Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income before income taxes:
United States	$ 152,851	$ 145,856	$ 176,739
Foreign	693,794	632,985	540,013
Income before income taxes	846,645	778,841	716,752
Current tax provision:
United States	47,526	54,649	44,769
Foreign	162,282	163,060	128,608
Provision for income taxes, current	209,808	217,709	173,377
Deferred tax provision (benefit):
United States	(134)	7,749	17,733
Foreign	(1,778)	(6,125)	(3,200)
Provision for income taxes, deferred	(1,912)	1,624	14,533
Provision for income taxes	207,896	219,333	187,910
Foreign tax loss and credit carryforwards	61,473
State tax credit carry forwards, net of federal benefit	3,897
Foreign tax losses and credit carry forwards that will either expire or be refunded at various dates through 2028	39,689
State tax credit carry forwards, net of federal benefits will either expire or be refunded at various dates through 2028	54
Valuation allowance, related to the foreign net operating loss carryforwards and U.S. state tax credits	19,400	17,896
Change in the valuation allowance, related to foreign net operating loss and foreign and U.S. state credit carryforwards	$ 1,504	$ (1,233)