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Loans, Allowance for Credit Losses, and Asset Quality Information (Schedule of Nonaccrual Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | $ 13,825 |
Nonaccrual Loans with an Allowance | 19,168 |
Nonaccrual loans | 32,993 | $ 35,076
Commercial, financial, and agricultural |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 0 |
Nonaccrual Loans with an Allowance | 9,476 |
Nonaccrual loans | 9,476 | 9,681
Real estate, commercial | Real estate – construction, land development & other land loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 221 |
Nonaccrual Loans with an Allowance | 172 |
Nonaccrual loans | 393 | 643
Real estate, commercial | Real estate – mortgage – commercial and other |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 11,467 |
Nonaccrual Loans with an Allowance | 4,419 |
Nonaccrual loans | 15,886 | 17,191
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 1,759 |
Nonaccrual Loans with an Allowance | 4,006 |
Nonaccrual loans | 5,765 | 6,048
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 378 |
Nonaccrual Loans with an Allowance | 967 |
Nonaccrual loans | 1,345 | 1,333
Consumer loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Nonaccrual Loans with No Allowance | 0 |
Nonaccrual Loans with an Allowance | 128 |
Nonaccrual loans | $ 128 | $ 180

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