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Income Taxes (Income Before Income Tax Domestic And Foreign) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 28, 2018 | Dec. 29, 2017 | Dec. 30, 2016
Income Tax Disclosure [Line Items] |  |  |
Income (loss) from continuing operations before income taxes | $ 61,116 | $ 49,259 | $ 28,165
UNITED STATES [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Income (loss) from continuing operations before income taxes | (4,273) | 306 | (12,547)
International [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Income (loss) from continuing operations before income taxes | $ 65,389 | $ 48,953 | $ 40,712

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