Leases - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 14,307
Operating lease liability	14,224
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	14,300	$ 15,900
Operating lease liability	$ 14,200	$ 15,900