LOANS AND ALLOWANCE FOR CREDIT LOSSES - Activity in allowance for credit losses (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Allowance, Beginning balance	$ 7,687,000	$ 7,157,000	$ 6,925,000	$ 8,274,000	$ 8,274,000
Charge-offs	(750,000)	(5,000)	(783,000)	(43,000)	(57,000)
Recoveries	2,000	35,000	23,000	41,000	44,000
(Credit) Provision	718,000	(370,000)	1,492,000	(336,000)	(217,000)
Allowance, Ending Balance	7,657,000	6,817,000	7,657,000	6,817,000	6,925,000
Total	934,599,000	881,038,000	934,599,000	881,038,000	911,078,000
Reserve For Unfunded Lending Commitments	173,000	233,000	173,000	233,000
Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments	173,000		173,000		166,000
Reserve For Unfunded Lending Commitments	173,000	233,000	173,000	233,000	166,000	$ 68,000
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				7,155,000	7,155,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				(1,119,000)	(1,119,000)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments						$ 147,000
Loans Individually Evaluated For Impairment [Member]
Total	3,868,000	5,318,000	3,868,000	5,318,000	4,925,000
Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			6,925,000
Allowance, Ending Balance	7,657,000	6,817,000	7,657,000	6,817,000	6,925,000
Total	930,731,000	875,720,000	930,731,000	875,720,000	906,153,000
Real Estate
Allowance, Beginning balance	7,206,000	6,754,000	6,539,000	7,483,000	7,483,000
Charge-offs	(237,000)		(237,000)
Recoveries		34,000	19,000	36,000	37,000
(Credit) Provision	194,000	(315,000)	842,000	(329,000)	(264,000)
Allowance, Ending Balance	7,163,000	6,473,000	7,163,000	6,473,000	6,539,000
Total	836,213,000	784,126,000	836,213,000	784,126,000	811,493,000
Reserve For Unfunded Lending Commitments	149,000	207,000	149,000	207,000
Real Estate | Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments					140,000
Real Estate | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				6,766,000	6,766,000
Real Estate | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				(717,000)	(717,000)
Real Estate | Loans Individually Evaluated For Impairment [Member]
Total	3,452,000	4,385,000	3,452,000	4,385,000	4,005,000
Real Estate | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			6,539,000
Allowance, Ending Balance	7,163,000	6,473,000	7,163,000	6,473,000	6,539,000
Total	832,761,000	779,741,000	832,761,000	779,741,000	807,488,000
Agricultural
Allowance, Beginning balance	2,000	1,000	1,000	6,000	6,000
(Credit) Provision			1,000	(1,000)	(1,000)
Allowance, Ending Balance	2,000	1,000	2,000	1,000	1,000
Total	1,008,000	708,000	1,008,000	708,000	671,000
Agricultural | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				2,000	2,000
Agricultural | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				(4,000)	(4,000)
Agricultural | Loans Individually Evaluated For Impairment [Member]
Total	309,000	309,000	309,000	309,000	309,000
Agricultural | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			1,000
Allowance, Ending Balance	2,000	1,000	2,000	1,000	1,000
Total	699,000	399,000	699,000	399,000	362,000
Commercial and Industrial
Allowance, Beginning balance	325,000	268,000	265,000	504,000	504,000
Charge-offs	(504,000)		(504,000)
Recoveries			1,000	2,000	2,000
(Credit) Provision	518,000	(42,000)	577,000	(19,000)	20,000
Allowance, Ending Balance	339,000	226,000	339,000	226,000	265,000
Total	66,804,000	62,866,000	66,804,000	62,866,000	66,909,000
Reserve For Unfunded Lending Commitments	23,000	25,000	23,000	25,000
Commercial and Industrial | Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments					25,000
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				243,000	243,000
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				(261,000)	(261,000)
Commercial and Industrial | Loans Individually Evaluated For Impairment [Member]
Total	107,000	624,000	107,000	624,000	611,000
Commercial and Industrial | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			265,000
Allowance, Ending Balance	339,000	226,000	339,000	226,000	265,000
Total	66,697,000	62,242,000	66,697,000	62,242,000	66,298,000
Consumer
Allowance, Beginning balance	91,000	89,000	78,000	84,000	84,000
Charge-offs	(9,000)	(5,000)	(42,000)	(43,000)	(57,000)
Recoveries	2,000	1,000	3,000	3,000	5,000
(Credit) Provision	10,000	(12,000)	55,000	18,000	35,000
Allowance, Ending Balance	94,000	73,000	94,000	73,000	78,000
Total	6,166,000	6,218,000	6,166,000	6,218,000	5,824,000
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				95,000	95,000
Consumer | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				11,000	11,000
Consumer | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			78,000
Allowance, Ending Balance	94,000	73,000	94,000	73,000	78,000
Total	6,166,000	6,218,000	6,166,000	6,218,000	5,824,000
State and Political Subdivisions
Allowance, Beginning balance	63,000	45,000	42,000	197,000	197,000
(Credit) Provision	(4,000)	(1,000)	17,000	(5,000)	(7,000)
Allowance, Ending Balance	59,000	44,000	59,000	44,000	42,000
Total	24,408,000	27,120,000	24,408,000	27,120,000	26,181,000
Reserve For Unfunded Lending Commitments	1,000	1,000	1,000	1,000
State and Political Subdivisions | Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments					1,000
State and Political Subdivisions | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance				49,000	49,000
State and Political Subdivisions | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance				(148,000)	(148,000)
State and Political Subdivisions | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance			42,000
Allowance, Ending Balance	59,000	44,000	59,000	44,000	42,000
Total	$ 24,408,000	$ 27,120,000	$ 24,408,000	$ 27,120,000	$ 26,181,000