Leases - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Lease cost	$ 6.1	$ 5.0	$ 12.2	$ 9.7
Number of leased properties | property			3
Lease income	$ 0.7	$ 0.7	$ 1.5	$ 1.5
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease term	1 year		1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease term	14 years		14 years