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Goodwill and Intangible Assets - Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]        
Intangible assets amortization expense $ 9.7 $ 10.2 $ 28.9 $ 30.7