Condensed Consolidated Statements 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
REVENUES
Natural gas, oil and natural gas liquids sales	$ 54,351	$ 61,928	$ 140,740	$ 173,526
Brokered natural gas and marketing revenue	128	9,244	10,411	15,913
Total revenues	54,479	71,172	151,151	189,439
OPERATING EXPENSES
Lease operating	2,186	3,212	7,111	10,147
Transportation, gathering and compression	26,888	22,811	78,279	57,896
Production and ad valorem taxes	1,980	3,175	1,747	8,353
Brokered natural gas and marketing expense	42	9,262	11,604	20,057
Depreciation, depletion and amortization	28,225	67,172	64,287	170,245
Exploration	12,083	3,244	45,183	22,940
General and administrative	8,036	13,710	29,712	38,370
Rig termination and standby	(112)	174	3,843	7,597
Impairment of proved oil and gas properties			17,665	0
Accretion of asset retirement obligations	100	412	275	1,197
(Gain) loss on sale of assets	102	290	(944)	(5,183)
Total operating expenses	79,530	123,462	258,762	331,619
OPERATING LOSS	(25,051)	(52,290)	(107,611)	(142,180)
OTHER INCOME (EXPENSE)
Gain (loss) on derivative instruments	10,639	23,679	(8,407)	31,527
Interest expense, net	(12,393)	(11,774)	(38,293)	(40,196)
Gain (loss) on early extinguishment of debt		(59,392)	14,489	(59,392)
Other income (expense)	4		(137)	400
Total other expense, net	(1,750)	(47,487)	(32,348)	(67,661)
LOSS BEFORE INCOME TAXES	(26,801)	(99,777)	(139,959)	(209,841)
INCOME TAX BENEFIT (EXPENSE)		18,309	(540)	52,300
NET LOSS	$ (26,801)	$ (81,468)	$ (140,499)	$ (157,541)
NET LOSS PER COMMON SHARE
Basic and diluted	$ (0.10)	$ (0.37)	$ (0.60)	$ (0.73)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic and diluted	258,812	222,537	234,933	216,332