Derivative Financial Instruments - Summary of Realized and Unrealized Gains and Losses on Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain			$ (39,096)	$ (9,956)
(Loss) gain on commodity contracts, net	$ (20,679)	$ 9,496	79,105	(38,398)
Derivatives Not Designated as Hedging Contracts \| (Loss) Gain On Derivative Contracts, Net
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain	(50,036)	4,902	40,009	(48,354)
Realized gain	29,357	4,594	39,096	9,956
(Loss) gain on commodity contracts, net	(20,679)	$ 9,496	79,105	$ (38,398)
Oil and Gas Joint Interest Billing Receivables, Current \| Commodity Contracts \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset	$ 4,700		$ 4,700		$ 600

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell mineral resources, energy, and agricultural products at some future point held at each balance sheet date, that was included in earnings for the period.

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