LOAN CREDIT QUALITY AND RELATED ALLOWANCE FOR LOAN LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 1,023	$ 1,035
Collectively evaluated for impairment	13,153	12,768
Total ending allowance balance	14,176	13,803	$ 11,894	$ 13,837
Loans:
Individually evaluated for impairment	13,985	16,683
Collectively evaluated for impairment	1,377,861	1,326,621
Total	1,391,846	1,343,304
Commercial, financial, and agricultural
Ending allowance balance attributable to loans:
Individually evaluated for impairment	2	0
Collectively evaluated for impairment	1,944	1,936
Total ending allowance balance	1,946	1,936	1,779	1,680
Loans:
Individually evaluated for impairment	889	865
Collectively evaluated for impairment	162,396	163,878
Total	163,285	164,743
Real estate mortgage: \| Residential
Ending allowance balance attributable to loans:
Individually evaluated for impairment	201	224
Collectively evaluated for impairment	4,500	4,236
Total ending allowance balance	4,701	4,460	4,306	5,616
Loans:
Individually evaluated for impairment	5,052	6,317
Collectively evaluated for impairment	590,795	583,404
Total	595,847	589,721
Real estate mortgage: \| Commercial
Ending allowance balance attributable to loans:
Individually evaluated for impairment	800	811
Collectively evaluated for impairment	4,536	2,824
Total ending allowance balance	5,336	3,635	3,210	4,047
Loans:
Individually evaluated for impairment	7,919	9,377
Collectively evaluated for impairment	438,815	363,811
Total	446,734	373,188
Real estate mortgage: \| Construction
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	179	134
Total ending allowance balance	179	134	118	143
Loans:
Individually evaluated for impairment	105	124
Collectively evaluated for impairment	37,190	39,185
Total	37,295	39,309
Consumer automobile loans
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,411	1,906
Total ending allowance balance	1,411	1,906	1,780	1,328
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	139,408	156,403
Total	139,408	156,403
Other consumer installment loans
Ending allowance balance attributable to loans:
Individually evaluated for impairment	20	0
Collectively evaluated for impairment	91	261
Total ending allowance balance	111	261	278	259
Loans:
Individually evaluated for impairment	20	0
Collectively evaluated for impairment	9,257	19,940
Total	9,277	19,940
Unallocated
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	492	1,471
Total ending allowance balance	$ 492	$ 1,471	$ 423	$ 764

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

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Amount, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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