Goodwill and Other Intangible Assets (Details) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Goodwill
Goodwill, Beginning Balance	$ 228,781,000	$ 130,265,000
Additions due to business combinations		98,516,000
Goodwill, Ending Balance	228,781,000	228,781,000	130,265,000
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	9 years
Intangible assets subject to amortization, Gross Amount	168,601,000	158,050,000
Intangible assets subject to amortization, Accumulated Amortization	(53,580,000)	(45,057,000)
Total intangible assets, Gross Amount	168,601,000	176,650,000
Fully amortized intangible assets, gross	9,400,000
Amortization expense related to intangible assets	17,900,000	14,600,000	10,700,000
Estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years
2015	19,331,000
2016	18,682,000
2017	17,715,000
2018	16,690,000
2019	14,251,000
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		18,600,000
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	148,891,000	138,340,000
Intangible assets subject to amortization, Accumulated Amortization	(47,894,000)	(41,782,000)
Customer relationships
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	9 years
Intangible assets subject to amortization, Gross Amount	14,500,000	14,500,000
Intangible assets subject to amortization, Accumulated Amortization	(4,003,000)	(2,330,000)
Patents
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	6 years
Intangible assets subject to amortization, Gross Amount	3,000,000	3,000,000
Intangible assets subject to amortization, Accumulated Amortization	(1,250,000)	(750,000)
Trademarks
Gross carrying amount and accumulated amortization of other intangible assets
Weighted-Average Amortization Period	10 years
Intangible assets subject to amortization, Gross Amount	2,210,000	2,210,000
Intangible assets subject to amortization, Accumulated Amortization	$ (433,000)	$ (195,000)