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Investment Securities - Narrative (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
securities
position
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
securities
Schedule of Available-for-sale Securities      
Individual securities at an unrealized loss position $ 0    
Debt securities available for sale, allowance for credit loss $ 0   $ 0
12 months or more, Number of securities | securities 48   27
Gross gains (losses) from sales of held to maturity $ 0 $ 0  
Debt securities held to maturity, allowance for credit loss $ 286,000   $ 286,000
Federal and state income tax rate 22.90%   22.30%
Purchase of FRB stock $ 7,900,000    
Equity investment, unrealized gain (loss) $ 7,000 $ 31,000  
Mortgage-backed securities, issued by US government sponsored agencies      
Schedule of Available-for-sale Securities      
Percentage of mortgage-backed securities in unrealized loss position for more than 12 months 99.00%    
Mortgage-backed securities, privately issued      
Schedule of Available-for-sale Securities      
Percentage of mortgage-backed securities in unrealized loss position for more than 12 months 1.00%    
12 months or more, Number of securities | position 3    
Fair value within book value 90.00%    
Bank-issued trust preferred securities      
Schedule of Available-for-sale Securities      
12 months or more, Number of securities | securities 1   1
Investment Securities      
Schedule of Available-for-sale Securities      
Interest receivable $ 7,000,000   $ 5,500,000