Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, initial lease term	15 years
Cumulative effect of new accounting principle in period of adoption	$ 2,843
Sublease income	200
Lessee, operating lease, liability, payments, net of sublease income, due	$ 6,100
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	16 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Cumulative effect of new accounting principle in period of adoption		$ 2,800