LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans Accounted for on a Nonaccrual Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	$ 134,808	$ 85,266
Financing receivable, nonaccrual, no allowance	60,231	32,042
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	11,094	14,214
Financing receivable, nonaccrual, no allowance	33	262
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	420	476
Indirect automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	346	947
Real estate – construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	523	492
Financing receivable, nonaccrual, no allowance	0	209
Real estate – commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	13,203	15,365
Financing receivable, nonaccrual, no allowance	1,464	2,015
Real estate – residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	109,222	53,772
Financing receivable, nonaccrual, no allowance	58,734	29,556
Real estate – residential | GNMA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	$ 69,600	$ 30,400