Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Total revenue	$ 338,533	$ 292,457	$ 980,839	$ 841,829
Americas:
United States	141,509	123,808	414,888	360,018
Total Americas	146,242	129,924	433,547	379,475
Other Americas [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	4,733	6,116	18,659	19,457
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	66,392	61,643	191,097	174,377
Japan [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	58,757	50,989	168,856	150,348
Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	$ 67,142	$ 49,901	$ 187,339	$ 137,629