Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Acquisitions
Acreage purchases	[1]	$ 40,067	$ 28,735	$ 21,942
Development	[1]	568,484	460,668	381,753
Gas gathering facilities:
Development	[1]	3,123	1,466	3,402
Subtotal	[1]	638,204	517,641	436,981
Asset retirement obligations	[1]	4,616	18,096	18,634
Total costs incurred	[1]	642,820	535,737	455,615
Exploration Expense
Exploration:
Exploration drilling costs incurred	[1]	0	0	6,329
Exploration costs incurred	[1]	25,280	25,194	22,048
Stock-based compensation expense	[1]	$ 1,250	$ 1,578	$ 1,507

[1] Includes cost incurred whether capitalized or expensed.