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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2013
Asset Retirement Obligations [Abstract]  
Reconciliation of the total liability for asset retirement obligations
The following is a reconciliation of the total liability for asset retirement obligations:
 
   
(In thousands)
 
   
September 30,
  
December 31,
 
   
2013
  
2012
 
Beginning asset retirement obligation
 $686  $510 
Accretion of discount
  28   34 
Liabilities incurred
  61   142 
Ending asset retirement obligation
 $775  $686 
          
Mineral properties
 $171  $162 
Oil & Gas wells
  604   524 
Ending asset retirement obligation
 $775  $686