Capitalized Costs and Accumulated Depreciation, Depletion and Amortization

9 Months Ended

Sep. 30, 2021

Extractive Industries [Abstract]

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization

(8) Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a)

	September 30, 2021			December 31, 2020
	(in thousands)
Natural gas properties:
Properties subject to depletion	$	9,203,586		$	8,891,348
Unproved properties		864,659			859,766
Total		10,068,245			9,751,114
Accumulated depletion and depreciation		(4,330,289	)		(4,064,305	)
Net capitalized costs	$	5,737,956		$	5,686,809

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