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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Discounted Future Net Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revisions of previous estimates: |  |  |
Changes in prices and production costs | $ (23,584,574) | $ 14,326,997 | $ 11,600,850
Revisions in quantities | (131,078) | 109,129 | 577,737
Changes in future development and abandonment costs | (123,529) | (524,847) | (53,818)
Net change in income taxes | 3,920,556 | (2,625,699) | (2,248,161)
Accretion of discount | 2,955,359 | 1,486,783 | 298,077
Additions to proved reserves from extensions, discoveries and improved recovery | 103,116 | 2,842,173 | 1,423,510
Natural gas, NGLs and oil sales, net of production costs | (1,100,908) | (3,550,632) | (1,934,254)
Actual development costs incurred during the period | 574,646 | 471,877 | 399,681
Changes in timing and other | (320,385) | (475,724) | (424,718)
Net change for the year | (17,706,797) | 12,060,057 | 9,638,904
Beginning of year | 24,545,283 | 12,485,226 | 2,846,322
End of year | $ 6,838,486 | $ 24,545,283 | $ 12,485,226

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