v3.26.1
Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance $ 9,667,260 $ 8,051,242    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 9,667,260 8,051,242    
Financing Receivable, Allowance for Credit Loss (108,590) (92,973) $ (88,130) $ (87,966)
Loans and Leases Receivable, Net Amount 9,558,670 7,958,269    
Construction Real Estate Commercial [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 479,304 298,491    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 479,304 298,491    
Residential Real Estate Commercial [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 960,920 752,695    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 960,920 752,695    
Residential Real Estate - Mortgage [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 1,501,261 1,375,641    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,501,261 1,375,641    
Residential Real Estate - HELOC [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 314,202 241,058    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 314,202 241,058    
Residential Real Estate - Installment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 5,793 5,988    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 5,793 5,988    
Construction Real Estate Retail        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 127,708 100,934    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 127,708 100,934    
Commercial Financial Agricultural less PPP and Overdrafts        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 1,384,265 1,210,047    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,384,265      
Bank Overdrafts        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 1,493 2,103    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,493 2,103    
Commercial Real Estate [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance [1] 3,003,932 2,208,660    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 3,003,932 2,208,660    
Financing Receivable, Allowance for Credit Loss (25,872) (18,177) (19,838) (19,571)
Consumer less GFSC and Check Loans        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 1,857,503 1,821,471    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,857,503 1,821,471    
Check loans        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 1,650 1,776    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,650 1,776    
Finance Leases Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loan balance 29,229 32,378    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 29,229 32,378    
Financing Receivable, Allowance for Credit Loss $ (266) $ (208) $ (181) $ (151)
[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.