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Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | --- | ---
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | $ 86,379 | $ 78,178 |
Recorded investment | 85,851 | 77,491 | $ 50,907
Allowance for loan losses allocated | 5,531 | 5,230 |
Commercial Financial And Agricultural [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 29,542 |  | 14,844
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 17,334 | 21,194 |
Recorded investment | 17,137 | 21,010 |
Allowance for loan losses allocated | 0 | 0 |
Commercial Financial And Agricultural [Member] | Financing Receivable With A Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 12,586 | 12,289 |
Recorded investment | 12,405 | 12,078 |
Allowance for loan losses allocated | 5,365 | 5,104 |
Construction Real Estate Commercial [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 452 |  | 2,879
Construction Real Estate Commercial [Domain] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 452 | 453 |
Recorded investment | 452 | 453 |
Allowance for loan losses allocated | 0 | 0 |
Residential Real Estate Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 5,581 |  | 2,046
Residential Real Estate Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 5,545 | 1,921 |
Recorded investment | 5,478 | 1,854 |
Allowance for loan losses allocated | 0 | 0 |
Residential Real Estate Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 103 | 171 |
Recorded investment | 103 | 171 |
Allowance for loan losses allocated | 25 | 42 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 50,147 |  | $ 31,138
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 49,676 | 41,696 |
Recorded investment | 49,593 | 41,471 |
Allowance for loan losses allocated | 0 | 0 |
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 554 | 320 |
Recorded investment | 554 | 320 |
Allowance for loan losses allocated | 96 | 35 |
Finance Leases Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded investment | 129 |  |
Finance Leases Portfolio Segment [Member] | Financing Receivable With No Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Allowance for loan losses allocated | 0 | 0 |
Finance Leases Portfolio Segment [Member] | Financing Receivable With A Related Allowance Recorded [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid principal balance | 129 | 134 |
Recorded investment | 129 | 134 |
Allowance for loan losses allocated | $ 45 | $ 49 |

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