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Allowance For Credit Losses (Composition Of The Allowance For Loan Losses) (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 1,044,000 $ 1,299,000    
Allowance for loan losses collectively evaluated for impairment 87,086,000 86,667,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 88,130,000 87,966,000 $ 85,084,000 $ 83,745,000
Loans collectively evaluated for impairment 7,819,943,000 7,746,515,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 2,139,000 $ 2,174,000    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 1.11% 1.12%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 1.12% 1.13%    
Loan balance $ 7,883,735,000 $ 7,817,128,000    
Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 1,044,000 1,299,000    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 2,156,000 2,370,000    
Loans individually evaluated for impairment $ 47,718,000 $ 53,149,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 2.19% 2.44%    
Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 13,935,000 $ 15,290,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Commercial Financial And Agricultural [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 10,432,000 $ 11,424,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 11,408,000 12,683,000 14,971,000 15,496,000
Loans collectively evaluated for impairment 1,210,378,000 1,230,101,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 0.86% 0.93%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 0.91% 1.00%    
Loan balance $ 1,247,228,000 $ 1,269,585,000    
Commercial Financial And Agricultural [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 976,000 1,259,000    
Loans individually evaluated for impairment $ 22,915,000 $ 24,194,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 4.26% 5.20%    
Commercial Financial And Agricultural [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 13,935,000 $ 15,290,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Commercial Real Estate [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 19,770,000 $ 19,571,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 19,838,000 19,571,000 17,181,000 16,374,000
Loans collectively evaluated for impairment 2,005,101,000 1,969,785,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 1,318,000 $ 1,317,000    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 0.99% 0.99%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 0.98% 0.98%    
Loan balance [1] $ 2,029,349,000 $ 1,994,332,000    
Commercial Real Estate [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 68,000 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 68,000 0    
Loans individually evaluated for impairment $ 22,930,000 $ 23,230,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.30% 0.00%    
Commercial Real Estate [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Construction Real Estate [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 8,139,000 $ 7,125,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 8,139,000 7,125,000 5,742,000 5,227,000
Loans collectively evaluated for impairment 461,692,000 411,988,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 569,000 $ 581,000    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 1.76% 1.73%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 1.76% 1.73%    
Loan balance $ 462,361,000 $ 412,577,000    
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 0 0    
Loans individually evaluated for impairment $ 100,000 $ 8,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Construction Real Estate [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Residential Real Estate [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 22,749,000 $ 22,315,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 22,749,000 22,355,000 19,633,000 18,818,000
Loans collectively evaluated for impairment 2,237,255,000 2,194,457,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 252,000 $ 276,000    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 1.02% 1.02%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 1.02% 1.02%    
Loan balance $ 2,239,270,000 $ 2,200,433,000    
Residential Real Estate [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 0 40,000    
Loans individually evaluated for impairment $ 1,763,000 $ 5,700,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.70%    
Residential Real Estate [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Consumer [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 25,815,000 $ 26,081,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 25,815,000 26,081,000 27,394,000 27,713,000
Loans collectively evaluated for impairment 1,876,690,000 1,910,372,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 1.38% 1.37%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 1.38% 1.37%    
Loan balance $ 1,876,690,000 $ 1,910,372,000    
Consumer [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 868,000 786,000    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Consumer [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0 $ 0    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Finance Leases Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses collectively evaluated for impairment $ 181,000 $ 151,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 181,000 151,000 $ 163,000 $ 117,000
Loans collectively evaluated for impairment 28,827,000 29,812,000    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment 0.63% 0.51%    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance 0.00% 0.00%    
Total ending allowance for loan losses balance as a percentage of loan balance 0.63% 0.51%    
Loan balance $ 28,837,000 $ 29,829,000    
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment 0 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 0 0    
Loans individually evaluated for impairment $ 10,000 $ 17,000    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
Finance Leases Portfolio Segment [Member] | Performing Financial Instruments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for loan losses individually evaluated for impairment $ 0    
Loans individually evaluated for impairment $ 0 $ 0    
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment 0.00% 0.00%    
[1] Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class.