Income Tax Expense Schedule (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit) [Abstract]
U.S.	$ 12,060	$ (12,057)	$ (14,835)
Foreign	133,488	148,747	95,627
Income before taxes	145,548	136,690	80,792
U.S. federal current	(6,364)	4,798	47
U.S. state current	597	165	95
Foreign current	22,953	19,758	17,923
Total current income taxes	17,186	24,721	18,065
U.S. federal deferred	(3,981)	(2,338)
U.S. state deferred	(4,016)
Foreign deferred	5,016	1,519	(4,999)
Total deferred income taxes	(2,981)	(819)	(4,999)
Income tax expense	$ 14,205	$ 23,902	$ 13,066