Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 18, 2018	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Goodwill
Goodwill, Beginning Balance		$ 288,227	$ 276,130
Additions due to business combinations		109,117	12,097
Goodwill, Ending Balance		$ 397,344	$ 288,227	$ 276,130
Other Intangible Assets
Weighted-Average Amortization Period (Years)		8 years	8 years
Intangible assets subject to amortization, Gross Amount		$ 296,465	$ 193,860
Intangible assets subject to amortization, Accumulated Amortization		(125,633)	(110,716)
Amortization expense related to intangible assets		38,000	$ 27,100	$ 27,300
Estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years
2019		39,222
2020		36,727
2021		32,337
2022		24,206
2023		$ 18,286
Core and developed technology
Other Intangible Assets
Weighted-Average Amortization Period (Years)		8 years	8 years
Intangible assets subject to amortization, Gross Amount		$ 237,265	$ 161,700
Intangible assets subject to amortization, Accumulated Amortization		$ (102,116)	$ (89,442)
Customer relationships
Other Intangible Assets
Weighted-Average Amortization Period (Years)		5 years	5 years
Intangible assets subject to amortization, Gross Amount		$ 46,890	$ 25,470
Intangible assets subject to amortization, Accumulated Amortization		$ (21,075)	(16,180)
Patents
Other Intangible Assets
Intangible assets subject to amortization, Gross Amount			3,000
Intangible assets subject to amortization, Accumulated Amortization			$ (2,750)
Trademarks
Other Intangible Assets
Weighted-Average Amortization Period (Years)		7 years	7 years
Intangible assets subject to amortization, Gross Amount		$ 12,310	$ 3,690
Intangible assets subject to amortization, Accumulated Amortization		(2,442)	$ (2,344)
Z-Wave
Goodwill
Goodwill, Ending Balance	$ 109,117
Other Intangible Assets
Gross intangible assets acquired		125,700
Removal of fully amortized intangible assets		$ 23,100
Z-Wave | Customer relationships
Other Intangible Assets
Weighted-Average Amortization Period (Years)	4 years
Z-Wave | Trademarks
Other Intangible Assets
Weighted-Average Amortization Period (Years)	7 years