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Allowance for Loan Credit Losses - Allowance for loan losses activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) $ 20,208 $ 20,032
Charge-offs   (1)
Recoveries   2
Provision for (recovery of) credit losses   175
Ending Balance (prior to adoption)   20,208
Beginning Balance 20,208  
Recoveries 2  
Provision for (recovery of) credit losses (2,832)  
Ending balance 19,543 20,208
Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance 2,165  
Ending balance   2,165
Real Estate Loans | Commercial Real Estate    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 13,205 13,091
Charge-offs   (1)
Provision for (recovery of) credit losses   115
Ending Balance (prior to adoption)   13,205
Beginning Balance 13,205  
Provision for (recovery of) credit losses 2,285  
Ending balance 12,841 13,205
Real Estate Loans | Commercial Real Estate | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (2,649)  
Ending balance   (2,649)
Real Estate Loans | Construction and land development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 2,860 2,824
Provision for (recovery of) credit losses   36
Ending Balance (prior to adoption)   2,860
Beginning Balance 2,860  
Provision for (recovery of) credit losses (1,549)  
Ending balance 1,787 2,860
Real Estate Loans | Construction and land development | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance 476  
Ending balance   476
Real Estate Loans | Residential Real Estate    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 3,044 2,769
Provision for (recovery of) credit losses   275
Ending Balance (prior to adoption)   3,044
Beginning Balance 3,044  
Provision for (recovery of) credit losses (3,273)  
Ending balance 4,323 3,044
Real Estate Loans | Residential Real Estate | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance 4,552  
Ending balance   4,552
Commercial - Non-Real Estate | Commercial    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 456 711
Recoveries   2
Provision for (recovery of) credit losses   (257)
Ending Balance (prior to adoption)   456
Beginning Balance 456  
Recoveries 2  
Provision for (recovery of) credit losses (330)  
Ending balance 495 456
Commercial - Non-Real Estate | Commercial | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance 367  
Ending balance   367
Consumer - Non-Real Estate | Consumer    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 5 5
Ending Balance (prior to adoption)   5
Beginning Balance 5  
Provision for (recovery of) credit losses 35  
Ending balance 97 5
Consumer - Non-Real Estate | Consumer | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance 57  
Ending balance   57
Unallocated    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance (prior to adoption) 638 632
Provision for (recovery of) credit losses   6
Ending Balance (prior to adoption)   638
Beginning Balance 638  
Ending balance   638
Unallocated | Cumulative Effect, Period of Adoption, Adjustment    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Beginning Balance $ (638)  
Ending balance   $ (638)