LOANS - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Allowance for loan losses:
Beginning balance	$ 52,450	$ 31,620	$ 38,917	$ 30,742
Initial allowance on PCD loans			3,176
Provision for credit losses	1,000	450	11,500	450
Loans charged-off	(1,126)	(426)	(1,466)	(657)
Recoveries	290	756	487	1,865
Total ending allowance balance	52,614	32,400	52,614	32,400
Heritage Southeast Bank
Allowance for loan losses:
Initial allowance on PCD loans	3,200
Provision for credit losses			10,700
Commercial, financial and agriculture
Allowance for loan losses:
Beginning balance	9,443	4,874	6,349	4,873
Initial allowance on PCD loans			727
Provision for credit losses	(64)	(313)	2,263	(313)
Loans charged-off	(421)	(94)	(424)	(146)
Recoveries	14	44	57	97
Total ending allowance balance	8,972	4,511	8,972	4,511
Commercial real estate
Allowance for loan losses:
Beginning balance	28,052	17,773	20,389	17,552
Initial allowance on PCD loans			2,260
Provision for credit losses	603	629	5,991	629
Loans charged-off	0	(24)	0	(27)
Recoveries	71	290	86	514
Total ending allowance balance	28,726	18,668	28,726	18,668
Consumer real estate
Allowance for loan losses:
Beginning balance	14,201	8,492	11,599	7,889
Initial allowance on PCD loans			182
Provision for credit losses	(118)	62	2,284	62
Loans charged-off	(24)	(140)	(24)	(147)
Recoveries	64	338	82	948
Total ending allowance balance	14,123	8,752	14,123	8,752
Consumer installment
Allowance for loan losses:
Beginning balance	754	481	580	428
Initial allowance on PCD loans			7
Provision for credit losses	579	72	962	72
Loans charged-off	(681)	(168)	(1,018)	(337)
Recoveries	141	84	262	306
Total ending allowance balance	$ 793	$ 469	$ 793	$ 469