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Loans and Allowance - Summary of Troubled Debt Restructurings by Modification Type (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan | Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance | $ 12,938 | $ 2,640 | $ 13,998 | $ 4,159
Post - Modification Recorded Balance | $ 12,992 | $ 2,652 | $ 14,054 | $ 4,208
Number of Loans | loan | 2 | 34 | 14,000 | 45,000
Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | $ 12,976 | $ 2,506 | $ 13,773 | $ 3,725
Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | 16 | 146 | 142 | 259
Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 139 | 224
Commercial and industrial loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  |  | 348 | 654
Post - Modification Recorded Balance |  |  | $ 348 | $ 654
Number of Loans | loan |  |  | 2,000 | 3,000
Commercial and industrial loans | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | $ 348 | $ 654
Commercial and industrial loans | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 0 | 0
Commercial and industrial loans | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 0 | 0
Agricultural land, production and other loans to farmers |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  |  |  | 458
Post - Modification Recorded Balance |  |  |  | $ 458
Number of Loans | loan |  |  |  | 1,000
Agricultural land, production and other loans to farmers | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  |  | $ 458
Agricultural land, production and other loans to farmers | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  |  | 0
Agricultural land, production and other loans to farmers | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  |  | 0
Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance | 16 |  | 16 |
Post - Modification Recorded Balance | $ 16 |  | $ 16 |
Number of Loans | loan | 1 |  | 1,000 |
Construction | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | $ 0 |  | $ 0 |
Construction | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | 16 |  | 16 |
Construction | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 0 |
Commercial real estate, non-owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance | 12,922 |  | 12,922 |
Post - Modification Recorded Balance | $ 12,976 |  | $ 12,976 |
Number of Loans | loan | 1 |  | 1,000 |
Commercial real estate, non-owner occupied | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | $ 12,976 |  | $ 12,976 |
Commercial real estate, non-owner occupied | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance | $ 0 |  | 0 |
Commercial real estate, non-owner occupied | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 0 |
Commercial real estate, owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  |  | 21 | 107
Post - Modification Recorded Balance |  |  | $ 21 | $ 107
Number of Loans | loan |  |  | 1,000 | 1,000
Commercial real estate, owner occupied | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | $ 0 | $ 107
Commercial real estate, owner occupied | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 0 | 0
Commercial real estate, owner occupied | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | 21 | 0
Residential |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  | 2,314 | 691 | 2,614
Post - Modification Recorded Balance |  | $ 2,326 | $ 693 | $ 2,663
Number of Loans | loan |  | 30 | 9,000 | 36,000
Residential | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | $ 2,275 | $ 449 | $ 2,276
Residential | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | 51 | 126 | 163
Residential | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  | $ 118 | 224
Home Equity |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  | 307 |  | 307
Post - Modification Recorded Balance |  | $ 307 |  | $ 307
Number of Loans | loan |  | 2 |  | 2,000
Home Equity | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | $ 212 |  | $ 211
Home Equity | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | 95 |  | 96
Home Equity | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  |  | 0
Individuals' loans for household and other personal expenditures |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Pre- Modification Recorded Balance |  | 19 |  | 19
Post - Modification Recorded Balance |  | $ 19 |  | $ 19
Number of Loans | loan |  | 2 |  | 2,000
Individuals' loans for household and other personal expenditures | Term Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | $ 19 |  | $ 19
Individuals' loans for household and other personal expenditures | Rate Modification |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  | $ 0 |  | 0
Individuals' loans for household and other personal expenditures | Combination |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Post - Modification Recorded Balance |  |  |  | $ 0

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