LOANS AND ALLOWANCE - Payment Status (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	$ 27,612	$ 47,367
30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	1	1,269
Commercial and industrial loans | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	8,776	15,863
Commercial and industrial loans | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	0	106
Agricultural land, production and other loans to farmers | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		34
Agricultural land, production and other loans to farmers | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		0
Construction | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		13
Construction | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		0
Commercial real estate, non-owner occupied | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	11,823	17,765
Commercial real estate, non-owner occupied | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	0	0
Commercial real estate, owner occupied | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	6,950	13,157
Commercial real estate, owner occupied | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	0	1,162
Residential | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		472
Residential | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers		0
Home equity | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	63	63
Home equity | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	0	0
Individuals' loans for household and other personal expenditures | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	0	0
Individuals' loans for household and other personal expenditures | 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan Modifications Made to Borrowers	$ 1	$ 1