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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Payables and Accruals [Abstract]    
Accounts payable and other accrued expenses $ 231,697 $ 392,500
Accrued interest 73,320 79,704
Production payable 55,260 120,573
Payroll and benefits 42,728 44,496
Convertible perpetual preferred stock dividends 21,572 11,072
Drilling advances 2,295 33,195
Related party 1,545 1,852
Total accounts payable and accrued expenses $ 428,417 $ 683,392