Consolidated Statement Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interests [Member]	Total
Beginning Balance at Dec. 31, 2010	$ 1,262	$ 3,022,768	$ (421,235)	$ 1,510,427	$ 7,361	$ 105,442	$ 4,226,025
Beginning Balance (in shares) at Dec. 31, 2010	115,309,000
Dividends declared ($0.04 per share)				(4,739)			(4,739)
Exercise of long-term incentive plan stock options (in shares)	16,000
Exercise of long-term incentive plan stock options			598	(236)			362
Treasury stock purchases (in shares)	(424,000)
Treasury stock purchases			(39,020)			(198)	(39,218)
Tax benefit related to stock-based compensation		27,937					27,937
Disposition of subsidiary		(508)					(508)
Compensation costs:
Vested compensation awards, net (in shares)	1,343,000
Vested compensation awards, net	14	(14)
Compensation costs included in net income		20,644				632	21,276
Cash distributions to noncontrolling interests						(13,366)	(13,366)
Net income				594,171		15,333	609,504
Deferred hedging activity, net of tax:
Net hedge gains included in continuing operations					(4,498)	(6,811)	(11,309)
Ending Balance at Jun. 30, 2011	$ 1,276	$ 3,070,827	$ (459,657)	$ 2,099,623	$ 2,863	$ 101,032	$ 4,815,964
Ending Balance (in shares) at Jun. 30, 2011	116,244,000