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Intangible Assets Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life     10 years  
Amortization of Intangible Assets $ 1.1 $ 1.1 $ 3.5 $ 3.2