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Balance Sheet Components (Schedule Of Intangibles, Net) (Details) - USD ($) $ in Thousands | Oct. 01, 2017 | Dec. 31, 2016
--- | --- | ---
Intangible Assets [Line Items] |  |
Gross | $ 134,144 | $ 134,144
Accumulated Amortization | (106,617) | (96,245)
Finite-Lived Intangible Assets, Net | 27,527 | 37,899
Technology [Member] |  |
Intangible Assets [Line Items] |  |
Gross | 66,599 | 66,599
Accumulated Amortization | (61,620) | (57,381)
Finite-Lived Intangible Assets, Net | 4,979 | 9,218
Customer Contracts And Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross | 56,500 | 56,500
Accumulated Amortization | (35,674) | (30,375)
Finite-Lived Intangible Assets, Net | 20,826 | 26,125
Other [Member] |  |
Intangible Assets [Line Items] |  |
Gross | 11,045 | 11,045
Accumulated Amortization | (9,323) | (8,489)
Finite-Lived Intangible Assets, Net | $ 1,722 | $ 2,556

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