Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Total revenue	$ 326,476	$ 283,270	$ 642,306	$ 549,372
Americas:
United States	142,925	124,191	273,380	236,210
Total Americas	148,727	132,391	287,306	249,551
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	64,996	56,458	124,705	112,734
Japan [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	53,880	49,194	110,099	99,359
Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	58,873	45,227	120,196	87,728
Other Americas [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	$ 5,802	$ 8,200	$ 13,926	$ 13,341