Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Oil	$ 56,055	$ 4,524	$ 108,385	$ 12,858
Natural gas	125,129	144,347	269,152	271,143
Natural gas liquids	1,782	1,461	3,901	4,554
Total revenues	182,966	150,332	381,438	288,555
Costs and expenses:
Oil and natural gas operating costs	15,827	11,902	34,614	25,519
Production and ad valorem taxes	7,364	3,981	14,973	9,229
Gathering and transportation	26,038	23,408	50,651	47,884
Depletion, depreciation and amortization	67,253	47,388	136,528	88,696
Impairment of oil and natural gas properties	0	0	0	10,707
Accretion of discount on asset retirement obligations	695	556	1,376	1,246
General and administrative	19,504	26,574	36,842	44,558
(Gain) loss on divestitures and other operating items	2,973	2,640	5,719	(182,242)
Total costs and expenses	139,654	116,449	280,703	45,597
Operating income	43,312	33,883	100,735	242,958
Other income (expense):
Interest expense, net	(25,968)	(15,105)	(46,132)	(35,297)
Gain (loss) on derivative financial instruments	(14,718)	55,246	(57,740)	11,732
Other income	77	158	123	246
Equity income (loss)	(410)	11,416	701	24,079
Total other income (expense)	(41,019)	51,715	(103,048)	760
Income (loss) before income taxes	2,293	85,598	(2,313)	243,718
Income tax expense	0	0	0	0
Net income (loss)	$ 2,293	$ 85,598	$ (2,313)	$ 243,718
Basic:
Net income (loss) (in dollars per share)	$ 0.01	$ 0.40	$ (0.01)	$ 1.13
Weighted average common shares outstanding	270,492	214,788	265,631	214,786
Diluted:
Net income (loss) (in dollars per share)	$ 0.01	$ 0.40	$ (0.01)	$ 1.13
Weighted average common shares and common share equivalents outstanding	271,226	216,023	265,631	215,347