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Natural Gas and Oil Reserves Information (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Cash Flows Relating to Proved Reserves: |  |  |  |
Future Cash Flows | $ 6,959,475 | $ 11,829,623 | $ 40,405,829 |
Future Costs: |  |  |  |
Production | (2,760,616) | (4,019,901) | (5,473,650) |
Development and Abandonment | (1,014,446) | (2,285,853) | (4,175,721) |
Future Income Taxes | (22,990) | (341,677) | (5,741,914) |
Future Net Cash Flows | 3,161,423 | 5,182,192 | 25,014,544 |
10% Discount Factor | (1,563,229) | (2,807,562) | (12,404,908) |
Standardized Measure of Discounted Future Net Cash Flows | $ 1,598,194 | $ 2,374,630 | $ 12,609,636 | $ 5,775,605

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