Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 487,744	$ 504,791
Accumulated amortization	(320,859)	(297,456)
Acquired intangibles, net	166,885	207,335
In-process technology	71,500	71,500
Intangible Assets, Gross (Excluding Goodwill)	559,244	576,291
Intangible Assets, Net (Excluding Goodwill)	238,385	278,835
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	330,667	342,810
Accumulated amortization	(216,345)	(199,529)
Acquired intangibles, net	114,322	143,281
Agreements and Relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	146,359	151,063
Accumulated amortization	(96,632)	(90,675)
Acquired intangibles, net	49,727	60,388
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,718	10,918
Accumulated amortization	(7,882)	(7,252)
Acquired intangibles, net	$ 2,836	$ 3,666