Leases Additional Details (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	2 years 8 months 12 days	2 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	4.30%	4.30%
Operating Lease, Cost	$ 2.2	$ 6.7
Operating Lease, Payments		$ 7.8
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	4 years	4 years