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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Jun. 28, 2014
Oct. 03, 2015
Sep. 27, 2014
Income Taxes          
Non-cash tax expense     $ 0.8    
Reconciliation of tax rates with federal statutory rate          
Effective tax rate (as a percent) 35.30% 42.80%   38.00% 44.10%