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Summary of Significant Accounting Policies (Changes in Future Closed Store Lease Obligations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Restructuring Cost and Reserve [Line Items]    
Closed store lease liabilities, Beginning Balance $ 955  
Closed store lease liabilities, Ending Balance $ 212 $ 955
Maximum [Member]    
Restructuring Cost and Reserve [Line Items]    
Remaining lease term of closed stores 3 years  
Minimum [Member]    
Restructuring Cost and Reserve [Line Items]    
Remaining lease term of closed stores 1 year  
Facility Closing [Member]    
Restructuring Cost and Reserve [Line Items]    
Closed store lease liabilities, Beginning Balance $ 955 1,193
Additions 0 119
Payments (578) (375)
Adjustments (165) 18
Closed store lease liabilities, Ending Balance $ 212 $ 955