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Loans and Allowance for Credit Losses - Collateral dependent loans and related ACL (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023
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Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | $ 4,027,181 |  | $ 3,850,035 |  |  |
Related allowance for credit losses | 54,740 | $ 54,437 | 52,516 | $ 50,084 | $ 49,122 | $ 47,820
Construction and land development |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 393,388 |  |  |  |  |
Agriculture real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 239,912 |  |  |  |  |
Commercial and industrial |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 484,799 |  | 450,147 |  |  |
Related allowance for credit losses | 8,063 | 6,114 | 6,233 | 5,850 | 5,134 | 5,235
Agriculture production |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 188,284 |  | 175,968 |  |  |
Related allowance for credit losses | 1,060 | 784 | 835 | 570 | 697 | 782
Consumer |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 56,017 |  | 59,671 |  |  |
Related allowance for credit losses | 603 | 526 | 578 | 454 | 453 | 490
All other loans |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 3,628 |  | 3,981 |  |  |
Related allowance for credit losses | 24 | 14 | 17 | 17 | 16 | 21
Secured by real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Related allowance for credit losses | 12,664 | 10,637 |  | 9,574 | 9,371 |
Secured by real estate | 1-4 residential real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 967,196 |  | 925,397 |  |  |
Related allowance for credit losses | 12,664 |  | 10,528 | 9,574 |  | 9,474
Secured by real estate | 1-4 residential real estate | Non-owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Related allowance for credit losses | 13,660 | 20,728 |  |  |  |
Secured by real estate | Commercial Real Estate | Non-owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 882,484 |  | 899,770 |  |  |
Related allowance for credit losses | 13,660 |  | 19,055 | 16,599 | 16,504 | 13,863
Secured by real estate | Commercial Real Estate | Owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 435,392 |  | 427,476 |  |  |
Related allowance for credit losses | 5,707 | 4,814 | 4,815 | 4,814 | 4,879 | 5,168
Secured by real estate | Multi-family real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 376,081 |  | 384,564 |  |  |
Related allowance for credit losses | 5,725 | 5,118 | 5,447 | 6,188 | 6,097 | 6,806
Secured by real estate | Construction and land development |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 393,388 |  | 290,541 |  |  |
Related allowance for credit losses | 4,717 | 3,675 | 2,901 | 3,639 | 3,545 | 3,414
Secured by real estate | Agriculture real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 239,912 |  | 232,520 |  |  |
Related allowance for credit losses | 2,517 | $ 2,027 | 2,107 | $ 2,379 | $ 2,426 | $ 2,567
Commercial Real Estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 23,642 |  | 23,457 |  |  |
Commercial Real Estate | Commercial Real Estate | Non-owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 23,099 |  | 23,457 |  |  |
Commercial Real Estate | Commercial Real Estate | Owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 543 |  |  |  |  |
Residential Real Estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 784 |  | 797 |  |  |
Residential Real Estate | 1-4 residential real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 784 |  | 797 |  |  |
Construction and Land Development |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 961 |  |  |  |  |
Construction and Land Development | Construction and land development |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 961 |  |  |  |  |
Other |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 2,386 |  | 2,705 |  |  |
Other | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 2,386 |  | 2,705 |  |  |
Collateral Pledged |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 27,773 |  | 26,959 |  |  |
Related allowance for credit losses | 4,742 |  | 10,926 |  |  |
Collateral Pledged | 1-4 residential real estate |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 784 |  | 797 |  |  |
Related allowance for credit losses | 103 |  | 116 |  |  |
Collateral Pledged | Commercial Real Estate | Non-owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 23,099 |  | 23,457 |  |  |
Related allowance for credit losses | 3,604 |  | 10,175 |  |  |
Collateral Pledged | Commercial Real Estate | Owner occupied |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 543 |  |  |  |  |
Related allowance for credit losses | 208 |  |  |  |  |
Collateral Pledged | Construction and land development |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 961 |  |  |  |  |
Collateral Pledged | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |  |
Total Loans Receivable | 2,386 |  | 2,705 |  |  |
Related allowance for credit losses | $ 827 |  | $ 635 |  |  |

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