Segment Information, Operations By Geographic Area And Customer Concentration (Schedule Of Net Revenue By Geography Periods) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Segment Reporting Information [Line Items]
Total net revenues	$ 325,620	$ 278,823
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	164,745	127,764
Americas Excluding United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	3,610	4,183
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues	49,394	46,633
EMEA Excluding United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues	75,687	75,987
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total net revenues	$ 32,184	$ 24,256