Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Lessor, operating lease, term of contract	15 years 3 months
Weighted average remaining lease term in years, including the lease for which the right to use has not commenced	12 years 1 month 6 days
Operating lease cost	$ 15.3	$ 15.0	$ 15.0
Minimum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term in years, including the lease for which the right to use has not commenced	1 year
Maximum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term in years, including the lease for which the right to use has not commenced	15 years 3 months 18 days