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Allowance for Credit Losses - Loans - Loan modifications to borrowers experiencing financial difficulty (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
Jun. 30, 2025
USD ($)
loan
Jun. 30, 2024
USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]          
Number of loans modified | loan       0  
Unfunded loan commitments $ 0 $ 0   $ 0 $ 0
Modified to borrowers which subsequently defaulted 0     0  
Extended Maturity          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Amortized Cost Basis 192     192  
Extended Maturity and Interest Rate Reduction          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Amortized Cost Basis   171     171
Commercial Portfolio Segment | Commercial and industrial | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Amortized Cost Basis   $ 171     $ 171
Percentage of Total Class of Loans         0.11%
Term extension date   90 days 90 days    
Residential mortgages | Extended Maturity          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Amortized Cost Basis $ 192     $ 192  
Percentage of Total Class of Loans       0.11%  
Term extension date       19 years