Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 0	$ 0	$ (468)
Current State and Local Tax Expense (Benefit)	1,512	1,402	1,331
Current Foreign Tax Expense (Benefit)	75,580	69,905	47,540
Current Income Tax Expense (Benefit)	77,092	71,307	48,403
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	(9,111)	15,760	2,344
Deferred State and Local Income Tax Expense (Benefit)	(482)	713	1,437
Deferred Foreign Income Tax Expense (Benefit)	12,185	(12,415)	(15)
Deferred Income Tax Expense (Benefit)	2,592	4,058	3,766
Federal Income Tax Expense (Benefit), Continuing Operations	(9,111)	15,760	1,876
State and Local Income Tax Expense (Benefit), Continuing Operations	1,030	2,115	2,768
Foreign Income Tax Expense (Benefit), Continuing Operations	87,765	57,490	47,525
Provision for taxes	$ 79,684	$ 75,365	$ 52,169