Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.8.0.1
Basis of Presentation (Details)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 11, 2016
Sep. 30, 2017
USD ($)
Oct. 01, 2016
USD ($)
Sep. 30, 2017
USD ($)
Oct. 01, 2016
USD ($)
Business Acquisition          
Research and development, design and related engineering   $ 23.7 $ 21.6 $ 69.5 $ 66.2
Excess tax benefit       $ 0.3  
Convertible Class B Stock          
Business Acquisition          
Common stock conversion 0.15        
Date of payment of dividend to shareholders       Oct. 11, 2016