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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Troubled Debt Restructurings by Modification Type (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 91,955,000 | $ 48,636,000 |  |
Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 26,372,000 | $ 15,969,000 |  |
% of Total Class of Financing Receivable | 0.49% | 0.25% |  |  | 0.60% | 0.46% |  |
Agricultural land, production and other loans to farmers |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 22,000 | $ 34,000 |  |
% of Total Class of Financing Receivable |  |  |  |  |  | 0.01% |  |
Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 22,915,000 | $ 13,000 |  |
% of Total Class of Financing Receivable | 2.81% |  |  |  | 2.81% | 0.00% |  |
Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 31,492,000 | $ 17,765,000 |  |
% of Total Class of Financing Receivable | 0.94% | 0.50% |  |  | 1.32% | 0.75% |  |
Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 7,523,000 | $ 14,319,000 |  |
% of Total Class of Financing Receivable | 0.51% | 0.60% |  |  | 0.54% | 1.24% |  |
Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 3,379,000 | $ 472,000 |  |
% of Total Class of Financing Receivable | 0.04% |  |  |  | 0.13% | 0.02% |  |
Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 252,000 | $ 63,000 |  |
% of Total Class of Financing Receivable | 0.01% | 0.01% |  |  | 0.03% | 0.01% |  |
Individuals' loans for household and other personal expenditures |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  |  | $ 1,000 |  |
% of Total Class of Financing Receivable |  | 0.00% |  |  |  | 0.00% |  |
Payment Delay |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 10,093,000 | $ 908,000 |  |  | $ 13,011,000 | $ 6,510,000 |  |
Payment Delay | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 9,600,000 | 908,000 |  |  | 11,080,000 | 908,000 |  |
Payment Delay |  | 24,000 |  |  | 180,000 | 24,000 |  |
Payment Delay | Agricultural land, production and other loans to farmers |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  |  | 0 |  |
Payment Delay | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 | 0 |  |
Payment Delay | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 0 | 0 |  |
Payment Delay | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 0 | 5,602,000 |  |
Payment Delay |  |  |  |  |  | 4,500,000 |  |
Payment Delay | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 493,000 |  |  |  | 1,931,000 | 0 |  |
Payment Delay | 8,000 |  |  |  | 26,000 |  |  |
Payment Delay | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 0 | 0 |  |
Payment Delay | Individuals' loans for household and other personal expenditures |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  | 0 |  |  |  | 0 |  |
Payment Delay | Weighted-average | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Payment Delay | 200,000 |  |  |  |  |  |  |
Term Extension |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 27,461,000 | 26,570,000 |  |  | 39,339,000 | 35,397,000 |  |
Term Extension | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 10,333,000 | $ 7,734,000 |  |  | $ 12,880,000 | $ 14,822,000 |  |
Term Extension | 6 months | 8 months |  |  | 9 months | 8 months |  |
Term Extension | Agricultural land, production and other loans to farmers |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  |  | $ 34,000 |  |
Term Extension |  |  |  |  |  | 60 months |  |
Term Extension | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 915,000 |  |  |  | $ 915,000 | $ 13,000 |  |
Term Extension | 6 months |  |  |  | 6 months | 24 months |  |
Term Extension | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 10,254,000 | $ 11,823,000 |  |  | $ 18,933,000 | $ 11,823,000 |  |
Term Extension | 8 months | 11 months |  |  | 13 months | 10 months |  |
Term Extension | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 5,841,000 | $ 6,950,000 |  |  | $ 6,208,000 | $ 8,642,000 |  |
Term Extension | 8 months | 4 months |  |  | 13 months | 4 months |  |
Term Extension | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 56,000 |  |  |  | $ 341,000 | $ 0 |  |
Term Extension | 92 months |  |  |  | 20 months |  |  |
Term Extension | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 62,000 | $ 63,000 |  |  | $ 62,000 | $ 63,000 |  |
Term Extension | 6 months | 5 months |  |  | 6 months | 5 months |  |
Term Extension | Individuals' loans for household and other personal expenditures |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  | $ 0 |  |  |  | $ 0 |  |
Interest Rate Reduction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 247,000 |  |  |
Interest Rate Reduction | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 247,000 |  |  |
Reduced the weighted average contractual interest rate |  |  |  |  | 8.00% |  | 9.00% |
Interest Rate Reduction | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | $ 0 |  |  |
Interest Rate Reduction | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | 0 |  |  |
