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Natural Gas and Oil 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, 2024
Dec. 31, 2023
Dec. 31, 2022
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 $ 2,374,630 $ 12,609,636 $ 5,775,605
Net change in sales price, net of production costs (1,478,758) (14,069,134) 8,600,315
Development costs incurred during the year which were previously estimated 452,533 1,004,650 788,450
Revisions of quantity estimates (693,905) (1,583,876) (42,423)
Accretion of discount 250,170 1,551,704 680,010
Changes in future development and abandonment costs 764,629 1,095,844 (869,115)
Changes in timing and other 94,058 (374,087) (113,744)
Extensions and discoveries 380,544 215,249 2,456,124
Acquisitions of minerals in place 0 0 604
Sales of minerals in place (3,542) 0 (3,313)
Sales, net of production costs (664,653) (855,699) (2,779,960)
Net changes in income taxes 122,488 2,780,343 (1,882,917)
Standardized Measure, End of Year $ 1,598,194 $ 2,374,630 $ 12,609,636