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Goodwill and Intangibles - Schedule of Future Amortization Expense (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]        
2018 remaining $ 5.2      
2018 6.6      
2019 6.2      
2020 5.7      
2021 5.3      
Thereafter 18.3      
Finite-Lived Intangible Assets, Net $ 47.3 $ 49.1 $ 9.1 $ 9.7