CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues and other income:
Revenues and other income	$ 382,849,000	$ 656,184,000	$ 843,594,000	$ 1,466,052,000
Derivative fair value (loss) income	(6,303,000)	195,245,000	226,872,000	133,514,000
Total revenues and other income	376,546,000	851,429,000	1,070,466,000	1,599,566,000
Costs and expenses:
Production and ad valorem taxes	5,557,000	9,889,000	14,576,000	21,199,000
Brokered natural gas and marketing	38,161,000	101,117,000	70,785,000	233,422,000
Exploration	8,027,000	8,109,000	15,104,000	16,320,000
Abandonment and impairment of unproved properties	5,524,000	12,770,000	10,937,000	25,429,000
General and administrative	38,288,000	50,631,000	80,542,000	97,269,000
Exit and termination costs	10,297,000	2,206,000	11,892,000	2,206,000
Deferred compensation plan	12,587,000	(11,142,000)	4,050,000	(7,561,000)
Interest	48,624,000	51,727,000	96,142,000	103,264,000
Gain on early extinguishment of debt	(8,991,000)	0	(21,914,000)	0
Depletion, depreciation and amortization	104,626,000	141,505,000	207,612,000	280,223,000
Impairment of proved properties	0	0	77,000,000	0
Loss (gain) on the sale of assets	426,000	(5,867,000)	(121,673,000)	(5,678,000)
Total costs and expenses	566,395,000	696,145,000	1,065,122,000	1,437,175,000
(Loss) income before income taxes	(189,849,000)	155,284,000	5,344,000	162,391,000
Income tax (benefit) expense:
Current	(3,000)	0	(366,000)	0
Deferred	(43,277,000)	40,099,000	7,304,000	45,787,000
Total (benefit) expense for income taxes	(43,280,000)	40,099,000	6,938,000	45,787,000
Net (loss) income	$ (146,569,000)	$ 115,185,000	$ (1,594,000)	$ 116,604,000
Net (loss) income per common share:
Basic	$ (0.61)	$ 0.46	$ (0.01)	$ 0.46
Diluted	(0.61)	0.46	(0.01)	0.46
Dividends paid per common share	$ 0	$ 0.02	$ 0	$ 0.04
Weighted average common shares outstanding:
Basic	239,472	247,770	242,717	247,773
Diluted	239,472	248,436	242,717	249,042
Natural Gas, NGLs and Oil Sales
Revenues and other income:
Revenues and other income	$ 349,258,000	$ 563,579,000	$ 781,354,000	$ 1,235,233,000
Brokered Natural Gas, Marketing and Other
Revenues and other income:
Revenues and other income	33,591,000	92,605,000	62,240,000	230,819,000
Direct Operating
Costs and expenses:
Costs and expenses	24,394,000	33,981,000	56,429,000	67,208,000
Transportation, Gathering, Processing and Compression
Costs and expenses:
Costs and expenses	$ 278,875,000	$ 301,219,000	$ 563,640,000	$ 603,874,000