Segment Reporting Schedule of Revenue from External Customers by Geographical Regions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 192,821	$ 211,805	$ 573,450	$ 611,406
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	104,008	107,073	296,843	292,608
Europe, Middle East and Africa (EMEA) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	50,184	64,710	160,689	200,635
Latin America and Mexico (LATAM) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	27,365	23,648	73,864	69,994
Asia Pacific (ASIAPAC) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 11,264	$ 16,374	$ 42,054	$ 48,169