Leases - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 3,048
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	5 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Lease right-of-use assets		$ 4,000
Operating lease liabilities		$ 4,000