Debt - Schedule of Future Maturities of Debt (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Long Term Debt By Maturity [Abstract]  
2019 $ 6.9
2020 17.5
2021 17.5
2022 and thereafter 558.1
Total $ 600.0 [1]
[1] Excludes unamortized debt issuance costs of $11.3 million and a discount of $1.7 million which do not represent contractual commitments with a fixed amount or maturity date.