Consolidated Statement of Operations (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Natural gas sales	$ 824,266,000	$ 695,733,000	$ 982,413,000
Oil sales	109,138,000	114,241,000	119,383,000
Total operating revenues	933,404,000	809,974,000	1,101,796,000
Expenses:
Lease operating expenses	68,106,000	63,823,000	51,758,000
Liquids gathering system operating lease expense	20,000,000	645,000	0
Production taxes	72,398,000	60,757,000	97,094,000
Gathering fees	52,074,000	59,004,000	56,511,000
Transportation charges	82,797,000	84,470,000	64,243,000
Depletion and depreciation	243,390,000	388,985,000	346,394,000
Ceiling test and other impairments	0	2,972,464,000	0
General and Administrative Expense	22,373,000	25,104,000	26,032,000
Total operating expenses	561,138,000	3,655,252,000	642,032,000
Operating income (loss)	372,266,000	(2,845,278,000)	459,764,000
Other income (expense), net:
Interest expense	(101,486,000)	(88,180,000)	(63,156,000)
Gain (loss) on commodity derivatives	(46,754,000)	73,581,000	313,732,000
Deferred gain on sale of liquids gathering system	10,553,000	0	0
Contract Cancellation Fees	0	(15,469,000)	0
Other income (expense) net	(357,000)	(1,765,000)	532,000
Total other income (expense), net	(138,044,000)	(31,833,000)	251,108,000
(Loss) income before income tax (benefit) provision	234,222,000	(2,877,111,000)	710,872,000
Income tax (benefit) provision	(3,616,000)	(700,213,000)	257,670,000
Net (loss) income	$ 237,838,000	$ (2,176,898,000)	$ 453,202,000
Basic (Loss) Earnings per Share:
Net (loss) income per common share - basic	$ 1.55	$ (14.24)	$ 2.97
Fully Diluted Earnings per Share:
Net (loss) income per common share - fully diluted	$ 1.54	$ (14.24)	$ 2.94
Weighted average common shares outstanding - basic	152,963,000	152,845,000	152,754,000
Weighted average common shares outstanding - fully diluted	154,426,000	152,845,000	154,336,000