Revenue (Schedule of Net Revenue Disaggregated by Geographical Region and Sales Channel) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total net revenue	$ 229,963	$ 249,082
Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	27,484	38,294
Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	202,479	210,788
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	158,190	148,029
EMEA
Disaggregation of Revenue [Line Items]
Total net revenue	42,148	56,963
APAC
Disaggregation of Revenue [Line Items]
Total net revenue	29,625	44,090
Connected Home
Disaggregation of Revenue [Line Items]
Total net revenue	164,663	169,365
Connected Home | Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	26,687	36,818
Connected Home | Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	137,976	132,547
Connected Home | Americas
Disaggregation of Revenue [Line Items]
Total net revenue	129,164	113,687
Connected Home | EMEA
Disaggregation of Revenue [Line Items]
Total net revenue	17,971	25,690
Connected Home | APAC
Disaggregation of Revenue [Line Items]
Total net revenue	17,528	29,988
SMB
Disaggregation of Revenue [Line Items]
Total net revenue	65,300	79,717
SMB | Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	797	1,476
SMB | Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	64,503	78,241
SMB | Americas
Disaggregation of Revenue [Line Items]
Total net revenue	29,026	34,342
SMB | EMEA
Disaggregation of Revenue [Line Items]
Total net revenue	24,177	31,273
SMB | APAC
Disaggregation of Revenue [Line Items]
Total net revenue	$ 12,097	$ 14,102