CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues and other income:
Total Revenues from Contracts with Customers	$ 954,859,000	$ 424,035,000	$ 2,323,175,000	$ 1,267,629,000
Derivative fair value (loss) income	(652,220,000)	(124,690,000)	(959,782,000)	102,182,000
Total revenues and other income	302,639,000	299,345,000	1,363,393,000	1,369,811,000
Costs and expenses:
Production and ad valorem taxes	7,140,000	6,106,000	20,179,000	20,682,000
Brokered natural gas and marketing	105,838,000	47,967,000	247,177,000	118,752,000
Exploration	5,881,000	8,086,000	16,447,000	23,190,000
Abandonment and impairment of unproved properties	2,000,000	5,667,000	7,206,000	16,604,000
General and administrative	49,061,000	38,153,000	127,307,000	118,695,000
Exit and termination costs	11,789,000	521,633,000	9,557,000	533,525,000
Deferred compensation plan	34,278,000	6,237,000	89,551,000	10,287,000
Interest	56,809,000	47,999,000	170,974,000	144,141,000
Loss (gain) on early extinguishment of debt		7,821,000	98,000	(14,093,000)
Depletion, depreciation and amortization	93,116,000	96,167,000	272,128,000	303,779,000
Impairment of proved properties and other assets	0	1,955,000	0	78,955,000
(Gain) loss on the sale of assets	(78,000)	(9,230,000)	(724,000)	(112,443,000)
Total costs and expenses	682,589,000	1,084,644,000	1,871,237,000	2,149,766,000
Loss before income taxes	(379,950,000)	(785,299,000)	(507,844,000)	(779,955,000)
Income tax expense (benefit):
Current	4,484,000	0	7,221,000	(366,000)
Deferred	(34,167,000)	(36,509,000)	(35,477,000)	(29,411,000)
Total (benefit) expense for income taxes	(29,683,000)	(36,509,000)	(28,256,000)	(29,777,000)
Net loss	$ (350,267,000)	$ (748,790,000)	$ (479,588,000)	$ (750,178,000)
Net loss per common share:
Basic	$ (1.44)	$ (3.12)	$ (1.98)	$ (3.10)
Diluted	$ (1.44)	$ (3.12)	$ (1.98)	$ (3.10)
Weighted average common shares outstanding:
Basic	243,311	239,895	242,692	241,770
Diluted	243,311	239,895	242,692	241,770
Natural Gas, NGLs and Oil Sales
Revenues and other income:
Total Revenues from Contracts with Customers	$ 849,305,000	$ 381,553,000	$ 2,074,507,000	$ 1,162,907,000
Brokered Natural Gas, Marketing and Other
Revenues and other income:
Total Revenues from Contracts with Customers	105,554,000	42,482,000	248,668,000	104,722,000
Direct Operating
Costs and expenses:
Costs and expenses	20,245,000	19,515,000	57,653,000	75,944,000
Transportation, Gathering, Processing and Compression
Costs and expenses:
Costs and expenses	$ 296,510,000	$ 268,108,000	$ 853,684,000	$ 831,748,000