Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Leases
Operating Lease, Right-of-Use Asset	$ 5,900	$ 5,900	$ 6,700
Operating Lease, Liability	6,133	6,133	$ 6,700
Operating Lease, Payments	405	816
Lease, Cost	$ 423	$ 852
Operating Lease, Weighted Average Remaining Lease Term	6 years 10 months 24 days	6 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	4.80%	4.80%