LOANS - Modifications of Loans Performing (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 3,171,535	$ 2,600,358
Allowance for loan losses, Current Loans	110	128
Allowance for loan losses, Non-Accrual	3,589	1,997
Allowance for loan losses, Total	3,699	2,125
TDRs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	6,417	6,824
Past Due 30-89	160	985
Past due 90 days or more and still accruing	109	167
Non-Accrual	23,794	23,993
Total	30,480	31,969
Commercial financial and agriculture | TDRs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	119	583
Past Due 30-89	39	64
Non-Accrual	1,667	1,062
Total	1,825	1,709
Commercial real estate | TDRs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	4,425	4,299
Past Due 30-89	98	809
Past due 90 days or more and still accruing	109	109
Non-Accrual	19,370	19,991
Total	24,002	25,208
Consumer real estate | TDRs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,844	1,905
Past Due 30-89	23	112
Past due 90 days or more and still accruing		58
Non-Accrual	2,757	2,940
Total	4,624	5,015
Consumer installment | TDRs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	29	37
Total	$ 29	$ 37