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Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Sep. 28, 2019	Dec. 29, 2018
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 517,156	$ 487,644
Accumulated amortization	(351,619)	(333,687)
Acquired intangibles, net	165,537	153,957
In-process technology	19,500	71,500
Intangible Assets, Gross (Excluding Goodwill)	536,656	559,144
Intangible Assets, Net (Excluding Goodwill)	185,037	225,457
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	363,142	330,500
Accumulated amortization	(236,297)	(225,383)
Acquired intangibles, net	126,845	105,117
Agreements and Relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	146,414	146,426
Accumulated amortization	(109,729)	(100,211)
Acquired intangibles, net	36,685	46,215
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	7,600	10,718
Accumulated amortization	(5,593)	(8,093)
Acquired intangibles, net	$ 2,007	$ 2,625

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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+ References

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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