Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total net revenue	$ 252,971	$ 265,858	$ 230,852	$ 249,082	$ 288,928	$ 269,411	$ 255,276	$ 245,201	$ 998,763	$ 1,058,816	$ 1,039,169
United States (U.S.)
Segment Reporting Information [Line Items]
Total net revenue									637,566	686,145	648,152
Americas (excluding U.S.)
Segment Reporting Information [Line Items]
Total net revenue									15,440	14,548	16,937
EMEA
Segment Reporting Information [Line Items]
Total net revenue									200,099	207,599	197,074
APAC
Segment Reporting Information [Line Items]
Total net revenue									$ 145,658	$ 150,524	$ 177,006