LOANS - Schedule of Non-Accrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 8,920	$ 49,278
Non-accrual loans held-for-sale	20,400
Commercial, financial and agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	3,599	37,418
Real estate – construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	278	66
Real estate – commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	2,977	11,128
Real estate – residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	2,008	618
Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 58	$ 48