Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 504,791
Accumulated amortization	(297,456)	$ (267,723)
Acquired intangibles, net	207,335
In-process technology	71,500
Intangible Assets, Gross (Excluding Goodwill)	576,291	526,537
Intangible Assets, Net (Excluding Goodwill)	278,835	258,814
Existing technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	342,810	342,108
Accumulated amortization	(199,529)	(160,178)
Acquired intangibles, net	143,281	181,930
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	151,063	174,623
Accumulated amortization	(90,675)	(100,778)
Acquired intangibles, net	60,388	73,845
Tradenames, trademarks and patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,918	9,806
Accumulated amortization	(7,252)	(6,767)
Acquired intangibles, net	$ 3,666	$ 3,039