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LOANS AND ALLOWANCE - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 12,271,422 | $ 12,003,894
Commercial and industrial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 3,490,953 | 3,437,126
Agricultural land, production and other loans to farmers |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 233,838 | 241,793
Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,022,261 | 835,582
Commercial real estate, non-owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,360,596 | 2,407,475
Commercial real estate, owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,153,707 | 1,246,528
Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,257,385 | 2,096,655
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 609,352 | 630,632
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 176,523 | 175,211
Public finance and other commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 966,807 | $ 932,892

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