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Allowance for Loan Losses Activity in the allowance for loan losses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs $ 18,334 $ 10,863 $ 9,133  
Financing Receivable, Allowance for Credit Losses, Recovery 8,012 5,942 6,758  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 10,322 4,921 2,375  
Financing Receivable, Credit Loss, Expense (Reversal) 14,543 2,904 4,557  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 87,966 83,745 85,379 $ 83,197
Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     383  
Commercial Financial And Agricultural [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 5,443 1,226 2,056  
Financing Receivable, Allowance for Credit Losses, Recovery 438 292 826  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 5,005 934 1,230  
Financing Receivable, Credit Loss, Expense (Reversal) 2,192 (779) 4,192  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 12,683 15,496 16,987 14,025
Commercial Financial And Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     222  
Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 99 754 1,578  
Financing Receivable, Allowance for Credit Losses, Recovery 825 240 627  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (726) 514 951  
Financing Receivable, Credit Loss, Expense (Reversal) 2,471 (1,122) (6,686)  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 19,571 16,374 17,829 25,466
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     181  
Construction Real Estate [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 0 546 33  
Financing Receivable, Allowance for Credit Losses, Recovery 1,067 548 1,343  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (1,067) (2) (1,310)  
Financing Receivable, Credit Loss, Expense (Reversal) 831 (325) (1,518)  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 7,125 5,227 5,550 5,758
Construction Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     0  
Residential Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 31 44 81  
Financing Receivable, Allowance for Credit Losses, Recovery 366 482 164  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (335) (438) (83)  
Financing Receivable, Credit Loss, Expense (Reversal) 3,202 1,569 5,324  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 22,355 18,818 16,831 11,424
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     (20)  
Consumer Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 12,753 8,293 5,343  
Financing Receivable, Allowance for Credit Losses, Recovery 5,315 4,379 3,767  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 7,438 3,914 1,576  
Financing Receivable, Credit Loss, Expense (Reversal) 5,806 3,606 3,311  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 26,081 27,713 28,021 26,286
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     0  
Finance Leases Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Losses, Write-downs 8 0 42  
Financing Receivable, Allowance for Credit Losses, Recovery 1 1 31  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 7 (1) 11  
Financing Receivable, Credit Loss, Expense (Reversal) 41 (45) (66)  
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest $ 151 $ 117 161 $ 238
Finance Leases Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     $ 0