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Asset Retirement Obligations (Tables)
3 Months Ended
Mar. 31, 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)
March 31,
December 31,
2013
2012
Beginning asset retirement obligation
$686$510
Accretion of discount
934
Liabilities incurred
11142
Ending asset retirement obligation
$706$686
Mining properties
$165$162
Oil & Gas wells
541524
Ending asset retirement obligation
$706$686