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Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
borrower
loan
Sep. 30, 2021
loan
Dec. 31, 2021
USD ($)
Details related to loans identified as Troubled Debt Restructurings (TDRs):      
Specific reserve allocations for TDR's $ 0.4   $ 0.5
Troubled debt restructuring loans $ 12.2   12.6
Number of loans to defaulted borrowers | loan 1,000,000 1,000,000  
Acquisition, development and construction      
Details related to loans identified as Troubled Debt Restructurings (TDRs):      
Loans defaulted under the restructured terms $ 0.1    
Number of loans to defaulted borrowers | loan 1    
Number of borrower defaulted | borrower 1    
Accruing      
Details related to loans identified as Troubled Debt Restructurings (TDRs):      
Troubled debt restructuring loans $ 4.2   $ 4.5
Accruing | Portfolio Risk | Troubled Debt Restructured Loans      
Details related to loans identified as Troubled Debt Restructurings (TDRs):      
Percentage of total impaired loans 16.00%   21.00%