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, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows Relating to Proved Reserves:
Future Cash Flows	$ 11,829,623	$ 40,405,829	$ 20,396,381
Future Costs:
Production	(4,019,901)	(5,473,650)	(3,954,726)
Development and Abandonment	(2,285,853)	(4,175,721)	(2,752,603)
Future Income Taxes	(341,677)	(5,741,914)	(2,065,316)
Future Net Cash Flows	5,182,192	25,014,544	11,623,736
10% Discount Factor	(2,807,562)	(12,404,908)	(5,848,131)
Standardized Measure of Discounted Future Net Cash Flows	$ 2,374,630	$ 12,609,636	$ 5,775,605	$ 1,935,725