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Commitments and Contingencies (Details) - USD ($) $ in Thousands | Jul. 01, 2017 | Dec. 31, 2016 | Jun. 25, 2016
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Commitments and Contingencies Disclosure [Abstract] |  |  |
Purchase Obligation, Due Second Year | $ 0 |  |
Letters of Credit Outstanding, Amount | $ 44,300 | $ 44,300 | $ 50,500

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant