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Segment Information (Schedule Of Net Revenue By Geographic Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 355,483 | $ 338,458 | $ 1,009,863 | $ 960,369
United States [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 235,584 | 217,631 | 663,096 | 610,505
Americas Excluding United States [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 8,804 | 7,604 | 19,870 | 19,488
EMEA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 62,161 | 60,034 | 175,810 | 176,192
APAC [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 48,934 | $ 53,189 | $ 151,087 | $ 154,184

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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