CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Operating Revenues:
Gas sales	$ 617,427		$ 497,219		$ 1,736,101		$ 1,394,745
Gas marketing	201,112		148,764		581,932		423,503
Oil sales	4,397		1,889		12,431		6,097
Gas gathering	45,430		43,855		133,592		128,293
Total Operating Revenues	868,366		691,727		2,464,056		1,952,638
Operating Costs and Expenses:
Gas purchases - midstream services	195,271		149,651		575,337		423,941
Operating expenses	90,269		61,906		236,648		179,478
General and administrative expenses	50,969		36,121		135,754		129,879
Depreciation, depletion and amortization	204,934		203,935		571,268		605,392
Impairment of natural gas and oil properties			289,821				1,090,473	[1]
Taxes, other than income taxes	17,694		16,252		58,543		51,154
Total operating costs and expenses	559,137		757,686		1,577,550		2,480,317
Operating Income (loss)	309,229		(65,959)		886,506		(527,679)	[2]
Interest Expense:
Interest on debt	25,435		25,463		74,581		69,154
Other interest charges	1,049		1,058		3,203		3,096
Interest capitalized	(15,466)		(15,915)		(48,467)		(45,945)
Total Interest Expense	11,018		10,606		29,317	[1]	26,305	[1]
Other Gain (Loss), Net	(319)		238	[2]	(498)	[1]	2,615	[1]
Gain (Loss) on Derivatives	12,124	[1]	(5,879)	[1]	75,779		(10,593)
Income (Loss) before income taxes	310,016		(82,206)		932,470		(561,962)
Provision for Income Taxes:
Current	(16,068)		101		402		369
Deferred	140,217		(28,254)		373,055		(210,850)
Total provision for income taxes	124,149	[1]	(28,153)	[1]	373,457	[1]	(210,481)	[1]
Net Income (Loss)	$ 185,867		$ (54,053)		$ 559,013		$ (351,481)
Earnings (Loss) Per Share:
Basic	$ 0.53		$ (0.16)		$ 1.60		$ (1.01)
Diluted	$ 0.53		$ (0.16)		$ 1.59		$ (1.01)
Weighted Average Common Shares Outstanding:
Basic	350,517,337		348,649,630		350,334,634		348,272,192
Diluted	351,222,830	[3]	348,649,630	[3]	351,014,974	[3]	348,272,192	[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 nine months ended September 30, 2012 includes a $289.8 million and $1,090.5 million non-cash ceiling test impairment of our natural gas and oil properties respectively.

[3] Options for 1,550,838 shares and 15,703 shares of restricted stock were excluded from the calculation for the three months ended September 30, 2013 because they would have had an antidilutive effect. Due to the net loss for the three months ended September 30, 2012, options for 1,664,232 shares and 560,848 shares of restricted stock were antidilutive and excluded from the calculation. Options for 1,848,566 shares and 169,261 shares of restricted stock were excluded from the calculation for the nine months ended September 30, 2013 because they would have had an antidilutive effect. Due to the net loss for the nine months ended September 30, 2012, options for 1,685,398 shares and 580,227 shares of restricted stock were antidilutive and excluded from the calculation.