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Derivative Financial Instruments (Details 2) - USD ($)
$ in Thousands
6 Months Ended
Jul. 04, 2015
Jan. 03, 2015
Derivative financial instrument    
Gains or losses from the hedging instrument which was excluded from the assessment of effectiveness $ 0  
Other assets, net    
Derivative financial instrument    
Fair value of interest rate swap   $ 331
Other non-current liabilities:    
Derivative financial instrument    
Fair value of interest rate swap $ 35