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LOANS AND ALLOWANCE - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 12,270,233 | $ 12,003,894
Commercial and industrial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 3,531,395 | 3,437,126
Agricultural land, production and other loans to farmers |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 230,003 | 241,793
Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 949,918 | 835,582
Commercial real estate, non-owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,379,819 | 2,407,475
Commercial real estate, owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,179,739 | 1,246,528
Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,248,473 | 2,096,655
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 614,366 | 630,632
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 172,896 | 175,211
Public finance and other commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 963,624 | $ 932,892

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