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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