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Loans - Amortized cost basis of loans (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Financing Receivable, Modifications [Line Items]    
Amortized Cost $ 360 $ 47
% of Total Class of Financing Receivable 0.10%  
Term Extension    
Financing Receivable, Modifications [Line Items]    
Amortized Cost $ 341  
Interest Rate Reduction    
Financing Receivable, Modifications [Line Items]    
Amortized Cost 19 47
Commercial real estate | Interest Rate Reduction    
Financing Receivable, Modifications [Line Items]    
Amortized Cost   $ 47
Residential mortgage | Term Extension    
Financing Receivable, Modifications [Line Items]    
Amortized Cost $ 341  
% of Total Class of Financing Receivable 0.10%  
Residential mortgage | Interest Rate Reduction    
Financing Receivable, Modifications [Line Items]    
Amortized Cost $ 19