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Employee Benefits (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Oct. 03, 2015
Sep. 27, 2014
Profit Sharing and 401 (k) Plan [Abstract]        
Employee compensation deferral (in hundredths)     50.00%  
Employer contributions $ 1.3 $ 0.9 $ 3.3 $ 2.7