Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues and other income:
Oil and gas	$ 641,737	$ 562,412	$ 1,360,693	$ 1,038,140
Interest and other	6,043	13,594	34,491	42,067
Derivative gains (losses), net	275,812	229,478	367,562	(14,954)
Gain (loss) on disposition of assets, net	1,140	(296)	44,736	(2,487)
Total revenues and other income	924,732	805,188	1,807,482	1,062,766
Costs and expenses:
Oil and gas production	156,838	101,741	295,159	200,576
Production and ad valorem taxes	44,495	35,864	90,291	69,160
Depletion, depreciation and amortization	200,921	135,511	382,339	258,345
Impairment of oil and gas properties	444,880	0	444,880	0
Exploration and abandonments	37,178	19,732	90,465	37,216
General and administrative	54,957	44,339	118,024	88,250
Accretion of discount on asset retirement obligations	2,444	2,048	4,874	4,092
Interest	49,008	44,995	95,866	90,222
Hurricane activity, net	0	(2)	0	69
Other	30,651	12,053	54,258	29,914
Costs and expenses, Total	1,021,372	396,281	1,576,156	777,844
Income (loss) from continuing operations before income taxes	(96,640)	408,907	231,326	284,922
Income tax benefit (provision)	45,086	(140,182)	(72,617)	(92,275)
Income (loss) from continuing operations	(51,554)	268,725	158,709	192,647
Income (loss) from discontinued operations, net of tax	12,017	(3,025)	22,712	416,857
Net income (loss)	(39,537)	265,700	181,421	609,504
Net income attributable to noncontrolling interests	(30,855)	(20,123)	(37,194)	(15,333)
Net income (loss) attributable to common stockholders	(70,392)	245,577	144,227	594,171
Basic earnings per share:
Income (loss) from continuing operations attributable to common stockholders	$ (0.67)	$ 2.10	$ 0.98	$ 1.50
Income (loss) from discontinued operations attributable to common stockholders	$ 0.10	$ (0.03)	$ 0.18	$ 3.53
Net income (loss) attributable to common stockholders	$ (0.57)	$ 2.07	$ 1.16	$ 5.03
Diluted earnings per share:
Income (loss) from continuing operations attributable to common stockholders	$ (0.67)	$ 2.06	$ 0.95	$ 1.46
Income (loss) from discontinued operations attributable to common stockholders	$ 0.10	$ (0.03)	$ 0.18	$ 3.44
Net income (loss) attributable to common stockholders	$ (0.57)	$ 2.03	$ 1.13	$ 4.90
Weighted average shares outstanding:
Basic	123,028	116,213	122,754	116,042
Diluted	123,028	118,592	125,772	118,986
Dividends declared per share	$ 0.00	$ 0.00	$ 0.04	$ 0.04
Amounts attributable to common stockholders:
Income (loss) from continuing operations	(82,409)	248,602	121,515	177,314
Income (loss) from discontinued operations, net of tax	12,017	(3,025)	22,712	416,857
Net income (loss)	$ (70,392)	$ 245,577	$ 144,227	$ 594,171