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Loans and Allowance for Credit Losses - Amortized Cost and Unpaid Principal of Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Mar. 31, 2026 | Dec. 31, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | $ 2,386,328 |  | $ 2,295,499 |  |  |
Allowance for credit losses | (25,461) | $ (24,812) | (23,737) | $ (22,585) | $ (20,922) | $ (22,020)
Net loans | 2,360,867 |  | 2,271,762 |  |  |
Unpaid Principal | 2,396,240 |  | 2,305,663 |  |  |
Difference | (9,912) |  | (10,164) |  |  |
Commercial & industrial loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 471,215 |  | 450,826 |  |  |
Allowance for credit losses | (6,228) | (6,371) | (6,707) | (7,508) | (7,387) | (5,800)
Unpaid Principal | 473,342 |  | 453,153 |  |  |
Difference | (2,127) |  | (2,327) |  |  |
Commercial real estate: | Owner occupied properties |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 443,054 |  | 433,157 |  |  |
Allowance for credit losses | (2,623) | (2,498) | (2,207) | (2,271) | (2,442) | (2,944)
Unpaid Principal | 444,880 |  | 435,050 |  |  |
Difference | (1,826) |  | (1,893) |  |  |
Commercial real estate: | Non-owner occupied and multifamily properties |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 769,928 |  | 763,180 |  |  |
Allowance for credit losses | (5,108) | (5,252) | (4,440) | (4,183) | (3,956) | (3,967)
Unpaid Principal | 774,340 |  | 767,617 |  |  |
Difference | (4,412) |  | (4,437) |  |  |
Residential real estate: | 1-4 family residential properties secured by first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 260,301 |  | 243,185 |  |  |
Allowance for credit losses | (6,497) | (6,220) | (5,712) | (4,693) | (4,056) | (4,364)
Unpaid Principal | 260,371 |  | 243,167 |  |  |
Difference | (70) |  | 18 |  |  |
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 | 79,995 |  | 67,116 |  |  |
Allowance for credit losses | (1,308) | (1,083) | (1,041) | (928) | (769) | (775)
Unpaid Principal | 79,125 |  | 66,470 |  |  |
Difference | 870 |  | 646 |  |  |
Residential real estate: | 1-4 family residential construction loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 28,839 |  | 39,059 |  |  |
Allowance for credit losses | (159) | (187) | (324) | (270) | (219) | (230)
Unpaid Principal | 29,053 |  | 39,311 |  |  |
Difference | (214) |  | (252) |  |  |
Other construction, land development and raw land loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 175,656 |  | 173,589 |  |  |
Allowance for credit losses | (2,848) | (2,615) | (2,839) | (2,308) | (1,706) | (3,589)
Unpaid Principal | 177,280 |  | 175,261 |  |  |
Difference | (1,624) |  | (1,672) |  |  |
Obligations of states and political subdivisions in the US |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 39,525 |  | 32,434 |  |  |
Allowance for credit losses | (184) | (140) | (143) | (135) | (123) | (106)
Unpaid Principal | 39,692 |  | 32,433 |  |  |
Difference | (167) |  | 1 |  |  |
Agricultural production, including commercial fishing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 55,833 |  | 47,445 |  |  |
Allowance for credit losses | (240) | (212) | (202) | (197) | (187) | (169)
Unpaid Principal | 56,118 |  | 47,682 |  |  |
Difference | (285) |  | (237) |  |  |
Consumer loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 9,877 |  | 9,763 |  |  |
Allowance for credit losses | (122) | (102) | (114) | (82) | (71) | (71)
Unpaid Principal | 9,758 |  | 9,659 |  |  |
Difference | 119 |  | 104 |  |  |
Other loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost | 52,105 |  | 35,745 |  |  |
Allowance for credit losses | (144) | $ (132) | (8) | $ (10) | $ (6) | $ (5)
Unpaid Principal | 52,281 |  | 35,860 |  |  |
Difference | $ (176) |  | $ (115) |  |  |

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