Revenue (Schedule of Net Revenue Disaggregated by Geographical Region and Sales Channel) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Disaggregation of Revenue [Line Items]
Total net revenue	$ 378,114	$ 265,858	$ 888,129	$ 745,792
Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	74,055	36,454	146,562	102,571
Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	304,059	229,404	741,567	643,221
Connected Home
Disaggregation of Revenue [Line Items]
Total net revenue	316,739	190,672	711,419	527,532
Connected Home | Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	73,343	35,482	144,182	99,201
Connected Home | Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	243,396	155,190	567,237	428,331
SMB
Disaggregation of Revenue [Line Items]
Total net revenue	61,375	75,186	176,710	218,260
SMB | Service provider
Disaggregation of Revenue [Line Items]
Total net revenue	712	972	2,380	3,370
SMB | Non-service provider
Disaggregation of Revenue [Line Items]
Total net revenue	60,663	74,214	174,330	214,890
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	277,891	178,679	638,327	483,878
Americas | Connected Home
Disaggregation of Revenue [Line Items]
Total net revenue	248,888	146,806	557,862	392,162
Americas | SMB
Disaggregation of Revenue [Line Items]
Total net revenue	29,003	31,873	80,465	91,716
EMEA
Disaggregation of Revenue [Line Items]
Total net revenue	63,705	49,554	154,212	149,608
EMEA | Connected Home
Disaggregation of Revenue [Line Items]
Total net revenue	42,760	22,190	91,934	65,406
EMEA | SMB
Disaggregation of Revenue [Line Items]
Total net revenue	20,945	27,364	62,278	84,202
APAC
Disaggregation of Revenue [Line Items]
Total net revenue	36,518	37,625	95,590	112,306
APAC | Connected Home
Disaggregation of Revenue [Line Items]
Total net revenue	25,091	21,676	61,623	69,964
APAC | SMB
Disaggregation of Revenue [Line Items]
Total net revenue	$ 11,427	$ 15,949	$ 33,967	$ 42,342