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Nature of Business and Basis of Presentation - Textual (Details) | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 24, 2016
Accounting Policies [Line Items] |  |
Fiscal year/fiscal quarter duration | 91 days | 91 days
Maximum period of delivery to customers | 6 months |
Maximum period services are provided over the fixed arrangement term | 12 months |
Minimum [Member] |  |
Accounting Policies [Line Items] |  |
Fiscal year/fiscal quarter duration | 364 days |
Maximum [Member] |  |
Accounting Policies [Line Items] |  |
Fiscal year/fiscal quarter duration | 371 days |

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- Definition [Line Items] for Accounting Policies [Table] + References No definition available. + Details
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- Definition Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Details
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