CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Sales and other operating revenues	$ 749,150	$ 1,281,208
Gain on sale of assets	135,877	19
Interest and other income	36,720	5,173
Total revenues	921,747	1,286,400
Costs and Expenses
Lease operating expenses	232,421	262,255
Severance and ad valorem taxes	20,791	26,326
Exploration expenses, including undeveloped lease amortization	128,734	138,466
Selling and general expenses	86,967	92,026
Depreciation, depletion and amortization	481,027	396,249
Accretion of asset retirement obligations	11,769	12,065
Interest expense	29,470	32,886
Interest capitalized	(1,385)	(8,868)
Other expense	49,681	814
Total costs and expenses	1,039,475	952,219
Income (loss) from continuing operations before income taxes	(117,728)	334,181
Income tax expense (benefit)	(121,258)	164,895
Income from continuing operations	3,530	169,286
Loss from discontinued operations, net of taxes	(17,971)	(14,033)
Net Income (Loss)	$ (14,441)	$ 155,253
Per Common Share - Basic
Income from continuing operations	$ 0.02	$ 0.94
Loss from discontinued operations	$ (0.10)	$ (0.08)
Net income (loss)	$ (0.08)	$ 0.86
Per Common Share - Diluted
Income from continuing operations	$ 0.02	$ 0.93
Loss from discontinued operations	$ (0.10)	$ (0.08)
Net income (loss)	$ (0.08)	$ 0.85
Average Common shares outstanding
Basic	177,734,159	181,367,565
Diluted	178,241,616	182,576,570