Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lessee, Lease, Description [Line Items]
Option to extend, term	10 years		10 years
Option to terminate, term			1 year
Weighted average remaining lease term	4 years		4 years
Weighted average discount rate	5.31%		5.31%
Rent expense under topic 842	$ 2.9		$ 9.9
Rent expense under topic 840		$ 3.7		$ 10.3
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term			1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term			8 years