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Derivative and Hedging Activities (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
derivative
Jun. 28, 2016
USD ($)
derivative
Jun. 30, 2015
USD ($)
derivative
Dec. 29, 2015
USD ($)
Jan. 07, 2009
USD ($)
Interest rate cash flow hedges          
Gain recognized in AOCI, net of tax (effective portion) $ 215,000 $ 27,000 $ 416,000    
Loss reclassified from AOCI to income (effective portion) $ 367,000 $ 45,000 $ 736,000    
Number of interest rate swaps with activity during the period which have expired | derivative 1 1 1    
Number of interest rate swaps with activity during the period | derivative 2   2    
Interest Rate Swap | Other accrued liabilities          
Interest Rate Swaps          
Derivative liability       $ 45,000  
Interest rate swap, entered January 7, 2009          
Interest Rate Swaps          
Notional amount of interest rate swap         $ 25,000,000
Notional amount of hedge obligation         $ 25,000,000
Fixed interest rate of derivative (as a percent)         2.34%