Leases - Summary of Additional Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease Cost
Operating lease cost	$ 706	$ 677	$ 1,401	$ 1,355
Short term lease cost	8	8	17	17
Total lease cost	$ 714	$ 685	1,418	1,372
Other information
Operating leases - operating cash flows			$ 1,341	$ 1,348
Weighted average lease term - operating leases, in years	10 years 9 months 18 days	11 years 3 months 3 days	10 years 9 months 18 days	11 years 3 months 3 days
Weighted average discount rate - operating leases (percent)	3.34%	3.32%	3.34%	3.32%