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Long-Term Debt and Credit Arrangements (Interest payments and debt maturities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Debt Instrument [Line Items]      
Interest paid $ 6,303 $ 6,290 $ 5,373
Finance Lease, Interest Payment on Liability 1,378 791 $ 611
Maturities of Long-term Debt [Abstract]      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 6,684    
Long-term Debt, Maturities, Repayments of Principal in Year Two 64,508    
Long-term Debt, Maturities, Repayments of Principal in Year Three 1,896    
Long-term Debt, Maturities, Repayments of Principal in Year Four 951    
Long-term Debt, Maturities, Repayments of Principal in Year Five 704    
Long-term Debt, Maturities, Repayments of Principal after Year Five 14,179    
Long-term Debt 88,922    
Deferred financing costs, net (571) (486)  
Total long-term debt 88,351 $ 128,045  
Long-term Debt [Member]      
Maturities of Long-term Debt [Abstract]      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2,673    
Long-term Debt, Maturities, Repayments of Principal in Year Two 61,116    
Long-term Debt, Maturities, Repayments of Principal in Year Three 687    
Long-term Debt, Maturities, Repayments of Principal in Year Four 416    
Long-term Debt, Maturities, Repayments of Principal in Year Five 382    
Long-term Debt, Maturities, Repayments of Principal after Year Five 4,165    
Long-term Debt 69,439    
Deferred financing costs, net (571)    
Total long-term debt 68,868    
Finance Lease Obligations [Member]      
Maturities of Long-term Debt [Abstract]      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 4,011    
Long-term Debt, Maturities, Repayments of Principal in Year Two 3,392    
Long-term Debt, Maturities, Repayments of Principal in Year Three 1,209    
Long-term Debt, Maturities, Repayments of Principal in Year Four 535    
Long-term Debt, Maturities, Repayments of Principal in Year Five 322    
Long-term Debt, Maturities, Repayments of Principal after Year Five 10,014    
Long-term Debt 19,483    
Deferred financing costs, net 0    
Total long-term debt $ 19,483