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Loans - TDR Activity by Loan Category (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) contract | Dec. 31, 2020 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Financing receivable, period of successful payment history used for restructured loan accrual status |  |  | 6 months |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 1 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 179 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 179 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
Number of restructured loans | loan | 5 |  | 5 |  | 7
Total restructured loans | $ 2,762 |  | $ 2,762 |  | $ 3,426
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 3,073 | $ 5,155 | 3,426 | 5,187 |
Additions | 0 | 0 | 0 | 179 |
Principal (reductions) additions | (311) | (584) | (664) | (795) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 2,762 | 4,571 | 2,762 | 4,571 |
Allowance for loan loss | 148 | 402 | 148 | 402 |
Defaults | 0 | 0 | 0 | 0 |
Commercial and Industrial |  |  |  |  |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 9 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | 0 | 0 | 0 | (9) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 0 | 0 | 0 | 0 |
Allowance for loan loss | 0 | 0 | 0 | 0 |
Defaults | 0 | 0 | 0 | $ 0 |
Commercial and Industrial | Commercial and business loans |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  |  |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
Commercial and Industrial | Government program loans |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
Real estate mortgage | Commercial real estate |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 0 | 889 | 0 | 898 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | 0 | (5) | 0 | (14) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 0 | 884 | 0 | 884 |
Allowance for loan loss | 0 | 171 | 0 | 171 |
Defaults | 0 | 0 | 0 | $ 0 |
Real estate mortgage | Residential mortgages |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 359 | 1,037 | 365 | 1,060 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | (212) | (491) | (218) | (514) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 147 | 546 | 147 | 546 |
Allowance for loan loss | 4 | 16 | 4 | 16 |
Defaults | 0 | 0 | 0 | $ 0 |
Real estate mortgage | Home improvement and home equity loans |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 0 | 0 | 0 | 0 |
Allowance for loan loss | 0 | 0 | 0 | 0 |
Defaults | 0 | 0 | 0 | $ 0 |
Real estate construction and development |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 2,335 | 2,536 | 2,452 | 2,654 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | (50) | (50) | (167) | (168) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 2,285 | 2,486 | 2,285 | 2,486 |
Allowance for loan loss | 0 | 0 | 0 | 0 |
Defaults | 0 | 0 | 0 | $ 0 |
Agricultural loans |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 1 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 179 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 179 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 379 | 693 | 609 | 566 |
Additions | 0 | 0 | 0 | 179 |
Principal (reductions) additions | (49) | (38) | (279) | (90) |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 330 | 655 | 330 | 655 |
Allowance for loan loss | 144 | 215 | 144 | 215 |
Defaults | 0 | 0 | 0 | 0 |
Installment and student loans |  |  |  |  |
TDR activity by loan category [Roll Forward] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |
Additions | 0 | 0 | 0 | 0 |
Principal (reductions) additions | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Ending balance | 0 | 0 | 0 | 0 |
Allowance for loan loss | 0 | 0 | 0 | 0 |
Defaults | $ 0 | $ 0 | $ 0 | $ 0 |
Installment and student loans | Installment and student loans |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |
Installment and student loans | Overdraft protection lines |  |  |  |  |
Troubled Debt Restructurings |  |  |  |  |
Number of Contracts | contract |  |  |  | 0 |
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Post- Modification Outstanding Recorded Investment |  |  |  | $ 0 |
Number of Contracts which Defaulted During Period | contract |  |  |  | 0 |
Recorded Investment on Defaulted TDRs |  |  |  | $ 0 |

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