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Segment Information (Schedule Of Long-Lived Assets By Geographic Region) (Details) - USD ($) $ in Thousands | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | ---
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | $ 184,565 | $ 158,780
Assets | 516,934 | 554,463
Greater China [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | 95,569 | 92,062
Assets | 254,997 | 301,498
Southeast Asia Pacific [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | 16,630 | 13,042
Assets | 49,786 | 45,495
North Asia [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | 10,466 | 3,311
Assets | 21,903 | 14,186
Asia Pacific [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | 122,665 | 108,415
Assets | 326,686 | 361,179
Americas And Europe [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | 61,900 | 50,365
Assets | $ 190,248 | $ 193,284

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