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Derivative Instruments - Schedule of Location and Fair Value of Outstanding Commodity Derivative Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Derivative asset, gross amounts recognized $ 10,326 $ 482
Derivative liability, gross amount recognized 21,480 81,002
Derivative asset, gross amounts offset (3,485) (120)
Derivative liability, gross amounts offset (6,853) (8,819)
Derivative asset, net asset 6,841 362
Derivative liability, net liability 14,627 72,183
Current Assets [Member] | Commodity derivative instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative asset, gross amounts recognized 5,178 482
Derivative asset, gross amounts offset (2,152) (120)
Derivative asset, net asset 3,026 362
Noncurrent Assets [Member] | Commodity derivative instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative asset, gross amounts recognized 5,148  
Derivative asset, gross amounts offset (1,333)  
Derivative asset, net asset 3,815  
Current Liabilities [Member] | Commodity derivative instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liability, gross amount recognized 21,480 66,838
Derivative liability, gross amounts offset (6,853) (6,369)
Derivative liability, net liability $ 14,627 60,469
Noncurrent Liabilities [Member] | Commodity derivative instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liability, gross amount recognized   14,164
Derivative liability, gross amounts offset   (2,450)
Derivative liability, net liability   $ 11,714