CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Operating Revenues:
Gas sales	$ 793,352		$ 504,496
Gas marketing	272,161		179,841
Oil sales	2,048		5,350
Gas gathering	45,216		43,962
Total Operating Revenues	1,112,777		733,649
Operating Costs and Expenses:
Gas purchases - midstream services	271,120		179,956
Operating expenses	100,153		64,224
General and administrative expenses	56,387		37,215
Depreciation, depletion and amortization	225,076		179,467
Taxes, other than income taxes	25,422		20,827
Total Operating Costs and Expenses	678,158		481,689
Operating Income	434,619		251,960	[1]
Interest Expense:
Interest on debt	25,229		24,097
Other interest charges	1,062		1,110
Interest capitalized	(13,384)		(16,186)
Total Interest Expense	12,907	[1]	9,021	[1]
Other Gain (Loss), Net	1,193		(533)
Loss on Derivatives	(99,720)		(29,794)
Income Before Income Taxes	323,185		212,612
Provision for Income Taxes:
Current	(520)		136
Deferred	129,515		84,961
Total Provision for Income Taxes	128,995	[1]	85,097	[1]
Net Income	$ 194,190		$ 127,515
Earnings Per Share:
Basic	$ 0.55		$ 0.36
Diluted	$ 0.55		$ 0.36
Weighted Average Common Shares Outstanding:
Basic	351,222,538		350,032,430
Diluted	351,985,821	[2]	350,738,309	[2]

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

[2] Options for 1,179,914 shares and 29,688 shares of restricted stock were excluded from the calculation for the three months ended March 31, 2014 because they would have had an antidilutive effect. Options for 2,112,679 shares and 271,674 shares of restricted stock were excluded from the calculation for the three months ended March 31, 2013 because they would have had an antidilutive effect.