Consolidated Statements Of Operations - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues and other income:
Oil and gas	$ 613,000	$ 596,000	$ 1,022,000	$ 1,113,000
Sales of purchased oil and gas	395,000	236,000	618,000	339,000
Interest and other	6,000	7,000	13,000	14,000
Derivative gains, net	(229,000)	(197,000)	(186,000)	44,000
Gain (loss) on disposition of assets, net	1,000	2,000	3,000	3,000
Total revenues and other income	786,000	644,000	1,470,000	1,513,000
Costs and expenses:
Oil and gas production	141,000	163,000	297,000	343,000
Production and ad valorem taxes	36,000	37,000	65,000	76,000
Depletion, depreciation and amortization	384,000	329,000	737,000	639,000
Purchased oil and gas	410,000	237,000	653,000	345,000
Impairment of oil and gas properties	0	0	32,000	138,000
Exploration and abandonments	18,000	28,000	77,000	54,000
General and administrative	80,000	83,000	154,000	165,000
Accretion of discount on asset retirement obligations	5,000	3,000	9,000	6,000
Interest	56,000	46,000	111,000	92,000
Other	67,000	58,000	154,000	107,000
Costs and Expenses	1,197,000	984,000	2,289,000	1,965,000
Income from continuing operations before income taxes	(411,000)	(340,000)	(819,000)	(452,000)
Income tax provision	143,000	123,000	284,000	160,000
Income from continuing operations	(268,000)	(217,000)	(535,000)	(292,000)
Loss from discontinued operations, net of tax	0	(1,000)	0	(4,000)
Net income			(535,000)	(296,000)
Net income (loss) attributable to common stockholders	$ (268,000)	$ (218,000)	$ (535,000)	$ (296,000)
Basic earnings per share:
Income from continuing operations	$ (1.63)	$ (1.45)	$ (3.28)	$ (1.95)
Loss from discontinued operations	0.00	(0.01)	0.00	(0.03)
Net income	(1.63)	(1.46)	(3.28)	(1.98)
Diluted earnings per share:
Income from continuing operations	(1.63)	(1.45)	(3.28)	(1.95)
Loss from discontinued operations	0.00	(0.01)	0.00	(0.03)
Net income	$ (1.63)	$ (1.46)	$ (3.28)	$ (1.98)
Weighted average shares outstanding:
Basic	164	149	163	149
Diluted	164	149	163	149
Dividends declared per share	$ 0.00	$ 0.00	$ 0.04	$ 0.04
Amounts attributable to common stockholders:
Net income (loss) attributable to common stockholders	$ (268,000)	$ (218,000)	$ (535,000)	$ (296,000)