LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Allowance for loan losses:
Beginning balance	$ 55,133	$ 52,614	$ 54,032	$ 38,917	$ 38,917
Initial allowance on PCD loans				3,176	3,176
Provision for credit losses	1,000	1,000	2,650	12,500
Loans charged-off	(1,386)	(629)	(2,922)	(2,095)	(3,092)
Recoveries	953	580	1,940	1,067
Total ending allowance balance	55,700	53,565	55,700	53,565	54,032
Commercial, financial and agriculture
Allowance for loan losses:
Beginning balance	8,731	8,972	8,844	6,349	6,349
Initial allowance on PCD loans				727	727
Provision for credit losses	349	(709)	652	1,554
Loans charged-off	(404)	(48)	(832)	(472)	(745)
Recoveries	232	277	244	334
Total ending allowance balance	8,908	8,492	8,908	8,492	8,844
Commercial real estate
Allowance for loan losses:
Beginning balance	30,101	28,726	29,125	20,389	20,389
Initial allowance on PCD loans				2,260	2,260
Provision for credit losses	565	389	1,093	6,380
Loans charged-off	0	(27)	(91)	(27)	(250)
Recoveries	18	15	557	101
Total ending allowance balance	30,684	29,103	30,684	29,103	29,125
Consumer real estate
Allowance for loan losses:
Beginning balance	15,560	14,123	15,260	11,599	11,599
Initial allowance on PCD loans				182	182
Provision for credit losses	(67)	919	493	3,203
Loans charged-off	(81)	(21)	(375)	(45)	(49)
Recoveries	22	142	56	224
Total ending allowance balance	15,434	15,163	15,434	15,163	15,260
Consumer installment
Allowance for loan losses:
Beginning balance	741	793	803	580	580
Initial allowance on PCD loans				7	7
Provision for credit losses	153	401	412	1,363
Loans charged-off	(901)	(533)	(1,624)	(1,551)	(2,048)
Recoveries	681	146	1,083	408
Total ending allowance balance	$ 674	$ 807	$ 674	$ 807	$ 803