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Loans and Allowance for Loan Losses - Impairment Methodology (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
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Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 317 | $ 3,044 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 13,962 | 13,859 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 14,279 | 16,903 | $ 18,361 | $ 18,113
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 18,787 | 27,254 |  |
Financing Receivable, Collectively Evaluated for Impairment | 1,315,136 | 1,274,879 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 1,333,923 | 1,302,133 |  |
Commercial, Financial, & Agricultural |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 39 | 42 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,791 | 2,675 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 2,830 | 2,717 | 4,676 | 5,121
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 319 | 341 |  |
Financing Receivable, Collectively Evaluated for Impairment | 220,696 | 216,873 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 221,015 | 217,214 |  |
Residential real estate | Construction |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 60 | 137 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 60 | 137 | 309 | 213
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 0 | 0 |  |
Financing Receivable, Collectively Evaluated for Impairment | 21,515 | 27,920 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 21,515 | 27,920 |  |
Residential real estate | Mortgages |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 206 | 166 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,372 | 2,316 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 2,578 | 2,482 | 2,594 | 2,679
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 2,428 | 2,391 |  |
Financing Receivable, Collectively Evaluated for Impairment | 285,451 | 276,955 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 287,879 | 279,346 |  |
Commercial real estate | Construction |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 13 | 13 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 651 | 575 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 664 | 588 | 532 | 475
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 100 | 105 |  |
Financing Receivable, Collectively Evaluated for Impairment | 103,378 | 91,264 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 103,478 | 91,369 |  |
Commercial real estate | Mortgages |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 41 | 2,815 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 7,651 | 7,847 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 7,692 | 10,662 | 9,904 | 9,354
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 15,800 | 24,357 |  |
Financing Receivable, Collectively Evaluated for Impairment | 661,739 | 638,899 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 677,539 | 663,256 |  |
Installment and Other Consumer |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 18 | 8 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 255 | 248 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 273 | 256 | 245 | 264
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 140 | 60 |  |
Financing Receivable, Collectively Evaluated for Impairment | 22,357 | 22,968 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 22,497 | 23,028 |  |
Un- allocated |  |  |  |
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0 |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 182 | 61 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total | 182 | 61 | $ 101 | $ 7
Loans and Leases Receivable, Gross, Carrying Amount [Abstract] |  |  |  |
Financing receivable, individually evaluated for impairment | 0 | 0 |  |
Financing Receivable, Collectively Evaluated for Impairment | 0 | 0 |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | $ 0 | $ 0 |  |

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