Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Lease remaining term of contract	11 years
Lessee, Lease, Description [Line Items]
Lease right-of-use assets	$ 16.2
Operating lease liability	$ 17.0
Maximum
Lessee, Lease, Description [Line Items]
Lease extension term	5 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Lease right-of-use assets		$ 17.0
Operating lease liability		$ 17.0