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Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Farmland |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | $ 591 | $ 659
Farmland | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Farmland | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Farmland | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 591 | 659
Owner-occupied, nonfarm nonresidential properties |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 224 | 329
Owner-occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Owner-occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Owner-occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 224 | 329
Commercial and Industrial |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 1,547 | 3,680
Commercial and Industrial | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Commercial and Industrial | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Commercial and Industrial | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 1,547 | 3,680
Other construction loans and all land development and other land loans |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 225 | 1,790
Other construction loans and all land development and other land loans | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Other construction loans and all land development and other land loans | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Other construction loans and all land development and other land loans | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 225 | 1,790
Multifamily (5 or more) residential properties |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 646 |
Multifamily (5 or more) residential properties | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 |
Multifamily (5 or more) residential properties | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 |
Multifamily (5 or more) residential properties | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 646 |
Non-owner occupied, nonfarm nonresidential properties |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 2,971 | 9,622
Non-owner occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Non-owner occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 | 0
Non-owner occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 2,971 | 9,622
Obligations (other than securities and leases) of states and political subdivisions |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 269 |
Obligations (other than securities and leases) of states and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 |
Obligations (other than securities and leases) of states and political subdivisions | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | 0 |
Obligations (other than securities and leases) of states and political subdivisions | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions | $ 269 |
Residential Mortgages secured by first liens |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions |  | 659
Residential Mortgages secured by first liens | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions |  | 0
Residential Mortgages secured by first liens | Significant Other Observable Inputs (Level 2) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions |  | 0
Residential Mortgages secured by first liens | Significant Unobservable Inputs (Level 3) |  |
Impaired Loans [Abstract] |  |
Obligations (other than securities and leases) of states and political subdivisions |  | $ 659

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