Goodwill and Intangible Assets, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill recognized through acquisitions	$ 64.7
Amortization expense	8.2	$ 7.2
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	25.0
2017	32.2
2018	30.7
2019	28.8
2020	27.7
2021	$ 19.9