Segment Reporting Schedule of Revenue from External Customers by Geographical Regions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 192,141	$ 200,951	$ 391,531	$ 380,629
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	95,985	101,165	192,699	192,835
Europe, Middle East and Africa (EMEA) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	62,607	55,920	134,922	110,505
Latin America and Mexico (LATAM) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	21,476	26,636	42,515	46,499
Asia Pacific (ASIAPAC) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 12,073	$ 17,230	$ 21,395	$ 30,790