Segment Reporting Schedule of Revenue from External Customers by Geographical Regions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 199,391	$ 179,678
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	96,714	91,670
Europe, Middle East and Africa (EMEA) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	72,315	54,585
Latin America and Mexico (LATAM) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	21,039	19,863
Asia Pacific (ASIAPAC) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 9,323	$ 13,560