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Basis of Presentation (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Oct. 31, 2015
Aug. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Long-term Debt     $ 1,245,000 $ 1,110,000
Net Income (Loss) Available to Common Stockholders, Basic     $ (1,582,961)  
East Texas [Member]        
Proceeds from Sale of Oil and Gas Property and Equipment   $ 73,000    
Eagle Ford Shale, Lavaca County [Member]        
Proceeds from Sale of Oil and Gas Property and Equipment $ 12,500