| Fair Value, by Balance Sheet Grouping [Table Text Block] |
| | September 30, 2026 | |
| | | | | | Fair Value Measurements | |
| | Carrying Amount | | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | | Significant Observable Inputs (Level 2) | | | Significant Unobservable Inputs (Level 3) | | | Total | |
Financial assets: | | | | | | | | | | | | | | | | | | | | |
Cash and cash equivalents | | $ | 138,307 | | | $ | 138,307 | | | $ | — | | | $ | — | | | $ | 138,307 | |
Securities available-for-sale | | $ | 584,897 | | | $ | — | | | $ | 583,474 | | | $ | 1,423 | | | $ | 584,897 | |
Securities held-to-maturity, net | | $ | 277,577 | | | $ | — | | | $ | 247,495 | | | $ | — | | | $ | 247,495 | |
Loans held for investment, net | | $ | 2,406,861 | | | $ | — | | | $ | — | | | $ | 2,293,087 | | | $ | 2,293,087 | |
| | | | | | | | | | | | | | | | | | | | |
Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
Deposits | | $ | 2,984,741 | | | $ | 1,055,117 | | | $ | 1,927,297 | | | $ | — | | | $ | 2,982,414 | |
Repurchase agreements | | $ | 113,088 | | | $ | — | | | $ | 86,533 | | | $ | — | | | $ | 86,533 | |
Other borrowings | | $ | 52,000 | | | $ | — | | | $ | 51,403 | | | $ | — | | | $ | 51,403 | |
Long-term debt, net | | $ | 49,551 | | | $ | — | | | $ | 49,131 | | | $ | — | | | $ | 49,131 | |
Subordinated debentures | | $ | 36,151 | | | $ | — | | | $ | 35,050 | | | $ | — | | | $ | 35,050 | |
| | December 31, 2025 | |
| | | | | | Fair Value Measurements | |
| | Carrying
Amount | | | Quoted Prices in
Active Markets for
Identical Assets
(Level 1) | | | Significant
Observable
Inputs
(Level 2) | | | Significant
Unobservable
Inputs
(Level 3) | | | Total | |
Financial assets: | | | | | | | | | | | | | | | | | | | | |
Cash and cash equivalents | | $ | 135,628 | | | $ | 135,628 | | | $ | — | | | $ | — | | | $ | 135,628 | |
Securities available-for-sale | | $ | 625,330 | | | $ | — | | | $ | 624,017 | | | $ | 1,313 | | | $ | 625,330 | |
Securities held-to-maturity, net | | $ | 290,811 | | | $ | — | | | $ | 286,461 | | | $ | — | | | $ | 286,461 | |
Loans held for investment, net | | $ | 2,525,365 | | | $ | — | | | $ | — | | | $ | 2,428,691 | | | $ | 2,428,691 | |
| | | | | | | | | | | | | | | | | | | | |
Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
Deposits | | $ | 2,876,436 | | | $ | 995,623 | | | $ | 1,992,616 | | | $ | — | | | $ | 2,988,239 | |
Repurchase agreements | | $ | 130,853 | | | $ | — | | | $ | 107,084 | | | $ | — | | | $ | 107,084 | |
Other borrowings | | $ | 302,700 | | | $ | — | | | $ | 302,629 | | | $ | — | | | $ | 302,629 | |
Long-term debt, net | | $ | 49,483 | | | $ | — | | | $ | 49,472 | | | $ | — | | | $ | 49,472 | |
Subordinated debentures | | $ | 36,017 | | | $ | — | | | $ | 36,276 | | | $ | — | | | $ | 36,276 | |
|
| Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| | Fair Value Measurements at September 30, 2026, using | | | | | |
| | Quoted Prices in Active Markets for Identical Assets (Level 1) | | | Significant Observable Inputs (Level 2) | | | Significant Unobservable Inputs (Level 3) | | | Total | | | Realized Gain/(Loss) (Level 3) | |
Securities: | | | | | | | | | | | | | | | | | | | | |
U.S. government agencies | | $ | — | | | $ | 22,678 | | | $ | — | | | $ | 22,678 | | | $ | — | |
Mortgage-backed securities | | | — | | | | 272,334 | | | | — | | | | 272,334 | | | | — | |
State and political subdivisions | | | — | | | | 47,511 | | | | — | | | | 47,511 | | | | — | |
Corporate bonds | | | — | | | | 82,413 | | | | 1,423 | | | | 83,836 | | | | — | |
Collateralized loan obligations | | | — | | | | 158,538 | | | | — | | | | 158,538 | | | | — | |
Total available-for-sale securities | | $ | — | | | $ | 583,474 | | | $ | 1,423 | | | $ | 584,897 | | | $ | — | |
| | Fair Value Measurements at December 31, 2025, using | | | | | |
| | Quoted Prices in Active Markets for Identical Assets (Level 1) | | | Significant Observable Inputs (Level 2) | | | Significant Unobservable Inputs (Level 3) | | | Total | | | Realized Gain/(Loss) (Level 3) | |
Securities: | | | | | | | | | | | | | | | | | | | | |
U.S. government agencies | | $ | — | | | $ | 32,901 | | | $ | — | | | $ | 32,901 | | | $ | — | |
Mortgage-backed securities | | | — | | | | 259,760 | | | | — | | | | 259,760 | | | | — | |
State and political subdivisions | | | — | | | | 46,921 | | | | — | | | | 46,921 | | | | — | |
Corporate bonds | | | — | | | | 85,154 | | | | 1,313 | | | | 86,467 | | | | — | |
Collateralized loan obligations | | | — | | | | 199,281 | | | | — | | | | 199,281 | | | | — | |
Total available-for-sale securities | | $ | — | | | $ | 624,017 | | | $ | 1,313 | | | $ | 625,330 | | | $ | — | |
|
| Fair Value Measurements, Nonrecurring [Table Text Block] |
| | Fair Value Measurements at December 31, 2025, using | |
| | | | | | | | | | | | | | | | |
| | Quoted Prices in Active Markets for Identical Assets (Level 1) | | | Significant Observable Inputs (Level 2) | | | Significant Unobservable Inputs (Level 3) | | | Total | |
Individually evaluated collateral dependent loans | | | | | | | | | | | | | | | | |
Real estate: | | | | | | | | | | | | | | | | |
Farmland | | $ | — | | | $ | — | | | $ | 1,699 | | | $ | 1,699 | |
Total real estate | | | — | | | | — | | | | 1,699 | | | | 1,699 | |
Other commercial | | | — | | | | — | | | | 1,183 | | | | 1,183 | |
Total collateral dependent loans | | | — | | | | — | | | | 2,882 | | | | 2,882 | |
Foreclosed assets | | | — | | | | — | | | | 1,565 | | | | 1,565 | |
Total assets measured on a nonrecurring basis | | $ | | | | $ | | | | $ | 4,447 | | | $ | 4,447 | |
|