Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues and other income:
Oil and gas	$ 583,931	$ 422,042	$ 1,081,061	$ 894,087
Interest and other	18,454	16,952	51,141	34,960
Gain (loss) on disposition of assets, net	(296)	7,645	(2,487)	24,588
Revenues and other income	602,089	446,639	1,129,715	953,635
Costs and expenses:
Oil and gas production	102,455	94,012	202,386	180,112
Production and ad valorem taxes	35,864	25,338	69,160	52,399
Depletion, depreciation and amortization	153,898	144,309	294,271	288,737
Exploration and abandonments	19,914	22,743	37,557	39,591
General and administrative	44,644	40,433	88,750	78,748
Accretion of discount on asset retirement obligations	2,658	2,529	5,313	5,388
Interest	45,768	45,368	90,995	92,891
Hurricane activity, net	(2)	5,184	69	(2,226)
Derivative (gains) losses, net	(229,478)	(177,528)	14,954	(443,004)
Other	14,388	14,193	32,269	30,139
Costs and expenses, Total	190,109	216,581	835,724	322,775
Income from continuing operations before income taxes	411,980	230,058	293,991	630,860
Income tax provision	(144,696)	(83,220)	(97,545)	(227,227)
Income from continuing operations	267,284	146,838	196,446	403,633
Income (loss) from discontinued operations, net of tax	(1,584)	41,851	413,058	45,662
Net income	265,700	188,689	609,504	449,295
Net income attributable to the noncontrolling interests	(20,123)	(21,113)	(15,333)	(36,465)
Net income attributable to common stockholders	245,577	167,576	594,171	412,830
Basic earnings per share:
Income from continuing operations attributable to common stockholders	$ 2.08	$ 1.07	$ 1.53	$ 3.12
Income (loss) from discontinued operations attributable to common stockholders	$ (0.01)	$ 0.35	$ 3.50	$ 0.39
Net income attributable to common stockholders	$ 2.07	$ 1.42	$ 5.03	$ 3.51
Diluted earnings per share:
Income from continuing operations attributable to common stockholders	$ 2.04	$ 1.06	$ 1.50	$ 3.10
Income (loss) from discontinued operations attributable to common stockholders	$ (0.01)	$ 0.35	$ 3.40	$ 0.39
Net income attributable to common stockholders	$ 2.03	$ 1.41	$ 4.90	$ 3.49
Weighted average shares outstanding:
Basic	116,213	115,104	116,042	114,880
Diluted	118,592	116,006	118,986	115,735
Dividends declared per share			$ 0.04	$ 0.04
Amounts attributable to common stockholders:
Income from continuing operations	247,161	125,725	181,113	367,168
Income (loss) from discontinued operations, net of tax	(1,584)	41,851	413,058	45,662
Net income	$ 245,577	$ 167,576	$ 594,171	$ 412,830