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Loans - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
loan_portfolio
loan
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
loan_portfolio
loan
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]          
Number of loan portfolios | loan_portfolio 4   4    
Allowance increase (decrease), net loan growth $ 335,000        
Allowance increase (decrease), change in macroeconomic conditions (82,000)        
Allowance increase (decrease), due to net charge-offs 681,000        
Provision 934,000 $ 354,000 $ 2,326,000 $ 2,856,000  
Credit for estimated credit losses on off-balance sheet credit exposures 234,000        
Off-balance sheet, credit loss, liability $ 1,200,000   $ 1,200,000    
Number of loans individually evaluated for impairment | loan 6   6    
Ending Loan Balance - Individually Evaluated $ 17,300,000 1,949,000 $ 17,300,000 1,949,000 $ 16,754,000
Number of loans with an allowance for credit loss on loans individually evaluated for impairment | loan 0   0    
Loans modified during period, amount     $ 0   0
Consumer          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Provision $ 296,000 301,000 2,354,000 1,640,000  
Ending Loan Balance - Individually Evaluated 0 0 0 0 0
Mortgage loans in process of foreclosure, amount 3,500,000   $ 3,500,000    
Consumer | Minimum | Automobile Loan          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Principal repayment terms, period (in years)     3 years    
Consumer | Minimum | Credit Card Receivable          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Principal repayment terms, period (in years)     1 year    
Consumer | Maximum | Automobile Loan          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Principal repayment terms, period (in years)     7 years    
Consumer | Maximum | Credit Card Receivable          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Principal repayment terms, period (in years)     5 years    
Residential          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Provision 837,000 306,000 $ 1,499,000 974,000  
Ending Loan Balance - Individually Evaluated $ 2,143,000 $ 1,949,000 $ 2,143,000 $ 1,949,000 $ 1,446,000
Residential | Real Estate Loan          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Appraised Value of Property, Percentage     80.00%    
Residential | Home Equity Loan          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Maximum loan to value ratio (in percent)     80.00%