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Loans and Asset Quality Information - Schedule of Information of Loans Modified in Troubled Debt Restructuring (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract | Dec. 31, 2019 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 12 | 12 | 6
Pre- Modification Restructured Balances | $ 3,538 | $ 6,338 | $ 1,056
Post- Modification Restructured Balances | $ 3,535 | $ 6,341 | $ 1,060
Commercial, financial, and agricultural | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 2 | 2
Pre- Modification Restructured Balances | $ 0 | $ 143 | $ 395
Post- Modification Restructured Balances | $ 0 | $ 143 | $ 395
Commercial, financial, and agricultural | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 5 | 1 | 0
Pre- Modification Restructured Balances | $ 1,438 | $ 72 | $ 0
Post- Modification Restructured Balances | $ 1,435 | $ 72 | $ 0
Real estate, commercial | Real estate – construction, land development & other land loans | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 1 | 0
Pre- Modification Restructured Balances | $ 0 | $ 67 | $ 0
Post- Modification Restructured Balances | $ 0 | $ 67 | $ 0
Real estate, commercial | Real estate – construction, land development & other land loans | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 1 | 0 | 0
Pre- Modification Restructured Balances | $ 75 | $ 0 | $ 0
Post- Modification Restructured Balances | $ 75 | $ 0 | $ 0
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 0 | 1
Pre- Modification Restructured Balances | $ 0 | $ 0 | $ 274
Post- Modification Restructured Balances | $ 0 | $ 0 | $ 274
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 4 | 5 | 0
Pre- Modification Restructured Balances | $ 1,729 | $ 5,977 | $ 0
Post- Modification Restructured Balances | $ 1,729 | $ 5,977 | $ 0
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 1 | 2 | 3
Pre- Modification Restructured Balances | $ 33 | $ 75 | $ 387
Post- Modification Restructured Balances | $ 33 | $ 78 | $ 391
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 1 | 0 | 0
Pre- Modification Restructured Balances | $ 263 | $ 0 | $ 0
Post- Modification Restructured Balances | $ 263 | $ 0 | $ 0
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 0 | 0
Pre- Modification Restructured Balances | $ 0 | $ 0 | $ 0
Post- Modification Restructured Balances | $ 0 | $ 0 | $ 0
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 0 | 0
Pre- Modification Restructured Balances | $ 0 | $ 0 | $ 0
Post- Modification Restructured Balances | $ 0 | $ 0 | $ 0
Consumer loans | TDRs – Accruing |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 1 | 0
Pre- Modification Restructured Balances | $ 0 | $ 4 | $ 0
Post- Modification Restructured Balances | $ 0 | $ 4 | $ 0
Consumer loans | TDRs – Nonaccrual |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | contract | 0 | 0 | 0
Pre- Modification Restructured Balances | $ 0 | $ 0 | $ 0
Post- Modification Restructured Balances | $ 0 | $ 0 | $ 0

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