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Operations and Summary of Significant Accounting Policies (Details 2)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 27, 2014
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Dec. 28, 2013
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Dec. 29, 2012
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| Principles of Consolidation | |||
| Length of fiscal year | 364 days | 364 days | 364 days |
| Minimum | |||
| Principles of Consolidation | |||
| Number of years after which fiscal year end dates will result in an additional week | 5 years | ||
| Maximum | |||
| Principles of Consolidation | |||
| Number of years after which fiscal year end dates will result in an additional week | 6 years | ||