LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES (Amortized Cost Basis by Risk Category ) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Commercial, Financial and Agricultural | Commercial Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	$ 1,210	$ 10,820
Originated two years prior to current fiscal year	10,772	5,537
Originated three years prior to current fiscal year	5,121	11,793
Originated four years prior to current fiscal year	11,185	4,971
Originated five years prior to current fiscal year	4,567	3,975
Originated more than five years prior to current fiscal year	4,400	848
Revolving Loans Amortized Cost Basis	31,923	27,877
Total	69,178	65,821
Commercial, Financial and Agricultural | Commercial Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	1,210	10,750
Originated two years prior to current fiscal year	10,704	5,123
Originated three years prior to current fiscal year	4,735	11,793
Originated four years prior to current fiscal year	11,185	4,971
Originated five years prior to current fiscal year	4,567	3,903
Originated more than five years prior to current fiscal year	4,310	830
Revolving Loans Amortized Cost Basis	28,132	25,582
Total	64,843	62,952
Commercial, Financial and Agricultural | Commercial Portfolio Segment | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year		70
Originated two years prior to current fiscal year	68	414
Originated three years prior to current fiscal year	386
Originated five years prior to current fiscal year		72
Revolving Loans Amortized Cost Basis	3,791	2,295
Total	4,245	2,851
Commercial, Financial and Agricultural | Commercial Portfolio Segment | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated more than five years prior to current fiscal year	18	18
Total	18	18
Commercial, Financial and Agricultural | Commercial Portfolio Segment | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated more than five years prior to current fiscal year	72
Total	72
Commercial Loan | Commercial Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	15,940	36,375
Originated two years prior to current fiscal year	36,572	58,396
Originated three years prior to current fiscal year	57,811	23,561
Originated four years prior to current fiscal year	27,845	24,723
Originated five years prior to current fiscal year	19,606	17,817
Originated more than five years prior to current fiscal year	75,670	59,302
Revolving Loans Amortized Cost Basis	2,983	2,887
Revolving Loans Converted to Term	15	16
Total	236,442	223,077
Commercial Loan | Commercial Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	15,940	36,375
Originated two years prior to current fiscal year	36,572	53,927
Originated three years prior to current fiscal year	53,395	23,561
Originated four years prior to current fiscal year	27,845	15,952
Originated five years prior to current fiscal year	15,691	17,606
Originated more than five years prior to current fiscal year	69,653	53,465
Revolving Loans Amortized Cost Basis	2,788	2,688
Revolving Loans Converted to Term	15	16
Total	221,899	203,590
Commercial Loan | Commercial Portfolio Segment | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated two years prior to current fiscal year		4,469
Originated three years prior to current fiscal year	4,416
Originated four years prior to current fiscal year		3,894
Originated five years prior to current fiscal year	3,915	211
Originated more than five years prior to current fiscal year	5,098	4,909
Revolving Loans Amortized Cost Basis	195	199
Total	13,624	13,682
Commercial Loan | Commercial Portfolio Segment | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated four years prior to current fiscal year		4,877
Originated more than five years prior to current fiscal year	919	928
Total	919	5,805
1-4 family residential construction | Commercial Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	282	1,674
Originated two years prior to current fiscal year	1,305	3,411
Originated three years prior to current fiscal year	3,415
Total	5,002	5,085
1-4 family residential construction | Commercial Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	282	1,674
Originated two years prior to current fiscal year	1,305	3,411
Originated three years prior to current fiscal year	3,412
Total	4,999	5,085
1-4 family residential construction | Commercial Portfolio Segment | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated three years prior to current fiscal year	3
Total	3
Other construction loans | Commercial Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	64	5,254
Originated two years prior to current fiscal year	5,603	7,405
Originated three years prior to current fiscal year	7,792	17,930
Originated four years prior to current fiscal year	13,907	7,011
Originated five years prior to current fiscal year	6,973	276
Originated more than five years prior to current fiscal year	3,341	3,088
Revolving Loans Amortized Cost Basis	7,203	6,390
Revolving Loans Converted to Term	142	150
Total	45,025	47,504
Other construction loans | Commercial Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	64	5,254
Originated two years prior to current fiscal year	5,603	7,405
Originated three years prior to current fiscal year	7,792	17,928
Originated four years prior to current fiscal year	13,907	2,354
Originated five years prior to current fiscal year	2,332	276
