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Leases - (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) lease	Mar. 31, 2020 USD ($)	Dec. 31, 2020
Net gain on sale or disposition of assets	$ 621,000	$ 0
Short-term lease expense	35,000	34,000
Variable lease payments	300,000	300,000
Operating lease cost	$ 2,104,000	1,885,000
Weighted-average remaining lease term-operating leases (Year)	7 years 10 months 24 days		8 years 3 months 18 days
Weighted average discount rate-operating leases	3.20%		3.20%
Minimum [Member]
Term of contract	2 months
Maximum [Member]
Term of contract	15 years
Branches And Office Space [Member]
Number of leases | lease	28
Vehicles [Member]
Number of leases | lease	10
Equipment [Member]
Number of leases | lease	1
Professional Services [Member]
Short-term lease expense	$ 35,000	$ 35,000

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