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Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | $ 7,525,005 | $ 7,476,221 |  |
Financing Receivable, Allowance for Credit Loss |  | (85,084) | (83,745) | $ (85,946) | $ (85,379)
Loans and Leases Receivable, Net Amount |  | 7,439,921 | 7,392,476 |  |
Construction Real Estate Commercial [Domain] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 238,721 | 209,226 |  |
Residential Real Estate Commercial [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 617,002 | 609,410 |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,251,340 | 1,239,861 |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 177,017 | 174,349 |  |
Residential Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 6,005 | 5,904 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,276,470 | 1,295,640 |  |
Financing Receivable, Allowance for Credit Loss |  | (14,971) | (15,496) | (16,572) | (16,987)
PPP loans receivable [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,800 | 2,116 |  |
Bank Overdrafts |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,635 | 1,499 |  |
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance | [1] | 1,900,968 | 1,875,993 |  |
Financing Receivable, Allowance for Credit Loss |  | (17,181) | (16,374) | (17,946) | (17,829)
Check loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,900 | 2,067 |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 28,597 | 24,029 |  |
Financing Receivable, Allowance for Credit Loss |  | (163) | (117) | $ (124) | $ (161)
Consumer less GFSC and Check Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | 1,923,867 | 1,943,869 |  |
Commercial Financial Agricultural less PPP and Overdrafts |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Loan balance |  | $ 1,273,035 | $ 1,292,025 |  |
[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.

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