LOANS - Loans Accounted for on a Nonaccrual Basis (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 77,866,000	$ 75,124,000
Financing receivable, nonaccrual, no allowance	3,382,000
Interest income on nonaccrual loans	0
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	10,457,000	9,236,000
Consumer installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	897,000	831,000
Indirect automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	1,732,000	1,746,000
Premium finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	579,000	600,000
Real estate – construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,437,000	1,988,000
Real estate – commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	26,575,000	23,797,000
Financing receivable, nonaccrual, no allowance	610,000
Real estate – residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	35,189,000	$ 36,926,000
Financing receivable, nonaccrual, no allowance	$ 2,772,000