LOANS AND ALLOWANCE - Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 62,478	$ 53,580
Nonaccrual Loans with no Allowance for Credit Losses	12,891	14,367
Commercial and industrial loans
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	7,140	9,050
Nonaccrual Loans with no Allowance for Credit Losses	305	1,015
Agricultural land, production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	56	58
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Construction
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	520
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Commercial real estate, non-owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	23,213	11,932
Nonaccrual Loans with no Allowance for Credit Losses	10,650	11,095
Commercial real estate, owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	2,687	3,041
Nonaccrual Loans with no Allowance for Credit Losses	1,936	2,257
Residential
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	25,900	25,140
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	3,449	3,820
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Individuals' loans for household and other personal expenditures
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	33	19
Nonaccrual Loans with no Allowance for Credit Losses	$ 0	$ 0