Segment Information and Operations By Geographic Area (Schedule Of Net Revenue By Geography Periods) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Segment Reporting Information [Line Items]
Total net revenues	$ 311,655	$ 288,782	$ 621,911	$ 597,939
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	203,508	168,282	392,874	338,874
Americas Excluding United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	7,400	4,177	11,884	7,371
EMEA [Member]
Segment Reporting Information [Line Items]
Total net revenues	51,653	67,993	116,158	157,102
AUSTRALIA
Segment Reporting Information [Line Items]
Total net revenues	28,851	31,008	59,984	60,661
Asia Pacific excluding Australia [Member]
Segment Reporting Information [Line Items]
Total net revenues	$ 20,243	$ 17,322	$ 41,011	$ 33,931