Leases - Cost and Other information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lease, Cost [Abstract]
Operating Lease, Cost	$ 826	$ 1,489
Sublease Income	(95)	(188)
Lease, Cost	731	1,301
Operating Lease, Payments	$ 837	$ 1,493
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months	7 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	3.10%	3.10%
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 39	$ 39
reductions to right of use assets resulting from reduction in lease obligations	$ (717)	$ (1,295)