Supplemental Crude Oil and Natural Gas Information - Changes in Standardized Measure of Discounted Future Net Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]
Standardized measure of discounted future net cash flows at beginning of year	$ 4,653,565	$ 10,461,641	$ 15,684,817
Extensions, discoveries and improved recoveries, less related costs	2,985,056	187,981	1,649,322
Revisions of previous quantity estimates	816,674	(2,952,489)	(1,564,503)
Changes in estimated future development and abandonment costs	706,168	4,760,286	1,401,513
Increase Due to Purchases of Minerals in Place	3,408,365	53,742	49,330
Net change in prices and production costs	9,396,945	(6,912,031)	(6,591,347)
Accretion of discount	489,273	1,183,993	1,865,034
Sales of crude oil and natural gas produced, net of production costs	(4,757,483)	(1,806,758)	(3,486,103)
Development costs incurred during the period	683,212	863,101	1,557,121
Change in timing of estimated future production and other	1,871,903	(2,325,024)	(1,690,779)
Change in income taxes	(3,617,285)	1,139,123	1,587,236
Net change	11,982,828	(5,808,076)	(5,223,176)
Standardized measure of discounted future net cash flows at end of year	$ 16,636,393	$ 4,653,565	$ 10,461,641