Supplemental Information on Oil and Natural Gas Operations (Unaudited) - Results of Operations for Oil and Natural Gas Producing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Oil, natural gas and natural gas liquid sales	$ 2,129,780	$ 1,186,275	$ 527,107
Lease operating expenses	(204,975)	(126,524)	(82,428)
Production and ad valorem taxes	(132,661)	(73,505)	(34,456)
Gathering and transportation	(26,113)	(12,834)	(11,606)
Depreciation, depletion, and amortization	(594,750)	(321,870)	(176,369)
Impairment	0	0	(245,536)
Asset retirement obligation accretion expense	(2,132)	(1,391)	(1,064)
Income tax benefit (expense)	(241,149)	19,568	(192)
Results of operations	$ 928,000	$ 669,719	$ (24,544)

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A tax assessed on oil and gas production.

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Accretion expense of asset retirement obligations related to oil and gas producing activities.

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Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities.

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Costs related to the impairment of oil and gas properties.

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Income tax expense for oil and gas producing activities.

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The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs.

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Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense.

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Total revenues from oil and gas producing activities.

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Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale.

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