Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease, weighted average remaining lease term	22 years
Operating lease, weighted average discount rate, percent	4.50%
Finance lease, weighted average remaining lease term	14 years
Finance lease, weighted average discount rate, percent	5.20%
Operating lease, cost	$ 1.4	$ 1.4
Finance lease, cost	0.2	0.1
Operating lease, payments	1.5	1.0
Right-of-use asset obtained in exchange for operating lease liability	2.7	0.3
Sublease income	$ 2.4	$ 2.1