Leases - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease not yet commenced, undiscounted amount	$ 54.0
Finance lease, not yet commenced, undiscounted amount	$ 1.2
Minimum
Lessee, Lease, Description [Line Items]
Lease, remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease, remaining lease term	30 years