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Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | $ 7,730,984 |  | $ 7,476,221 |  |  |
Financing Receivable, Allowance for Credit Loss |  | (87,237) | $ (86,575) | (83,745) | $ (84,602) | $ (87,206) | $ (85,379)
Loans and Leases Receivable, Net Amount |  | 7,643,747 |  | 7,392,476 |  |  |
Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 252,120 |  | 209,226 |  |  |
Residential Real Estate Commercial [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 627,680 |  | 609,410 |  |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,319,170 |  | 1,239,861 |  |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 197,008 |  | 174,349 |  |  |
Residential Real Estate - Installment [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 6,152 |  | 5,904 |  |  |
Commercial Financial Agricultural less PPP and Overdrafts |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,299,399 |  | 1,292,025 |  |  |
PPP loans receivable [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,123 |  | 2,116 |  |  |
Bank Overdrafts |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,012 |  | 1,499 |  |  |
Commercial Real Estate [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance | [1] | 1,957,079 |  | 1,875,993 |  |  |
Financing Receivable, Allowance for Credit Loss |  | (18,856) | (16,855) | (16,374) | (18,618) | (19,141) | (17,829)
Consumer less GFSC and Check Loans |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,941,225 |  | 1,943,869 |  |  |
Check loans |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 1,948 |  | 2,067 |  |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |  |
Loan balance |  | 28,301 |  | 24,029 |  |  |
Financing Receivable, Allowance for Credit Loss |  | $ (165) | $ (161) | $ (117) | $ (108) | $ (112) | $ (161)
[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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