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Derivative Instruments - Schedule of Location and Fair Value of Outstanding Commodity Derivative Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Derivatives, Fair Value [Line Items] |  |
Derivative asset, gross amounts recognized | $ 50,311 | $ 482
Derivative liability, gross amount recognized |  | 81,002
Derivative asset, gross amounts offset | (6,626) | (120)
Derivative liability, gross amounts offset |  | (8,819)
Derivative asset, net asset | 43,685 | 362
Derivative liability, net liability |  | 72,183
Commodity derivative instruments [Member] | Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, gross amounts recognized | 37,829 | 482
Derivative asset, gross amounts offset | (5,978) | (120)
Derivative asset, net asset | 31,851 | 362
Commodity derivative instruments [Member] | Noncurrent Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, gross amounts recognized | 12,482 |
Derivative asset, gross amounts offset | (648) |
Derivative asset, net asset | $ 11,834 |
Commodity derivative instruments [Member] | Current Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liability, gross amount recognized |  | 66,838
Derivative liability, gross amounts offset |  | (6,369)
Derivative liability, net liability |  | 60,469
Commodity derivative instruments [Member] | Noncurrent Liabilities [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

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