Commitments and Contingencies - Schedule of Future Minimum Transportation Fees Due (Detail) $ in Thousands	Dec. 31, 2020 USD ($)	[1]
Disclosure Commitments And Contingencies Schedule Of Future Minimum Transportation And Gathering Fees [Abstract]
2021	$ 837,792
2022	818,569
2023	782,130
2024	766,474
2025	680,757
Thereafter	4,138,532
Transportation, Gathering and Processing Contracts	$ 8,024,254

[1] The amounts in this table represent the gross amounts that we are committed to pay; however, we will record in our financial statements our proportionate share of costs based on our working interest which can vary based on volumes produced.