Leases - Summary of Additional Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease Cost
Operating lease cost	$ 688	$ 710	$ 2,106	$ 2,111
Short term lease cost	7	9	20	26
Total lease cost	$ 695	$ 719	2,126	2,137
Other information
Operating leases - operating cash flows			$ 1,970	$ 2,012
Weighted average lease term - operating leases, in years	10 years 6 months 18 days	10 years 10 months 6 days	10 years 6 months 18 days	10 years 10 months 6 days
Weighted average discount rate - operating leases (percent)	3.19%	3.30%	3.19%	3.30%