Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount		$ 517,137
Accumulated amortization	$ (317,754)	(364,262)
Acquired intangibles, net	242,543	152,875
In-process technology		19,500
Intangible Assets, Gross (Excluding Goodwill)	560,297	536,637
Intangible Assets, Net (Excluding Goodwill)	242,543	172,375
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	369,738	363,142
Accumulated amortization	(207,374)	(245,902)
Acquired intangibles, net	162,364	117,240
Agreements and Relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	179,969	146,395
Accumulated amortization	(104,159)	(112,565)
Acquired intangibles, net	75,810	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	(6,221)	(5,795)
Acquired intangibles, net	$ 4,369	$ 1,805