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Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands | Dec. 29, 2018 | Dec. 30, 2017
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Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year |  |
Gross carrying amount | $ 487,644 | $ 504,791
Accumulated amortization | (333,687) | (297,456)
Acquired intangibles, net | 153,957 | 207,335
In-process technology | 71,500 | 71,500
Intangible Assets, Gross (Excluding Goodwill) | 559,144 | 576,291
Intangible Assets, Net (Excluding Goodwill) | 225,457 | 278,835
Existing technology [Member] |  |
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year |  |
Gross carrying amount | 330,500 | 342,810
Accumulated amortization | (225,383) | (199,529)
Acquired intangibles, net | 105,117 | 143,281
Agreements and relationships [Member] |  |
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year |  |
Gross carrying amount | 146,426 | 151,063
Accumulated amortization | (100,211) | (90,675)
Acquired intangibles, net | 46,215 | 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 | (8,093) | (7,252)
Acquired intangibles, net | $ 2,625 | $ 3,666

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