Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands		9 Months Ended			12 Months Ended
		Sep. 30, 2022		Sep. 30, 2021	Dec. 31, 2021
Acquisitions:
Acreage purchases	[1]	$ 19,843			$ 21,942
Development	[1]	360,748			381,753
Gas gathering facilities:
Development	[1]	847			3,402
Subtotal	[1]	401,141			436,981
Asset retirement obligations		3,389	[1]	$ 2,879	18,634	[1]
Total costs incurred	[1]	404,530			455,615
Exploration Expense
Exploration:
Drilling	[1]	0			6,329
Expense	[1]	18,540			22,048
Stock-based compensation expense	[1]	$ 1,163			$ 1,507

[1] Includes costs incurred whether capitalized or expensed.