LOANS AND ALLOWANCE FOR CREDIT LOSSES - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 12,486,027	$ 12,003,894
Commercial and industrial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,670,948	3,437,126
Agricultural land, production and other loans to farmers
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	263,414	241,793
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	957,545	835,582
Commercial real estate, non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,400,839	2,407,475
Commercial real estate, owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,162,083	1,246,528
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,288,921	2,096,655
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	617,571	630,632
Individuals' loans for household and other personal expenditures
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	168,388	175,211
Public finance and other commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 956,318	$ 932,892