Quarterly report pursuant to Section 13 or 15(d)

Property And Equipment (Schedule Of Property And Equipment) (Details)

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Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Abstract]    
Oil and natural gas properties, full-cost accounting $ 2,906,976 $ 2,477,178
Office furniture and fixtures 6,936 6,093
Building 4,876 4,626
Land 412 412
Total property and equipment 2,919,200 2,488,309
Accumulated depletion, depreciation, amortization and impairment (841,561) (784,717)
Property and equipment, net $ 2,077,639 $ 1,703,592