| Property, Plant, and Equipment Depreciation Expense (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | ||
|---|---|---|---|
| Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012 | |
| Property, Plant and Equipment [Abstract] | |||
| Depreciation | $ 7,717us-gaap_Depreciation | $ 6,511us-gaap_Depreciation | $ 6,514us-gaap_Depreciation | 
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
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