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Accrued Final Capping, Closure and Post Closure (Tables)
3 Months Ended
Mar. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]  
Changes to Accrued Capping, Closure and Post-Closure Liabilities

The changes to accrued final capping, closure and post-closure liabilities are as follows:

 

     Three Months Ended
March 31,
 
     2016      2015  

Beginning balance

   $ 41,041       $ 39,829   

Obligations incurred

     526         441   

Accretion expense

     886         828   

Obligations settled (1)

     (198      (504
  

 

 

    

 

 

 

Ending balance

   $ 42,255       $ 40,594   
  

 

 

    

 

 

 

 

(1) Includes amounts that are being processed through accounts payable as a part of our disbursement cycle.