Summary of Significant Accounting Policies (Details) ft² in Thousands |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Sep. 28, 2017
ft²
state
segment
facility
|
Dec. 29, 2016
ft²
state
segment
facility
|
Dec. 31, 2015 |
Dec. 25, 2014 |
|
| Number of reportable segments | segment | 1 | 1 | ||
| Number of states with facilities | state | 20 | 17 | ||
| Number of distribution centers | 4 | |||
| Fiscal year period | 364 days | 371 days | 364 days | |
| Warehouse Format Store [Member] | ||||
| Number of stores | 80 | 69 | ||
| Area of facility | ft² | 73 | 72 | ||
| Small Format Store [Member] | ||||
| Number of stores | 1 | 1 | ||
| X | ||||||||||
- Definition The length of the fiscal year, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition The number of distribution centers owned or operated by the entity. No definition available.
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| X | ||||||||||
- Definition Area of a real estate property. No definition available.
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| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available.
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| X | ||||||||||
- Definition The number of states the entity operates in as of the balance sheet date. No definition available.
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| X | ||||||||||
- Definition Represents the number of stores. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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