Condensed Consolidated Statements 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
REVENUES
Oil and natural gas sales	$ 45,901	$ 64,984	$ 86,389	$ 111,598
Brokered natural gas and marketing revenue	1,165	9,469	10,283	6,669
Total revenues	47,066	74,453	96,672	118,267
OPERATING EXPENSES
Lease operating	2,248	3,589	4,925	6,935
Transportation, gathering and compression	28,254	22,634	51,391	35,085
Production and ad valorem taxes	2,051	3,078	(233)	5,178
Brokered natural gas and marketing expense	2,160	10,795	11,562	10,795
Depreciation, depletion and amortization	20,949	60,641	36,062	103,073
Exploration	17,444	6,243	33,100	19,696
General and administrative	10,402	12,717	21,676	24,660
Rig termination and standby	1,292	366	3,955	7,423
Impairment of proved oil and gas properties			17,665	0
Accretion of asset retirement obligations	89	399	175	785
(Gain) loss on sale of assets	(1,024)	(5,553)	(1,046)	(5,473)
Total operating expenses	83,865	114,909	179,232	208,157
OPERATING LOSS	(36,799)	(40,456)	(82,560)	(89,890)
OTHER INCOME (EXPENSE)
Gain (loss) on derivative instruments	(29,596)	(3,523)	(19,046)	7,848
Interest expense, net	(12,439)	(14,401)	(25,900)	(28,422)
Gain on early extinguishment of debt	5,825		14,489	0
Other income (expense)	(2)	(2)	(141)	400
Total other expense, net	(36,212)	(17,926)	(30,598)	(20,174)
LOSS BEFORE INCOME TAXES	(73,011)	(58,382)	(113,158)	(110,064)
INCOME TAX BENEFIT (EXPENSE)		16,412	(540)	33,991
NET LOSS	$ (73,011)	$ (41,970)	$ (113,698)	$ (76,073)
NET LOSS PER COMMON SHARE
Basic and diluted	$ (0.33)	$ (0.19)	$ (0.51)	$ (0.36)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic and diluted	223,013	222,502	222,898	213,178