Goodwill and Intangible Assets (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 3.3	$ 2.6
Annual Future Amortization Expense
Anticipated future amortization expense for 2017	11.3
Anticipated future amortization expense for 2018	15.1
Anticipated future amortization expense for 2019	14.9
Anticipated future amortization expense for 2020	11.7
Anticipated future amortization expense for 2021	$ 10.9