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Allowance for Credit Losses - Loans - Loan modifications to borrowers experiencing financial difficulty (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]      
Unfunded loan $ 0   $ 0
Modified to borrowers which subsequently defaulted 0   0
Loans, net of unearned income 987,661,000   987,661,000
Maturity date extensions      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Amortized Cost Basis 428,000   428,000
Extended Maturity and Interest Rate Reduction      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Amortized Cost Basis $ 7,047,000   7,047,000
Other commercial and industrial      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Term extension date 1 year 5 months  
Loans, net of unearned income $ 150,842,000   150,842,000
Other commercial and industrial | Maturity date extensions      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Amortized Cost Basis $ 428,000   $ 428,000
Percentage of Total Class of Loans 0.28%   0.28%
Other commercial real estate (non-owner occupied)      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Term extension date 3 months   3 months
Deferred interest income, period 7 months   7 months
Deferred interest income $ 303,000   $ 303,000
Loans, net of unearned income 219,558,000   219,558,000
Other commercial real estate (non-owner occupied) | Commercial loans secured by Non-Owner Occupied real estate [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Loans, net of unearned income 7,000,000.0   7,000,000.0
Other commercial real estate (non-owner occupied) | Extended Maturity and Interest Rate Reduction      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Amortized Cost Basis $ 7,047,000   $ 7,047,000
Percentage of Total Class of Loans 3.21%   3.21%