LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans Accounted for on a Nonaccrual Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	$ 151,117	$ 134,808
Financing receivable, nonaccrual, no allowance	86,577	60,231
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	8,059	11,094
Financing receivable, nonaccrual, no allowance	2,049	33
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	1,153	420
Indirect automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	299	346
Real estate – construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	282	523
Real estate – commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	11,295	13,203
Financing receivable, nonaccrual, no allowance	9,109	1,464
Real estate – residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	130,029	109,222
Financing receivable, nonaccrual, no allowance	75,419	58,734
Real estate – residential | GNMA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	$ 90,200	$ 69,600