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Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | $ 1,535,187 | $ 1,501,785 |  |
Allowance for credit losses | (14,157) | (13,838) | $ (11,310) | $ (11,739)
Net loans | 1,521,030 | 1,487,947 |  |
Unpaid Principal | 1,543,812 | 1,510,395 |  |
Difference | (8,625) | (8,610) |  |
Commercial & industrial loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 364,109 | 358,128 |  |
Allowance for credit losses | (3,080) | (2,914) | (2,901) | (3,027)
Unpaid Principal | 365,824 | 359,900 |  |
Difference | (1,715) | (1,772) |  |
Commercial real estate | Owner occupied properties |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 343,162 | 349,973 |  |
Allowance for credit losses | (2,778) | (3,094) | (2,513) | (3,176)
Unpaid Principal | 344,734 | 351,580 |  |
Difference | (1,572) | (1,607) |  |
Commercial real estate | Non-owner occupied and multifamily properties |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 473,227 | 482,270 |  |
Allowance for credit losses | (3,174) | (3,615) | (3,063) | (2,930)
Unpaid Principal | 476,897 | 486,021 |  |
Difference | (3,670) | (3,751) |  |
Residential real estate | 1-4 family residential properties secured by first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 112,214 | 73,381 |  |
Allowance for credit losses | (2,226) | (1,413) | (510) | (439)
Unpaid Principal | 112,758 | 73,674 |  |
Difference | (544) | (293) |  |
Residential real estate | 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 23,027 | 20,259 |  |
Allowance for credit losses | (392) | (389) | (301) | (215)
Unpaid Principal | 22,864 | 20,103 |  |
Difference | 163 | 156 |  |
Residential real estate | 1-4 family residential construction loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 40,652 | 44,000 |  |
Allowance for credit losses | (260) | (312) | (210) | (120)
Unpaid Principal | 40,881 | 44,314 |  |
Difference | (229) | (314) |  |
Other construction, land development and raw land loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 91,712 | 99,182 |  |
Allowance for credit losses | (1,925) | (1,803) | (1,550) | (1,635)
Unpaid Principal | 92,615 | 100,075 |  |
Difference | (903) | (893) |  |
Obligations of states and political subdivisions in the US |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 42,257 | 32,539 |  |
Allowance for credit losses | (106) | (79) | (52) | (32)
Unpaid Principal | 42,258 | 32,540 |  |
Difference | (1) | (1) |  |
Agricultural production, including commercial fishing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 37,429 | 34,099 |  |
Allowance for credit losses | (150) | (145) | (128) | (91)
Unpaid Principal | 37,615 | 34,263 |  |
Difference | (186) | (164) |  |
Consumer loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 4,661 | 4,335 |  |
Allowance for credit losses | (61) | (68) | (75) | (67)
Unpaid Principal | 4,617 | 4,293 |  |
Difference | 44 | 42 |  |
Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost | 2,737 | 3,619 |  |
Allowance for credit losses | (5) | (6) | $ (7) | $ (7)
Unpaid Principal | 2,749 | 3,632 |  |
Difference | $ (12) | $ (13) |  |

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