CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Operating Revenues:
Gas sales	$ 614,178		$ 435,392		$ 1,118,674		$ 897,526
Gas marketing	200,979		126,688		380,820		274,739
Oil sales	2,684		1,680		8,034		4,208
Gas gathering	44,200		42,316		88,162		84,438
Total Operating Revenues	862,041		606,076		1,595,690		1,260,911
Operating Costs and Expenses:
Gas purchases - midstream services	200,110		127,614		380,066		274,290
Operating expenses	82,155		56,614		146,379		117,572
General and administrative expenses	47,570		44,932		84,785		93,758
Depreciation, depletion and amortization	186,867		207,830		366,334		401,457
Impairment of natural gas and oil properties			800,652				800,652	[1]
Taxes, other than income taxes	20,022		14,480		40,849		34,902
Total operating costs and expenses	536,724		1,252,122		1,018,413		1,722,631
Operating Income (Loss)	325,317		(646,046)	[2]	577,277		(461,720)	[2]
Interest Expense:
Interest on debt	25,049		23,956		49,146		43,691
Other interest charges	1,044		1,047		2,154		2,038
Interest capitalized	(16,815)		(16,642)		(33,001)		(30,030)
Total Interest Expense	9,278	[1]	8,361	[1]	18,299	[1]	15,699	[1]
Other Gain (Loss), Net	354	[1]	2,577	[1]	(179)	[1]	2,377	[1]
Gain (Loss) on Derivatives	93,449		(6,348)		63,655		(4,714)
Income (Loss) Before Income Taxes	409,842		(658,178)		622,454		(479,756)
Provision for Income Taxes:
Current	16,334		100		16,470		268
Deferred	147,877		(253,146)		232,838		(182,596)
Total provision for income taxes	164,211	[1]	(253,046)	[1]	249,308	[1]	(182,328)	[1]
Net Income (Loss)	$ 245,631		$ (405,132)		$ 373,146		$ (297,428)
Earnings (Loss) Per Share:
Basic	$ 0.70		$ (1.16)		$ 1.07		$ (0.85)
Diluted	$ 0.70		$ (1.16)		$ 1.06		$ (0.85)
Weighted Average Common Shares Outstanding:
Basic	350,448,806		348,162,723		350,241,768		348,081,399
Diluted	351,082,807	[3]	348,162,723	[3]	350,911,892	[3]	348,081,399	[3]

[1] Interest expense and the provision for income taxes by segment are allocated as they are incurred at the corporate level.

[2] The operating loss for the E&P segment for the three and six months ended June 30, 2012 includes a $800.7 million non-cash ceiling test impairment of our natural gas and oil properties.

[3] Options for 1,599,246 shares and 29,251 shares of restricted stock were excluded from the calculation for the three months ended June 30, 2013 because they would have had an antidilutive effect. Due to the net loss for the three months ended June 30, 2012, options for 1,723,316 shares and 156,047 shares of restricted stock were antidilutive and excluded from the calculation. Options for 2,079,849 shares and 246,347 shares of restricted stock were excluded from the calculation for the six months ended June 30, 2013 because they would have had an antidilutive effect. Due to the net loss for the six months ended June 30, 2012, options for 1,783,073 shares and 121,078 shares of restricted stock were antidilutive and excluded from the calculation.