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Oil and Gas Properties (Tables)
 6 Months Ended
Jun. 30, 2015
Extractive Industries [Abstract]  
Net Capitalized Costs Related to Oil and Gas Producing Activities
Net capitalized costs, utilizing the successful efforts method of accounting, related to our oil and gas producing activities follows:
 
Second
Quarter-End
 
Year-End
 
2015
 
2014
 
(In thousands)
Unproved oil and gas properties
$
64,653

 
$
90,446

Proved oil and gas properties
222,713

 
221,299

Total costs
287,366

 
311,745

Less: accumulated depreciation, depletion and amortization
(62,901
)
 
(48,252
)
 
$
224,465

 
$
263,493