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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2013
Estimated Fair Value of Company's Asset Retirement Obligations

A summary of the recording of the estimated fair value of the Company’s asset retirement obligations is presented as follows:

 

(In Thousands)

Year Ended December 31,

 

 

2013

 

 

2012

 

 

2011

 

Balances at January 1,

$

10,368

  

 

$

14,528

  

 

$

13,425

  

Accretion Expense

 

643

  

 

 

814

  

 

 

1,014

  

Additions

 

453

  

 

 

770

  

 

 

96

  

Revisions

 

0

 

 

 

(5,744

) 

 

 

(7

) 

Balance December 31,

$

11,464

  

 

$

10,368

  

 

$

14,528