CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
OPERATING REVENUES
Natural gas	$ 223,232	$ 224,806	$ 450,811	$ 584,997
Crude oil and condensate	46,156	81,233	76,833	143,791
Gain (loss) on derivative instruments	(27,184)	(6,819)	(8,190)	27,304
Brokered natural gas	2,596	3,813	5,776	8,640
Other	2,016	3,264	3,527	6,330
TOTAL OPERATING REVENUES	246,816	306,297	528,757	771,062
OPERATING EXPENSES
Direct operations	26,477	36,112	52,513	72,129
Transportation and gathering	107,560	98,295	217,213	219,531
Brokered natural gas	2,021	2,885	4,587	6,624
Taxes other than income	8,973	11,611	14,967	22,891
Exploration	3,738	5,298	10,121	14,030
Depreciation, depletion and amortization	147,533	152,513	309,420	328,009
General and administrative	20,247	19,978	48,621	42,507
TOTAL OPERATING EXPENSES	316,549	326,692	657,442	705,721
Earnings (loss) on equity method investments	(73)	1,512	1,935	2,933
Gain (loss) on sale of assets	(878)	(79)	477	59
INCOME (LOSS) FROM OPERATIONS	(70,684)	(18,962)	(126,273)	68,333
Loss on debt extinguishment	4,709	0	4,709	0
Interest expense	21,963	24,168	46,338	47,734
Income (loss) before income taxes	(97,356)	(43,130)	(177,320)	20,599
Income tax expense (benefit)	(34,446)	(15,622)	(63,216)	7,852
NET INCOME (LOSS)	$ (62,910)	$ (27,508)	$ (114,104)	$ 12,747
Earnings (loss) per share
Basic (in dollars per share)	$ (0.14)	$ (0.07)	$ (0.25)	$ 0.03
Diluted (in dollars per share)	$ (0.14)	$ (0.07)	$ (0.25)	$ 0.03
Weighted-average common shares outstanding
Basic (in shares)	465,068	413,713	448,455	413,530
Diluted (in shares)	465,068	413,713	448,455	414,878
Dividends per common share (in dollars per share)	$ 0.02	$ 0.02	$ 0.04	$ 0.04