Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Segment Reporting Information [Line Items]
Total net revenue	$ 366,820	$ 330,723	$ 711,793	$ 654,380
United States (U.S.)
Segment Reporting Information [Line Items]
Total net revenue	252,305	221,387	480,800	427,512
Americas (excluding U.S.)
Segment Reporting Information [Line Items]
Total net revenue	7,521	5,562	12,646	11,066
EMEA
Segment Reporting Information [Line Items]
Total net revenue	68,681	55,204	135,310	113,649
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total net revenue	$ 38,313	$ 48,570	$ 83,037	$ 102,153