Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Total revenue	$ 1,149,835	$ 935,954	$ 852,632
Americas:
United States	489,438	382,692	370,016
Other Americas	25,152	22,218	20,925
Total Americas	514,590	404,910	390,941
Total Europe, Middle East and Africa [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries	234,880	207,216	188,933
Germany [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries	43,006	58,942	48,326
Other Europe, Middle East and Africa [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries	191,874	148,274	140,607
Japan [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries	204,388	165,155	152,738
Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries	$ 195,977	$ 158,673	$ 120,020