Leases - Lease Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Leases [Abstract]
Lease liabilities	$ 5,771	$ 5,771
Right-of-use assets	$ 5,758	$ 5,758
Weighted average remaining lease term	8 years 6 months	8 years 6 months
Weighted average discount rate	3.20%	3.20%
Operating lease cost	$ 283	$ 494
Short-term lease cost	1	2
Total lease cost	284	496
Cash paid for amounts included in the measurement of lease liabilities	$ 274	$ 483