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Intangible Assets Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life     10 years  
Amortization of Intangible Assets $ 1.4 $ 1.0 $ 2.5 $ 2.1