Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income before income taxes:
United States	$ 176,739	$ 225,334	$ 98,170
Foreign	540,013	438,354	348,357
Income before income taxes	716,752	663,688	446,527
Current tax provision:
United States	44,769	77,590	38,621
Foreign	128,608	79,607	89,969
Provision for income taxes, current	173,377	157,197	128,590
Deferred tax provision (benefit):
United States	17,733	3,020	(2,295)
Foreign	(3,200)	1,058	(6,984)
Provision for income taxes, deferred	14,533	4,078	(9,279)
Provision for income taxes	187,910	161,275	119,311
Foreign tax loss and credit carryforwards	56,138
State tax credit carry forwards, net of federal benefit	3,547
Foreign tax losses and credit carry forwards that expire or will be refunded at various dates through 2025	34,774
State tax credit carry forwards, net of federal benefits that expire or will be refunded at various dates through 2025	270
Valuation allowance, related to the foreign net operating loss carryforwards and U.S. state tax credits	19,129	20,091
Change in the valuation allowance, related to foreign net operating loss and foreign and U.S. state credit carryforwards	$ (962)	$ 6,275