Leases - Narratives (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) facility	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Leases [Abstract]
Right of use assets	$ 28.0	$ 29.0
Operating lease liability	27.7	28.7
Operating lease liabilities, current	$ 5.1	5.1	$ 5.1
Weighted average lease term	5 years 7 months 6 days
Operating lease weighted average discount rate (percent)	2.30%
Operating lease rent expense	$ 3.0	$ 2.9
Number of operating contracts | facility	7