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Oil and Gas Properties (Tables)
6 Months Ended
Jun. 30, 2013
Extractive Industries [Abstract]  
Net Capitalized Costs Related to Oil and Gas Producing Activities
Oil and Gas Properties
Net capitalized costs related to our oil and gas producing activities follows:
 
Second
Quarter-End
 
Year-End
 
2013
 
2012
 
(In thousands)
Unproved oil and gas properties
$
84,032

 
$
81,672

Proved oil and gas properties
109,960

 
81,412

Less: accumulated depreciation, depletion and amortization
(12,501
)
 
(4,657
)
Net carrying value of proved oil and gas properties
97,459

 
76,755

 
$
181,491

 
$
158,427