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Intangible Assets Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 10 years  
Amortization of Intangible Assets $ 3.7 $ 2.8