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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2012
Schedule of Changes in Asset Retirement Obligations

The following table reflects the changes in the Company’s ARO during the nine months ended September 30, 2012:

 

     (In thousands)  

Balance at December 31, 2011

   $ 13,075   

Liabilities incurred during period

     5,388   

Liabilities settled during period

     (42

Accretion expense during period (1)

     612   

Revisions to estimates

     1,774   
  

 

 

 

Balance at September 30, 2012

   $ 20,807   
  

 

 

 

 

(1) Included in depreciation, depletion and amortization on the Company’s Condensed Consolidated Statement of Operations.