Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Tables)

3 Months Ended

Mar. 31, 2022

Extractive Industries [Abstract]

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization

	March 31, 2022			December 31, 2021
	(in thousands)
Natural gas properties:
Properties subject to depletion	$	9,447,907		$	9,338,236
Unproved properties		843,612			837,334
Total		10,291,519			10,175,570
Accumulated depletion and depreciation		(4,504,554	)		(4,420,914	)
Net capitalized costs	$	5,786,965		$	5,754,656

(a) Includes capitalized asset retirement costs and the associated accumulated amortization.