Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Apr. 02, 2016	Jan. 02, 2016
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 508,299	$ 513,071
Accumulated amortization	(224,474)	(216,589)
Acquired intangibles, net	283,825	296,482
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	326,359	329,627
Accumulated amortization	(129,967)	(124,097)
Acquired intangibles, net	196,392	205,530
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	172,234	173,325
Accumulated amortization	(88,813)	(86,808)
Acquired intangibles, net	83,421	86,517
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	9,706	10,119
Accumulated amortization	(5,694)	(5,684)
Acquired intangibles, net	$ 4,012	$ 4,435