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Asset Retirement Obligation (Tables)
3 Months Ended
Mar. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligation

Following is a summary of activity recorded during the first three months of 2016 and 2015:

 

In thousands

   2016      2015  

Balance at January 1,

   $ 419       $ 4,114   

Accretion

     —           29   

Payments

     —           (419

Gain

     —           (107
  

 

 

    

 

 

 

Balance at March 31,

   $ 419       $ 3,617