CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
OPERATING REVENUES
Natural gas	$ 260,200	$ 222,963	$ 711,010	$ 807,960
Crude oil and condensate	37,777	59,014	114,610	202,804
Gain (loss) on derivative instruments	6,904	17,364	(1,286)	44,668
Brokered natural gas	3,641	4,010	9,417	12,650
Other	1,907	1,945	5,435	8,277
TOTAL OPERATING REVENUES	310,429	305,296	839,186	1,076,359
OPERATING EXPENSES
Direct operations	24,626	34,818	77,139	106,947
Transportation and gathering	105,671	102,121	322,883	321,652
Brokered natural gas	2,939	3,020	7,526	9,643
Taxes other than income	8,771	11,407	23,737	34,298
Exploration	2,988	4,930	13,109	18,960
Depreciation, depletion and amortization	139,490	144,326	448,910	472,335
General and administrative	19,776	11,102	68,399	53,611
TOTAL OPERATING EXPENSES	304,261	311,724	961,703	1,017,446
Earnings (loss) on equity method investments	(1,727)	1,648	208	4,581
Gain (loss) on sale of assets	(1,245)	3,756	(768)	3,814
INCOME (LOSS) FROM OPERATIONS	3,196	(1,024)	(123,077)	67,308
Loss on debt extinguishment	0	0	4,709	0
Interest expense	21,483	24,510	67,821	72,244
Income (loss) before income taxes	(18,287)	(25,534)	(195,607)	(4,936)
Income tax expense (benefit)	(8,027)	(10,020)	(71,243)	(2,169)
NET INCOME (LOSS)	$ (10,260)	$ (15,514)	$ (124,364)	$ (2,767)
Earnings (loss) per share
Basic (in dollars per share)	$ (0.02)	$ (0.04)	$ (0.27)	$ (0.01)
Diluted (in dollars per share)	$ (0.02)	$ (0.04)	$ (0.27)	$ (0.01)
Weighted-average common shares outstanding
Basic (in shares)	465,149	413,846	454,060	413,636
Diluted (in shares)	465,149	413,846	454,060	413,636
Dividends per common share (in dollars per share)	$ 0.02	$ 0.02	$ 0.06	$ 0.06