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

6 Months Ended

Jun. 30, 2021

Extractive Industries [Abstract]

Costs Incurred for Property Acquisition, Exploration and Development

	Six Months Ended June 30, 2021		Year Ended December 31, 2020
	(in thousands)
Acquisitions:
Acreage purchases	$	10,142	$	26,166
Development		207,354		369,093
Exploration:
Drilling		5,432		7,709
Expense		9,818		31,376
Stock-based compensation expense		748		1,279
Gas gathering facilities:
Development		2,179		3,694
Subtotal		235,673		439,317
Asset retirement obligations		2,098		2,610
Total costs incurred	$	237,771	$	441,927

(a) Includes costs incurred whether capitalized or expensed.