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Natural Gas and Oil Exploration, Development and Production Activities - Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Detail) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Natural gas properties:    
Properties subject to depletion [1] $ 11,277,340 $ 11,058,771
Unproved properties [1] 833,743 819,656
Total [1] 12,111,083 11,878,427
Accumulated depletion and depreciation [1] (5,575,986) (5,456,727)
Net capitalized costs [1] $ 6,535,097 $ 6,421,700
[1] Includes capitalized asset retirement costs and the associated accumulated amortization.