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Oil and Gas Properties (Tables)
 9 Months Ended
Sep. 30, 2013
Extractive Industries [Abstract]  
Net Capitalized Costs Related to Oil and Gas Producing Activities
Oil and Gas Properties
Net capitalized costs, utilizing the successful efforts method of accounting, related to our oil and gas producing activities follows:
 
Third
Quarter-End
 
Year-End
 
2013
 
2012
 
(In thousands)
Unproved oil and gas properties
$
92,317

 
$
81,672

Proved oil and gas properties
133,017

 
81,412

Less: accumulated depreciation, depletion and amortization
(17,502
)
 
(4,657
)
Net carrying value of proved oil and gas properties
115,515

 
76,755

 
$
207,832

 
$
158,427