Costs Incurred for Property Acquisition, Exploration and Development (Tables)

3 Months Ended

Mar. 31, 2021

Extractive Industries [Abstract]

Costs Incurred for Property Acquisition, Exploration and Development

	Three Months Ended March 31, 2021		Year Ended December 31, 2020
	(in thousands)
Acquisitions:
Acreage purchases	$	6,424	$	26,166
Development		92,654		369,093
Exploration:
Drilling		4,431		7,709
Expense		5,151		31,376
Stock-based compensation expense		387		1,279
Gas gathering facilities:
Development		1,551		3,694
Subtotal		110,598		439,317
Asset retirement obligations		761		2,610
Total costs incurred	$	111,359	$	441,927

^(a) Includes costs incurred whether capitalized or expensed.