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v2.4.1.9

Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforward | $ 35,650 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 17,215 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Bonus and stock-based compensation | 11,025 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | 8,060 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Derivative instruments | 0 us-gaap_DeferredTaxAssetsDerivativeInstruments | 1,664 us-gaap_DeferredTaxAssetsDerivativeInstruments
Other tax attribute carryovers | 1,349 us-gaap_DeferredTaxAssetsOtherTaxCarryforwards | 0 us-gaap_DeferredTaxAssetsOtherTaxCarryforwards
Total deferred tax assets | 48,024 us-gaap_DeferredTaxAssetsGross | 26,939 us-gaap_DeferredTaxAssetsGross
Oil and natural gas properties | 566,382 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 343,751 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Derivative instruments | 105,911 us-gaap_DeferredTaxLiabilitiesDerivatives | 0 us-gaap_DeferredTaxLiabilitiesDerivatives
Total deferred tax liabilities | 672,293 us-gaap_DeferredTaxLiabilities | 343,751 us-gaap_DeferredTaxLiabilities
Total net deferred tax liability | $ 624,269 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 316,812 us-gaap_DeferredTaxAssetsLiabilitiesNet

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