Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Lease, cost	$ 6.6	$ 12.7
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, option to terminate or extend	1 year