LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 67,358	$ 73,773
Nonaccrual Loans with no Allowance for Credit Losses	27,515	39,644
Commercial and industrial loans
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	7,175	8,090
Nonaccrual Loans with no Allowance for Credit Losses	1,132	4,937
Agricultural land, production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	19	75
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Construction
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	15,063	24,629
Nonaccrual Loans with no Allowance for Credit Losses	13,446	22,650
Commercial real estate, non-owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	10,872	12,118
Nonaccrual Loans with no Allowance for Credit Losses	7,539	10,153
Commercial real estate, owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	9,169	2,440
Nonaccrual Loans with no Allowance for Credit Losses	5,398	1,904
Residential
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	21,684	21,491
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	3,333	4,924
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	43	6
Nonaccrual Loans with no Allowance for Credit Losses	$ 0	$ 0