29,993

 
$
21,127

 
$
51,120


All of the landfill facilities included in the above were active as of March 31, 2015. New asset retirement obligations incurred during the first three months of 2015 were discounted at the credit-adjusted risk-free rate of 5.99%. There were no significant charges (benefits) in 2015 resulting from changes in estimates for closure and post-closure liabilities.