Originated more than five years prior to current fiscal year	3,113	3,088
Revolving Loans Amortized Cost Basis	7,203	6,390
Revolving Loans Converted to Term	142	150
Total	40,156	42,845
Other construction loans | Commercial Portfolio Segment | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated three years prior to current fiscal year		2
Originated four years prior to current fiscal year		4,657
Originated five years prior to current fiscal year	4,641
Originated more than five years prior to current fiscal year	228
Total	4,869	4,659
Mortgage Loan | Consumer Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	2,660	27,062
Originated two years prior to current fiscal year	26,247	43,005
Originated three years prior to current fiscal year	42,317	19,173
Originated four years prior to current fiscal year	18,410	14,577
Originated five years prior to current fiscal year	14,050	5,524
Originated more than five years prior to current fiscal year	48,614	44,633
Revolving Loans Amortized Cost Basis	7,859	8,084
Revolving Loans Converted to Term	282	327
Total	160,439	162,385
Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Write-off By Origination Year [Abstract]
Originated more than five years prior to current fiscal year		(19)
Total		(19)
Mortgage Loan | Consumer Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	2,660	27,062
Originated two years prior to current fiscal year	26,247	43,005
Originated three years prior to current fiscal year	42,317	19,173
Originated four years prior to current fiscal year	18,410	14,577
Originated five years prior to current fiscal year	14,050	5,524
Originated more than five years prior to current fiscal year	47,724	44,359
Revolving Loans Amortized Cost Basis	7,859	8,084
Revolving Loans Converted to Term	282	327
Total	159,549	162,111
Mortgage Loan | Consumer Portfolio Segment | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated more than five years prior to current fiscal year	212	218
Total	212	218
Mortgage Loan | Consumer Portfolio Segment | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated more than five years prior to current fiscal year	678	56
Total	678	56
Obligations of State and Political Subdivisions | Commercial Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	1,226
Originated two years prior to current fiscal year	643
Originated three years prior to current fiscal year	3,866
Originated four years prior to current fiscal year	2,283
Originated five years prior to current fiscal year	4,926
Originated more than five years prior to current fiscal year	3,686
Total	16,630
Obligations of State and Political Subdivisions | Commercial Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	1,226
Originated two years prior to current fiscal year	643
Originated three years prior to current fiscal year	3,866
Originated four years prior to current fiscal year	2,283
Originated five years prior to current fiscal year	4,926
Originated more than five years prior to current fiscal year	3,686
Total	16,630
Obligations of State and Political Subdivisions | Consumer Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year		350
Originated two years prior to current fiscal year		3,876
Originated three years prior to current fiscal year		2,413
Originated four years prior to current fiscal year		5,094
Originated five years prior to current fiscal year		12
Originated more than five years prior to current fiscal year		5,486
Revolving Loans Amortized Cost Basis		1
Total		17,232
Obligations of State and Political Subdivisions | Consumer Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year		350
Originated two years prior to current fiscal year		3,876
Originated three years prior to current fiscal year		2,413
Originated four years prior to current fiscal year		5,094
Originated five years prior to current fiscal year		12
Originated more than five years prior to current fiscal year		5,486
Revolving Loans Amortized Cost Basis		1
Total		17,232
Personal Loan | Consumer Portfolio Segment
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	354	2,385
Originated two years prior to current fiscal year	2,044	1,093
Originated three years prior to current fiscal year	906	362
Originated four years prior to current fiscal year	286	87
Originated five years prior to current fiscal year	60	63
Originated more than five years prior to current fiscal year	241	187
Revolving Loans Amortized Cost Basis	87	91
Revolving Loans Converted to Term	22	22
Total	4,000	4,290
Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Write-off By Origination Year [Abstract]
Originated current fiscal year		(4)
Originated two years prior to current fiscal year		(2)
Originated four years prior to current fiscal year		(4)
Originated more than five years prior to current fiscal year	9	(18)
Total	9	(28)
Personal Loan | Consumer Portfolio Segment | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Originated current fiscal year	354	2,385
Originated two years prior to current fiscal year	2,044	1,093
Originated three years prior to current fiscal year	906	362
Originated four years prior to current fiscal year	286	87
Originated five years prior to current fiscal year	60	63
Originated more than five years prior to current fiscal year	241	187
Revolving Loans Amortized Cost Basis	87	91
Revolving Loans Converted to Term	22	22
Total	$ 4,000	$ 4,290