CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
OPERATING REVENUES
Natural gas	$ 395,328	$ 223,232	$ 828,770	$ 450,811
Crude oil and condensate	44,625	46,156	87,616	76,833
Gain (loss) on derivative instruments	13,805	(27,184)	47,190	(8,190)
Brokered natural gas	4,037	2,596	8,732	5,776
Other	2,662	2,016	5,994	3,527
TOTAL OPERATING REVENUES	460,457	246,816	978,302	528,757
OPERATING EXPENSES
Direct operations	27,262	26,477	51,903	52,513
Transportation and gathering	120,544	107,560	244,018	217,213
Brokered natural gas	3,419	2,021	7,465	4,587
Taxes other than income	8,310	8,973	17,368	14,967
Exploration	3,959	3,738	10,157	10,121
Depreciation, depletion and amortization	144,322	147,533	279,422	309,420
Impairment of oil and gas properties	68,555	0	68,555	0
General and administrative	23,957	19,945	47,659	47,817
TOTAL OPERATING EXPENSES	400,328	316,247	726,547	656,638
Earnings (loss) on equity method investments	(1,286)	(73)	(2,569)	1,935
Gain (loss) on sale of assets	(1,403)	(878)	(1,626)	477
INCOME (LOSS) FROM OPERATIONS	57,440	(70,382)	247,560	(125,469)
Interest expense	20,619	21,963	41,390	46,338
Loss on debt extinguishment	0	4,709	0	4,709
Other (income) expense	(315)	302	109	804
Income (loss) before income taxes	37,136	(97,356)	206,061	(177,320)
Income tax expense (benefit)	15,609	(34,446)	78,814	(63,216)
NET INCOME (LOSS)	$ 21,527	$ (62,910)	$ 127,247	$ (114,104)
Earnings (loss) per share
Basic (in dollars per share)	$ 0.05	$ (0.14)	$ 0.27	$ (0.25)
Diluted (in dollars per share)	$ 0.05	$ (0.14)	$ 0.27	$ (0.25)
Weighted-average common shares outstanding
Basic (in shares)	464,768	465,068	465,057	448,455
Diluted (in shares)	466,745	465,068	466,752	448,455
Dividends per common share (in dollars per share)	$ 0.05	$ 0.02	$ 0.07	$ 0.04