Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating lease cost:
Amortization of right-of-use assets	$ 1.4	$ 1.4	$ 4.2	$ 4.2
Interest on lease liabilities	0.3	0.3	0.8	1.0
Total operating lease cost	$ 1.7	$ 1.7	$ 5.0	$ 5.2