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Commitments and Contingencies (Details) - USD ($) $ in Thousands | Sep. 29, 2018 | Dec. 30, 2017 | Sep. 30, 2017
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Commitments and Contingencies Disclosure [Abstract] |  |  |
Purchase Obligation, Due in Next Twelve Months | $ 20,000 |  |
Purchase Obligation, Due Second Year | 0 |  |
Letters of Credit Outstanding, Amount | $ 36,700 | $ 39,600 | $ 41,600

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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