Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	9 years
Intangible assets subject to amortization, Gross Amount	$ 200,223	$ 168,601
Intangible assets subject to amortization, Accumulated Amortization	(80,109)	(53,580)
Total intangible assets, Gross Amount	201,463	168,601
Amortization expense related to intangible assets	26,500	17,900	$ 14,600
Goodwill
Goodwill, Beginning Balance	228,781	228,781
Additions due to business combinations	43,941
Goodwill, Ending Balance	272,722	228,781	$ 228,781
Estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years
2016	26,677
2017	23,012
2018	20,995
2019	15,530
2020	13,298
In-process research and development
Gross carrying amount and accumulated amortization of other intangible assets
Intangible assets not subject to amortization, Gross and Net Amount	1,240
Bluegiga and Telegesis
Gross carrying amount and accumulated amortization of other intangible assets
Amount of intangible assets acquired	$ 32,900
Core and developed technology
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	9 years
Intangible assets subject to amortization, Gross Amount	$ 170,541	148,891
Intangible assets subject to amortization, Accumulated Amortization	$ (70,135)	(47,894)
Customer relationships
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	7 years
Intangible assets subject to amortization, Gross Amount	$ 23,170	14,500
Intangible assets subject to amortization, Accumulated Amortization	$ (7,259)	(4,003)
Patents
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	6 years
Intangible assets subject to amortization, Gross Amount	$ 3,022	3,000
Intangible assets subject to amortization, Accumulated Amortization	$ (1,763)	(1,250)
Trademarks
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	7 years
Intangible assets subject to amortization, Gross Amount	$ 3,490	2,210
Intangible assets subject to amortization, Accumulated Amortization	$ (952)	$ (433)