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Long-Term Debt and Credit Arrangements (Notes Payable - Buildings) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 26, 2015
Jan. 07, 2017
Jan. 23, 2015
Dec. 27, 2014
Nov. 07, 2014
Debt Instrument [Line Items]          
Notes payable - buildings $ 14,063     $ 8,295  
Building - Adairsville [Member]          
Debt Instrument [Line Items]          
Notes payable - buildings         $ 8,330
Debt Instrument, Interest Rate, Stated Percentage         2.00%
Debt Instrument, Periodic Payment, Principal 35        
Final Payment on Debt Instument         $ 4,165
Fixed Interest Rate         4.50%
Building - Saraland [Member]          
Debt Instrument [Line Items]          
Notes payable - buildings     $ 6,290    
Debt Instrument, Interest Rate, Stated Percentage     2.00%    
Debt Instrument, Periodic Payment, Principal $ 26        
Final Payment on Debt Instument     $ 3,145    
Fixed Interest Rate   4.30%