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Loans and Allowance for Credit Losses (Composition of Nonaccrual Loans and Without an Allowance for Loan Loss by Portfolio Class) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual $ 113,343 $ 106,870
Nonaccrual without allowance for loan loss 10,681 14,883
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 2,010 4,760
Nonaccrual without allowance for loan loss 1,326 5,114
Total Commercial [Member] | Construction and Land Development [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 1,028 3,173
Nonaccrual without allowance for loan loss 0 2,178
Residential Mortgages [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 51,262 46,986
Nonaccrual without allowance for loan loss 1,076 2,511
Consumer [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 11,732 10,703
Nonaccrual without allowance for loan loss 167 316
Total Commercial And Industrial [Member] | Total Commercial [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 47,311 41,248
Nonaccrual without allowance for loan loss 8,112 4,764
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 41,381 34,525
Nonaccrual without allowance for loan loss 5,302 3,294
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Nonaccrual 5,930 6,723
Nonaccrual without allowance for loan loss $ 2,810 $ 1,470