Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Segment Reporting Information [Line Items]
Total net revenue	$ 344,973	$ 323,657
United States (U.S.)
Segment Reporting Information [Line Items]
Total net revenue	228,495	206,125
Americas (excluding U.S.)
Segment Reporting Information [Line Items]
Total net revenue	5,125	5,504
EMEA
Segment Reporting Information [Line Items]
Total net revenue	66,629	58,445
Australia
Segment Reporting Information [Line Items]
Total net revenue	23,676	33,481
APAC (excluding Australia)
Segment Reporting Information [Line Items]
Total net revenue	$ 21,048	$ 20,102