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Loans and Allowance - Summary of Troubled Debt Restructurings (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) loan | Dec. 31, 2018 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Pre-Modification Recorded Balance | $ 692 | $ 721
Post-Modification Recorded Balance | $ 690 | $ 719
Number of Loans | loan | 13 | 18
Commercial and farmland |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Pre-Modification Recorded Balance |  | $ 85
Post-Modification Recorded Balance |  | $ 85
Number of Loans | loan |  | 1
Residential |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Pre-Modification Recorded Balance | $ 636 | $ 490
Post-Modification Recorded Balance | $ 629 | $ 487
Number of Loans | loan | 11 | 11
Home equity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Pre-Modification Recorded Balance | $ 56 | $ 81
Post-Modification Recorded Balance | $ 61 | $ 81
Number of Loans | loan | 2 | 3
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Pre-Modification Recorded Balance |  | $ 65
Post-Modification Recorded Balance |  | $ 66
Number of Loans | loan |  | 3

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