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Premises and Equipment - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Property Plant And Equipment [Line Items]        
Depreciation and amortization expense, excluding ROU assets portion $ 0.4 $ 0.4 $ 1.4 $ 1.4