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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 12,646,808 | $ 12,486,027
Commercial and industrial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 4,041,217 | 3,670,948
Agricultural land, production and other loans to farmers |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 238,743 | 263,414
Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 814,704 | 957,545
Commercial real estate, non-owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,251,351 | 2,400,839
Commercial real estate, owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,152,751 | 1,162,083
Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,366,943 | 2,288,921
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 641,188 | 617,571
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 158,480 | 168,388
Public finance and other commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 981,431 | $ 956,318

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