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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
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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

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