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Natural Gas and Oil Exploration, Development and Production Activities - Natural Gas and Oil Exploration, Development and Production Activities (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Acquisitions:      
Acreage purchases [1] $ 43,006   $ 57,869
Development [1] 433,417   577,093
Pipeline and Facilities [Abstract]      
Development [1] 6,922   4,336
Subtotal [1] 510,362   678,710
Asset retirement obligations 3,007 [1] $ 2,912 13,845 [1]
Total costs incurred [1] 513,369   692,555
Exploration Expense      
Exploration:      
Drilling [1] 4,593   12,569
Expense [1] 21,426   25,489
Stock-based compensation expense [1] $ 998   $ 1,354
[1]

(b) Includes costs incurred whether capitalized or expensed.