LOAN CREDIT QUALITY AND RELATED ALLOWANCE FOR LOAN LOSSES - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in allowance
Beginning Balance	$ 14,176	$ 13,803	$ 11,894
Charge-offs	(849)	(729)	(971)
Recoveries	400	462	255
Provision	1,910	640	2,625
Ending Balance	15,637	14,176	13,803
Commercial, financial, and agricultural
Changes in allowance
Beginning Balance	1,946	1,936	1,779
Charge-offs	(21)	(37)	(64)
Recoveries	186	27	36
Provision	(197)	20	185
Ending Balance	1,914	1,946	1,936
Real estate mortgage: \| Residential
Changes in allowance
Beginning Balance	4,701	4,460	4,306
Charge-offs	(21)	(219)	(254)
Recoveries	47	112	49
Provision	334	348	359
Ending Balance	5,061	4,701	4,460
Real estate mortgage: \| Commercial
Changes in allowance
Beginning Balance	5,336	3,635	3,210
Charge-offs	(154)	(14)	(64)
Recoveries	4	109	0
Provision	924	1,606	489
Ending Balance	6,110	5,336	3,635
Real estate mortgage: \| Construction
Changes in allowance
Beginning Balance	179	134	118
Charge-offs	0	0	0
Recoveries	29	10	11
Provision	(20)	35	5
Ending Balance	188	179	134
Consumer automobile loans
Changes in allowance
Beginning Balance	1,411	1,906	1,780
Charge-offs	(386)	(286)	(396)
Recoveries	58	143	75
Provision	534	(352)	447
Ending Balance	1,617	1,411	1,906
Other consumer installment loans
Changes in allowance
Beginning Balance	111	261	278
Charge-offs	(267)	(173)	(193)
Recoveries	76	61	84
Provision	189	(38)	92
Ending Balance	109	111	261
Unallocated
Changes in allowance
Beginning Balance	492	1,471	423
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	146	(979)	1,048
Ending Balance	$ 638	$ 492	$ 1,471

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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