Oil and Gas Reserves Information (Unaudited) - Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves (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, Beginning of Year	$ 1,935,725	$ 2,913,211	$ 1,473,840
Net change in sales price, net of production costs	5,012,696	(1,858,026)	(716,930)
Development costs incurred during the year which were previously estimated	502,674	302,135	311,331
Revisions of quantity estimates	119,200	215,268	16,340
Accretion of discount	199,124	326,074	175,514
Changes in future development and abandonment costs	1,505	313,191	(93,476)
Changes in timing and other	(224,617)	(127,663)	180,314
Extensions and discoveries	679,418	180,624	442,099
Acquisitions of minerals in place	150,065	0	1,813,491
Sales of minerals in place	(64,032)	0	(51,070)
Sales, net of production costs	(1,567,182)	(612,194)	(580,922)
Net changes in income taxes	(968,971)	283,105	(57,320)
Standardized Measure, End of Year	$ 5,775,605	$ 1,935,725	$ 2,913,211