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Asset Retirement Obligations
3 Months Ended
Mar. 31, 2013
Asset Retirement Obligations  
Asset Retirement Obligations

9. Asset Retirement Obligations

 

The following table summarizes the changes in the Company’s asset retirement obligations:

 

 

 

March 31,

 

 

 

2013

 

 

 

(In thousands)

 

Asset retirement obligations:

 

 

 

Beginning asset retirement obligations

 

$

27,484

 

Liabilities incurred during period

 

1,676

 

Revisions in estimated retirement obligations

 

 

Liabilities settled during period

 

 

Accretion expense

 

797

 

Ending asset retirement obligations

 

$

29,957