Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
		Mar. 31, 2024		Mar. 31, 2023	Dec. 31, 2023
Acquisitions:
Acreage purchases	[1]	$ 14,196			$ 40,067
Development	[1]	152,038			568,484
Gas gathering facilities:
Development	[1]	2,626			3,123
Subtotal	[1]	173,386			638,204
Asset retirement obligations		1,462	[1]	$ 790	4,616	[1]
Total costs incurred	[1]	174,848			642,820
Exploration Expense
Exploration:
Drilling	[1]	0			0
Expense	[1]	4,202			25,280
Stock-based compensation expense	[1]	$ 324			$ 1,250

[1] (a) Includes costs incurred whether capitalized or expensed.