Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 540,813	$ 517,137
Accumulated amortization	(301,696)	(364,262)
Acquired intangibles, net	239,117	152,875
In-process technology	19,500	19,500
Intangible Assets, Gross (Excluding Goodwill)	560,313	536,637
Intangible Assets, Net (Excluding Goodwill)	258,617	172,375
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	350,238	363,142
Accumulated amortization	(196,159)	(245,902)
Acquired intangibles, net	154,079	117,240
Agreements and Relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	179,985	146,395
Accumulated amortization	(99,581)	(112,565)
Acquired intangibles, net	80,404	33,830
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,590	7,600
Accumulated amortization	(5,956)	(5,795)
Acquired intangibles, net	$ 4,634	$ 1,805