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, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	$ 3,732	$ 2,960
Past Due 90 Days or More and Still Accruing	527	45
Nonaccrual	21,000	23,418
PCD	2,678	4,595
Total Past Due, Nonaccrual and PCD	27,937	31,018
Loans held for investment	3,124,924	2,959,553
Nonaccrual and PCD with No ACL	1,795	3,149
PPP Loans	6,300	41,100
Commercial, financial and agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	207	246
Past Due 90 Days or More and Still Accruing	527	0
Nonaccrual	335	190
PCD	0	0
Total Past Due, Nonaccrual and PCD	1,069	436
Loans held for investment	402,619	397,516
Nonaccrual and PCD with No ACL	218	0
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	1,894	453
Past Due 90 Days or More and Still Accruing	0	0
Nonaccrual	17,733	19,445
PCD	1,402	2,082
Total Past Due, Nonaccrual and PCD	21,029	21,980
Loans held for investment	1,810,204	1,683,698
Nonaccrual and PCD with No ACL	1,487	1,661
Consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	1,437	2,140
Past Due 90 Days or More and Still Accruing	0	45
Nonaccrual	2,928	3,776
PCD	1,276	2,512
Total Past Due, Nonaccrual and PCD	5,641	8,473
Loans held for investment	871,051	838,654
Nonaccrual and PCD with No ACL	90	1,488
Consumer installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due 30 to 89 Days	194	121
Past Due 90 Days or More and Still Accruing	0	0
Nonaccrual	4	7
PCD	0	1
Total Past Due, Nonaccrual and PCD	198	129
Loans held for investment	41,050	39,685
Nonaccrual and PCD with No ACL	$ 0	$ 0