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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, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | $ 42,439 | $ 55,523
Nonaccrual without allowance for loan loss | 4,488 | 9,245
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 1,956 | 5,458
Nonaccrual without allowance for loan loss | 1,233 | 5,207
Total Commercial [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 584 | 844
Residential Mortgages [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 22,744 | 25,439
Nonaccrual without allowance for loan loss | 1,287 | 1,997
Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 9,094 | 11,887
Nonaccrual without allowance for loan loss | 5 | 48
Total Commercial And Industrial [Member] | Total Commercial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 8,061 | 11,895
Nonaccrual without allowance for loan loss | 1,963 | 1,993
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 5,312 | 6,974
Nonaccrual without allowance for loan loss | 1,247 | 1,264
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonaccrual | 2,749 | 4,921
Nonaccrual without allowance for loan loss | $ 716 | $ 729

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