Leases - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
ROU lease asset	$ 21.5
Operating lease liability	21.8
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
ROU lease asset	21.5	$ 23.2
Operating lease liability	$ 21.8	$ 23.2