Derivative Financial Instruments - Summary of Realized and Unrealized Gains and Losses on Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Realized (loss) gain	$ 10,905	$ (9,739)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	(33,263)	99,784
Derivatives Not Designated as Hedging Contracts \| (Loss) Gain On Derivative Contracts, Net
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain	(22,358)	90,045
Realized (loss) gain	(10,905)	9,739
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	(33,263)	$ 99,784
Oil and Gas Joint Interest Billing Receivables, Current \| Commodity contracts \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset	$ 10		$ 2,300

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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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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