LOANS - Summary of Loans Classified as Past Due in Excess of Thirty Days or More and Loans Classified as Non-Accrual (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 3,171,535	$ 2,600,358
Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	9,118	7,757
Past Due 90 Days Or More and Still Accruing	1,009	2,715
Non- Accrual	27,735	26,740
PCI	11,466	12,095
Total Past Due and Non- Accrual and PCI	49,328	49,307
Total Loans	3,171,535	2,600,358
Loans [Member] | Lease financing receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,811	3,095
Loans [Member] | Obligations of states and subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	17,010	20,716
Commercial financial and agriculture | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	2,019	515
Past Due 90 Days Or More and Still Accruing	48	61
Non- Accrual	1,918	2,137
PCI	443	97
Total Past Due and Non- Accrual and PCI	4,428	2,810
Total Loans	629,497	332,600
PPP Loans	259,300
Commercial real estate | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	3,191	2,447
Past Due 90 Days Or More and Still Accruing	378	1,046
Non- Accrual	22,566	22,441
PCI	3,673	3,844
Total Past Due and Non- Accrual and PCI	29,808	29,778
Total Loans	1,401,079	1,387,207
Consumer real estate | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	3,679	4,569
Past Due 90 Days Or More and Still Accruing	578	1,608
Non- Accrual	3,204	1,902
PCI	7,346	8,148
Total Past Due and Non- Accrual and PCI	14,807	16,227
Total Loans	1,078,527	814,282
Consumer installment | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	229	226
Past Due 90 Days Or More and Still Accruing	5
Non- Accrual	47	260
PCI	4	6
Total Past Due and Non- Accrual and PCI	285	492
Total Loans	$ 42,611	$ 42,458