Capitalized Costs and Accumulated Depreciation, Depletion and Amortization

3 Months Ended

Mar. 31, 2020

Extractive Industries [Abstract]

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization

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

	March 31, 2020			December 31, 2019
	(in thousands)
Natural gas and oil properties:
Properties subject to depletion	$	9,395,279		$	9,345,557
Unproved properties		866,635			868,180
Total		10,261,914			10,213,737
Accumulated depletion and depreciation		(4,271,947	)		(4,172,702	)
Net capitalized costs	$	5,989,967		$	6,041,035

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