CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues and other income:
Total Revenues from Contracts with Customers	$ 3,580,439,000	$ 1,780,986,000	$ 2,600,934,000
Derivative fair value (loss) income	(650,216,000)	187,711,000	226,681,000
Total revenues and other income	2,930,223,000	1,968,697,000	2,827,615,000
Costs and expenses:
Production and ad valorem taxes	29,317,000	24,617,000	37,967,000
Brokered natural gas and marketing	367,288,000	188,316,000	359,892,000
Exploration	23,555,000	32,654,000	36,683,000
Abandonment and impairment of unproved properties	7,206,000	19,334,000	1,235,342,000
General and administrative	169,766,000	159,415,000	181,109,000
Exit and termination costs	21,661,000	547,409,000	9,506,000
Deferred compensation plan	68,351,000	12,541,000	(15,472,000)
Interest	227,336,000	192,667,000	194,285,000
Loss (gain) on early extinguishment of debt	98,000	(14,068,000)	(5,415,000)
Depletion, depreciation and amortization	364,555,000	394,330,000	548,843,000
Impairment of proved properties and other assets	0	78,955,000	1,095,634,000
(Gain) loss on the sale of assets	(701,000)	(110,791,000)	30,256,000
Total costs and expenses	2,528,188,000	2,706,026,000	5,044,203,000
Income (loss) before income taxes	402,035,000	(737,329,000)	(2,216,588,000)
Income tax (benefit) expense:
Current	7,984,000	(523,000)	6,147,000
Deferred	(17,727,000)	(25,029,000)	(506,438,000)
Total (benefit) expense for income taxes	(9,743,000)	(25,552,000)	(500,291,000)
Net income (loss)	$ 411,778,000	$ (711,777,000)	$ (1,716,297,000)
Net loss per common share:
Basic	$ 1.65	$ (2.95)	$ (6.92)
Diluted	$ 1.61	$ (2.95)	$ (6.92)
Weighted average common shares outstanding:
Basic	242,862	241,373	247,970
Diluted	249,314	241,373	247,970
Natural Gas, NGLs and Oil Sales
Revenues and other income:
Total Revenues from Contracts with Customers	$ 3,215,027,000	$ 1,607,713,000	$ 2,255,425,000
Brokered Natural Gas, Marketing and Other
Revenues and other income:
Total Revenues from Contracts with Customers	365,412,000	173,273,000	345,509,000
Direct Operating
Costs and expenses:
Costs and expenses	75,287,000	92,157,000	136,276,000
Transportation, Gathering, Processing and Compression
Costs and expenses:
Costs and expenses	$ 1,174,469,000	$ 1,088,490,000	$ 1,199,297,000