Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 0	$ 0	$ 0
Current State and Local Tax Expense (Benefit)	1,372	1,512	1,402
Current Foreign Tax Expense (Benefit)	84,962	75,580	69,905
Current Income Tax Expense (Benefit)	86,334	77,092	71,307
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	12,341	(9,111)	15,760
Deferred State and Local Income Tax Expense (Benefit)	87	(482)	713
Deferred Foreign Income Tax Expense (Benefit)	(7,008)	12,185	(12,415)
Deferred Income Tax Expense (Benefit)	5,420	2,592	4,058
Federal Income Tax Expense (Benefit), Continuing Operations	12,341	(9,111)	15,760
State and Local Income Tax Expense (Benefit), Continuing Operations	1,459	1,030	2,115
Foreign Income Tax Expense (Benefit), Continuing Operations	77,954	87,765	57,490
Provision for taxes	$ 91,754	$ 79,684	$ 75,365