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Acquisition - Additional Information (Details) $ / shares in Units, $ in Millions	Jan. 10, 2020 USD ($) branch Loan $ / shares shares
Affinity Bank | Cobb County, Georgia
Business Acquisition [Line Items]
Number of branch office | branch	1
Affinity Bank | Fulton County, Georgia
Business Acquisition [Line Items]
Number of loan production office | Loan	1
ABB Financial Group, Inc.
Business Acquisition [Line Items]
Date of merger	Jan. 10, 2020
Common stock holder right to receive cash per share | $ / shares	$ 7.50
Cash paid	$ 40.3
Stock issued | shares	0
Payments for vested restricted stock, net	$ 2.7

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