CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues and other income:
Natural gas, NGLs and oil sales	$ 661,390,000	$ 506,137,000	$ 1,358,019,000	$ 1,065,587,000
Derivative fair value (loss) income	(103,290,000)	111,195,000	(117,299,000)	276,752,000
Brokered natural gas, marketing and other	98,084,000	55,779,000	158,063,000	107,427,000
Total revenues and other income	656,184,000	673,111,000	1,398,783,000	1,449,766,000
Costs and expenses:
Direct operating	35,088,000	31,420,000	73,210,000	59,443,000
Transportation, gathering, processing and compression	269,910,000	191,590,000	514,538,000	369,238,000
Production and ad valorem taxes	10,140,000	9,969,000	20,066,000	19,132,000
Brokered natural gas and marketing	102,747,000	55,857,000	158,341,000	109,407,000
Exploration	7,499,000	14,498,000	15,218,000	23,002,000
Abandonment and impairment of unproved properties	54,922,000	5,193,000	66,695,000	9,613,000
General and administrative	47,583,000	52,322,000	116,000,000	99,818,000
Termination costs	0	(96,000)	(37,000)	4,096,000
Deferred compensation plan	6,615,000	(14,466,000)	(782,000)	(27,635,000)
Interest	53,862,000	47,926,000	106,247,000	95,027,000
Depletion, depreciation and amortization	161,026,000	152,504,000	323,292,000	302,325,000
Impairment of proved properties	15,302,000	0	22,614,000	0
Gain on the sale of assets	(156,000)	(807,000)	(179,000)	(23,407,000)
Total costs and expenses	764,538,000	545,910,000	1,415,223,000	1,040,059,000
(Loss) income before income taxes	(108,354,000)	127,201,000	(16,440,000)	409,707,000
Income tax (benefit) expense:
Current	0	0	0	0
Deferred	(28,518,000)	57,651,000	14,158,000	170,046,000
Total (benefit) expense for income taxes	(28,518,000)	57,651,000	14,158,000	170,046,000
Net (loss) income	$ (79,836,000)	$ 69,550,000	$ (30,598,000)	$ 239,661,000
Net (loss) income per common share:
Basic	$ (0.32)	$ 0.28	$ (0.13)	$ 0.97
Diluted	(0.32)	0.28	(0.13)	0.97
Dividends paid per common share	$ 0.02	$ 0.02	$ 0.04	$ 0.04
Weighted average common shares outstanding:
Basic	245,880	245,177	245,795	244,916
Diluted	245,880	245,335	245,795	245,242