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Loans and Allowance for Credit Losses - Summary of charge-offs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, Total | $ 108 | $ 674 | $ 365 | $ 719
Commercial |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, 2023 |  |  | 39 |
Current period gross charge-off, 2021 |  |  | 25 |
Current period gross charge-off, 2020 |  |  | 9 |
Current period gross charge-off, 2019 |  |  | 187 |
Current period gross charge-off, Total | 85 | 637 | 260 | 664
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, 2023 |  |  | 39 |
Current period gross charge-off, 2021 |  |  | 25 |
Current period gross charge-off, 2020 |  |  | 9 |
Current period gross charge-off, 2019 |  |  | 187 |
Current period gross charge-off, Total | 85 | 637 | 260 | 664
Consumer |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, 2022 |  |  | 2 |
Current period gross charge-off, 2020 |  |  | 21 |
Current period gross charge-off, 2019 |  |  | 4 |
Current period gross charge-off, Prior |  |  | 78 |
Current period gross charge-off, Total | 23 | 37 | 105 | 55
Consumer | Other revolving and installment |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, 2022 |  |  | 2 |
Current period gross charge-off, 2020 |  |  | 21 |
Current period gross charge-off, 2019 |  |  | 4 |
Current period gross charge-off, Prior |  |  | 1 |
Current period gross charge-off, Total | $ 23 | $ 37 | 28 | $ 55
Consumer | Real estate junior lien |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, Prior |  |  | 77 |
Current period gross charge-off, Total |  |  | 77 |
Consumer | Real estate junior lien | Residential |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Write-off, by Origination Year [Abstract] |  |  |  |
Current period gross charge-off, Total |  |  | $ 77 |

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