CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Sales and other operating revenues	$ 411,217	$ 718,621	$ 840,311	$ 1,467,771
Gain on sale of assets	3,809	18,246	3,831	154,123
Interest and other income	22,436	1,423	23,615	38,143
Total revenues	437,462	738,290	867,757	1,660,037
Costs and Expenses
Lease operating expenses	156,530	227,489	315,633	459,910
Severance and ad valorem taxes	13,439	19,043	26,076	39,834
Exploration expenses, including undeveloped lease amortization	37,128	64,959	64,044	193,693
Selling and general expenses	67,113	79,176	140,620	166,143
Depreciation, depletion and amortization	255,239	403,390	541,388	884,417
Impairment of assets			95,088
Accretion of asset retirement obligations	12,346	11,750	24,471	23,519
Interest expense	35,058	30,466	67,119	59,936
Interest capitalized	(608)	(1,823)	(2,449)	(3,208)
Other expense (benefit)	(7,516)	13,931	(7,932)	63,612
Total costs and expenses	568,729	848,381	1,264,058	1,887,856
Loss from continuing operations before income taxes	(131,267)	(110,091)	(396,301)	(227,819)
Income tax benefit	(134,172)	(21,105)	(199,721)	(142,363)
Income (loss) from continuing operations	2,905	(88,986)	(196,580)	(85,456)
Income (loss) from discontinued operations, net of income taxes	25	15,152	708	(2,819)
Net Loss	$ 2,930	$ (73,834)	$ (195,872)	$ (88,275)
Per Common Share - Basic
Income (loss) from continuing operations	$ 0.02	$ (0.51)	$ (1.14)	$ (0.48)
Income (loss) from discontinued operations		0.09		(0.02)
Net income (loss)	0.02	(0.42)	(1.14)	(0.50)
Per Common Share - Diluted
Income (loss) from continuing operations	0.02	(0.51)	(1.14)	(0.48)
Income (loss) from discontinued operations		0.09		(0.02)
Net income (loss)	$ 0.02	$ (0.42)	$ (1.14)	$ (0.50)
Average Common shares outstanding
Basic	172,196,914	174,488,842	172,149,791	176,343,309
Diluted	172,799,827	174,488,842	172,149,791	176,343,309