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Loans and Allowance - Summary of Troubled Debt Restructurings by Modification Type (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | $ 2,641 | $ 184 | $ 3,663 | $ 433
Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 2,495 |  | 3,186 | 0
Rate Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 146 |  | 256 | 88
Combination |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 0 | 184 | 221 | 345
Commercial and industrial loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 585 |
Commercial and industrial loans | Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 585 |
Commercial and industrial loans | Combination |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 0 |
Commercial and farmland |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 106 |
Commercial and farmland | Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 106 |
Commercial and farmland | Combination |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  |  | 0 |
Residential |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 2,317 | 184 | 2,648 | 433
Residential | Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 2,266 |  | 2,266 |
Residential | Rate Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 51 |  | 161 | 88
Residential | Combination |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification |  | $ 184 | 221 | $ 345
Home equity |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 307 |  | 307 |
Home equity | Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 212 |  | 212 |
Home equity | Rate Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 95 |  | 95 |
Individuals' loans for household and other personal expenditures |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 17 |  | 17 |
Individuals' loans for household and other personal expenditures | Term Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | 17 |  | 17 |
Individuals' loans for household and other personal expenditures | Rate Modification |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Modification | $ 0 |  | $ 0 |

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