Interest Rate Reduction | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | 0 |  |  |
Interest Rate Reduction | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | 0 |  |  |
Interest Rate Reduction | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  | 0 |  |  |
Combination Payment Delay & Term Extension |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 22,000,000 | 1,000 |  |  | 22,462,000 | 473,000 |  |
Combination Payment Delay & Term Extension | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 17,000 | 0 |  |
Payment Delay |  |  |  |  | $ 4,900 |  |  |
Term Extension |  |  |  |  | 3 months |  |  |
Combination Payment Delay & Term Extension | Agricultural land, production and other loans to farmers |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  |  | 0 |  |
Combination Payment Delay & Term Extension | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 22,000,000 |  |  |  | $ 22,000,000 | 0 |  |
Payment Delay | $ 475,000 |  |  |  | $ 475,000 |  |  |
Term Extension | 4 months |  |  |  | 4 months |  |  |
Combination Payment Delay & Term Extension | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 0 | 0 |  |  | $ 0 | 0 |  |
Combination Payment Delay & Term Extension | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 0 | 0 |  |
Combination Payment Delay & Term Extension | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 283,000 | 472,000 |  |
Payment Delay |  | $ 300 |  |  | $ 8,000 | $ 3,400 |  |
Term Extension |  | 3 months |  |  | 153 months | 3 months |  |
Combination Payment Delay & Term Extension | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | $ 0 |  |  | $ 162,000 | $ 0 |  |
Payment Delay |  |  |  |  | $ 7,800 | $ 300 |  |
Term Extension |  |  |  |  | 60 months | 3 months |  |
Combination Payment Delay & Term Extension | Individuals' loans for household and other personal expenditures |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  | 1,000 |  |  |  | $ 1,000 |  |
Combination Interest Rate Reduction & Term Extension |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 10,859,000 | 134,000 |  |  | $ 10,859,000 | 6,256,000 |  |
Combination Interest Rate Reduction & Term Extension | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 31,000 | $ 134,000 |  |  | $ 31,000 | $ 239,000 |  |
Term Extension | 48 months | 14 months |  |  | 48 months | 13 months |  |
Reduced the weighted average contractual interest rate | 8.05% | 7.62% | 9.50% | 10.75% | 8.05% | 7.39% | 9.50% | 9.66%
Combination Interest Rate Reduction & Term Extension | Agricultural land, production and other loans to farmers |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  |  |  |  |  | $ 0 |  |
Combination Interest Rate Reduction & Term Extension | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 0 |  |  |  | $ 0 | 0 |  |
Combination Interest Rate Reduction & Term Extension | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 10,828,000 | $ 0 |  |  | $ 10,828,000 | $ 5,942,000 |  |
Term Extension | 8 months |  |  |  | 8 months | 41 months |  |
Reduced the weighted average contractual interest rate | 7.88% |  | 12.38% |  | 7.88% | 7.40% | 12.38% | 7.81%
Combination Interest Rate Reduction & Term Extension | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 0 | 0 |  |  | $ 0 | $ 75,000 |  |
Term Extension |  |  |  |  |  | 114 months |  |
Reduced the weighted average contractual interest rate |  |  |  |  |  | 6.61% |  | 10.25%
Combination Interest Rate Reduction & Term Extension | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 | $ 0 |  |
Combination Interest Rate Reduction & Term Extension | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 | 0 |  |  | 0 | 0 |  |
Combination Interest Rate Reduction & Term Extension | Individuals' loans for household and other personal expenditures |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers |  | $ 0 |  |  |  | $ 0 |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 304,000 |  |  |  | 529,000 |  |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Commercial and industrial loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 |  |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Construction |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 |  |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Commercial real estate, non-owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 |  |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Commercial real estate, owner occupied |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 0 |  |  |  | 0 |  |  |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | 304,000 |  |  |  | 529,000 |  |  |
Payment Delay | $ 14,000 |  |  |  | $ 14,000 |  |  |
Term Extension | 149 months |  |  |  | 91 months |  |  |
Reduced the weighted average contractual interest rate | 3.31% |  | 5.73% |  | 4.03% |  | 5.74% |
Combination Interest Rate Reduction, Term Extension, & Payment Delay | Home equity |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loan Modifications Made to Borrowers | $ 0 |  |  |  | $ 0 |  |  |

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