CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Sales and other operating revenues	$ 718,621	$ 1,357,905	$ 1,467,771	$ 2,639,113
Gain (loss) on sale of assets	18,246		154,123	(4,997)
Interest and other income (loss)	1,423	(8,884)	38,143	1,305
Total revenues	738,290	1,349,021	1,660,037	2,635,421
Costs and Expenses
Lease operating expenses	227,489	285,865	459,910	548,120
Severance and ad valorem taxes	19,043	28,893	39,834	55,219
Exploration expenses, including undeveloped lease amortization	64,959	134,812	193,693	273,278
Selling and general expenses	79,176	95,000	166,143	187,026
Depreciation, depletion and amortization	403,390	458,993	884,417	855,242
Accretion of asset retirement obligations	11,750	12,327	23,519	24,392
Interest expense	30,466	33,769	59,936	66,655
Interest capitalized	(1,823)	(5,053)	(3,208)	(13,921)
Other expense	13,931	(178)	63,612	636
Total costs and expenses	848,381	1,044,428	1,887,856	1,996,647
Income (loss) from continuing operations before income taxes	(110,091)	304,593	(227,819)	638,774
Income tax expense (benefit)	(21,105)	161,925	(142,363)	326,820
Income (loss) from continuing operations	(88,986)	142,668	(85,456)	311,954
Income (loss) from discontinued operations, net	15,152	(13,256)	(2,819)	(27,289)
Net Income (Loss)	$ (73,834)	$ 129,412	$ (88,275)	$ 284,665
Per Common Share - Basic
Income (loss) from continuing operations	$ (0.51)	$ 0.80	$ (0.48)	$ 1.73
Loss from discontinued operations	0.09	(0.08)	(0.02)	(0.15)
Net income (loss)	(0.42)	0.72	(0.50)	1.58
Per Common Share - Diluted
Income (loss) from continuing operations	(0.51)	0.79	(0.48)	1.72
Loss from discontinued operations	0.09	(0.07)	(0.02)	(0.15)
Net income (loss)	$ (0.42)	$ 0.72	$ (0.50)	$ 1.57
Average Common shares outstanding
Basic	174,488,842	178,500,440	176,343,309	180,003,605
Diluted	174,488,842	180,045,020	176,343,309	181,327,914