CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues and other income:
Revenues and other income	$ 809,868,000	$ 756,608,000
Derivative fair value loss	(61,731,000)	(14,009,000)
Total revenues and other income	748,137,000	742,599,000
Costs and expenses:
Production and ad valorem taxes	11,310,000	9,926,000
Brokered natural gas and marketing	132,305,000	55,594,000
Exploration	8,211,000	7,719,000
Abandonment and impairment of unproved properties	12,659,000	11,773,000
General and administrative	46,638,000	68,417,000
Termination costs	0	(37,000)
Deferred compensation plan	3,581,000	(7,397,000)
Interest	51,537,000	52,385,000
Depletion, depreciation and amortization	138,718,000	162,266,000
Impairment of proved properties	0	7,312,000
Loss (gain) on the sale of assets	189,000	(23,000)
Total costs and expenses	741,030,000	650,685,000
Income before income taxes	7,107,000	91,914,000
Income tax expense:
Current	0	0
Deferred	5,688,000	42,676,000
Total (benefit) expense for income taxes	5,688,000	42,676,000
Net income	$ 1,419,000	$ 49,238,000
Net income per common share:
Basic	$ 0.01	$ 0.20
Diluted	0.01	0.20
Dividends paid per common share	$ 0.02	$ 0.02
Weighted average common shares outstanding:
Basic	247,776	245,709
Diluted	249,154	246,594
Natural Gas, NGLs and Oil Sales
Revenues and other income:
Revenues and other income	$ 671,654,000	$ 696,629,000
Brokered Natural Gas, Marketing and Other
Revenues and other income:
Revenues and other income	138,214,000	59,979,000
Direct Operating
Costs and expenses:
Costs and expenses	33,227,000	38,122,000
Transportation, Gathering, Processing and Compression
Costs and expenses:
Costs and expenses	$ 302,655,000	$ 244,628,000