Consolidated Statements Of Operations - USD ($) $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues and other income:
Oil and gas	$ 643,000	$ 557,000	$ 1,665,000	$ 1,670,000
Sales of purchased oil and gas	444,000	326,000	1,062,000	665,000
Interest and other	7,000	2,000	21,000	16,000
Derivative gains, net	91,000	573,000	(95,000)	617,000
Gain (loss) on disposition of assets, net	1,000	779,000	4,000	782,000
Total revenues and other income	1,186,000	2,237,000	2,657,000	3,750,000
Costs and expenses:
Oil and gas production	141,000	189,000	438,000	532,000
Production and ad valorem taxes	32,000	36,000	97,000	112,000
Depletion, depreciation and amortization	386,000	364,000	1,123,000	1,003,000
Purchased oil and gas	458,000	339,000	1,113,000	684,000
Impairment of oil and gas properties	0	72,000	32,000	210,000
Exploration and abandonments	19,000	25,000	96,000	79,000
General and administrative	82,000	81,000	235,000	246,000
Accretion of discount on asset retirement obligations	5,000	3,000	14,000	9,000
Interest	50,000	46,000	161,000	138,000
Other	69,000	79,000	223,000	186,000
Costs and Expenses	1,242,000	1,234,000	3,532,000	3,199,000
Income (loss) from continuing operations before income taxes	(56,000)	1,003,000	(875,000)	551,000
Income tax provision	78,000	(355,000)	362,000	(195,000)
Income from continuing operations	22,000	648,000	(513,000)	356,000
Loss from discontinued operations, net of tax	0	(2,000)	0	(6,000)
Net income			(513,000)	350,000
Net income (loss) attributable to common stockholders	$ 22,000	$ 646,000	$ (513,000)	$ 350,000
Basic earnings per share:
Income from continuing operations	$ 0.13	$ 4.29	$ (3.10)	$ 2.36
Loss from discontinued operations	0.00	(0.01)	0.00	(0.04)
Net income	0.13	4.28	(3.10)	2.32
Diluted earnings per share:
Income from continuing operations	0.13	4.28	(3.10)	2.36
Income (loss) from discontinued operations	0.00	(0.01)	0.00	(0.04)
Net income	$ 0.13	$ 4.27	$ (3.10)	$ 2.32
Weighted average shares outstanding:
Basic weighted average shares outstanding	170	149	165	149
Diluted	170	150	165	149
Dividends declared per share	$ 0.04	$ 0.04	$ 0.08	$ 0.08
Amounts attributable to common stockholders:
Net income (loss) attributable to common stockholders	$ 22,000	$ 646,000	$ (513,000)	$ 350,000