Leases - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) branch property	Mar. 31, 2020 USD ($)
Leases [Abstract]
Number of operating leases | property	15
Number of relocated branches | branch	2
Operating lease expense | $	$ 329	$ 325
Weighted average remaining lease term on operating leases	26 years 4 months 24 days	27 years 1 month 6 days
Weighted average discount rate for operating leases	3.80%	3.80%