LOANS AND ALLOWANCE FOR CREDIT LOSSES - Activity in allowance for credit losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allowance, Beginning balance	$ 8,274,000	$ 8,680,000
Charge-offs	(57,000)	(206,000)
Recoveries	44,000	64,000
(Credit) Provision	(217,000)	(264,000)
Allowance, Ending Balance	6,925,000	8,274,000
Total	911,078,000	858,469,000
Reserve For Unfunded Lending Commitments	166,000
Ending Balance	911,078,000	858,469,000
Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments	166,000	68,000
Reserve For Unfunded Lending Commitments	166,000	68,000
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	7,155,000
Allowance, Ending Balance		7,155,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	(1,119,000)
Allowance, Ending Balance		(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	4,925,000	11,207,000
Ending Balance	4,925,000	11,207,000
Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance	8,274,000
Allowance, Ending Balance	6,925,000	8,274,000
Total	906,153,000	847,262,000
Ending Balance	906,153,000	847,262,000
Real Estate
Allowance, Beginning balance	7,483,000
Recoveries	37,000
(Credit) Provision	(264,000)
Allowance, Ending Balance	6,539,000	7,483,000
Total	811,493,000	764,880,000
Reserve For Unfunded Lending Commitments	140,000
Ending Balance	811,493,000	764,880,000
Real Estate | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	6,766,000
Allowance, Ending Balance		6,766,000
Real Estate | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	(717,000)
Allowance, Ending Balance		(717,000)
Real Estate | Loans Individually Evaluated For Impairment [Member]
Total	4,005,000
Ending Balance	4,005,000
Real Estate | Loans Collectively Evaluated For Impairment [Member]
Allowance, Ending Balance	6,539,000
Total	807,488,000
Ending Balance	807,488,000
Agricultural
Allowance, Beginning balance	6,000
(Credit) Provision	(1,000)
Allowance, Ending Balance	1,000	6,000
Total	671,000	860,000
Ending Balance	671,000	860,000
Agricultural | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	2,000
Allowance, Ending Balance		2,000
Agricultural | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	(4,000)
Allowance, Ending Balance		(4,000)
Agricultural | Loans Individually Evaluated For Impairment [Member]
Total	309,000
Ending Balance	309,000
Agricultural | Loans Collectively Evaluated For Impairment [Member]
Allowance, Ending Balance	1,000
Total	362,000
Ending Balance	362,000
Commercial and industrial
Allowance, Beginning balance	704,000	681,000
Charge-offs		(158,000)
Recoveries		3,000
(Credit) Provision		178,000
Allowance, Ending Balance		704,000
Total		86,999,000
Ending Balance		86,999,000
Commercial and industrial | Loans Individually Evaluated For Impairment [Member]
Total		973,000
Ending Balance		973,000
Commercial and industrial | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance	704,000
Allowance, Ending Balance		704,000
Total		86,026,000
Ending Balance		86,026,000
Commercial and Industrial
Allowance, Beginning balance	504,000
Recoveries	2,000
(Credit) Provision	20,000
Allowance, Ending Balance	265,000	504,000
Total	66,909,000	56,077,000
Reserve For Unfunded Lending Commitments	25,000
Ending Balance	66,909,000	56,077,000
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	243,000
Allowance, Ending Balance		243,000
Commercial and Industrial | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	(261,000)
Allowance, Ending Balance		(261,000)
Commercial and Industrial | Loans Individually Evaluated For Impairment [Member]
Total	611,000
Ending Balance	611,000
Commercial and Industrial | Loans Collectively Evaluated For Impairment [Member]
Allowance, Ending Balance	265,000
Total	66,298,000
Ending Balance	66,298,000
commercial real estate
Allowance, Beginning balance	5,932,000	5,408,000
Charge-offs		(3,000)
Recoveries		40,000
(Credit) Provision		487,000
Allowance, Ending Balance		5,932,000
Total		611,549,000
Ending Balance		611,549,000
commercial real estate | Loans Individually Evaluated For Impairment [Member]
Total		9,495,000
Ending Balance		9,495,000
commercial real estate | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance	5,932,000
Allowance, Ending Balance		5,932,000
Total		602,054,000
Ending Balance		602,054,000
residential real estate
Allowance, Beginning balance	1,557,000	1,539,000
Charge-offs		(12,000)
Recoveries		16,000
(Credit) Provision		14,000
Allowance, Ending Balance		1,557,000
Total		154,506,000
Ending Balance		154,506,000
residential real estate | Loans Individually Evaluated For Impairment [Member]
Total		739,000
Ending Balance		739,000
residential real estate | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance	1,557,000
Allowance, Ending Balance		1,557,000
Total		153,767,000
Ending Balance		153,767,000
Consumer
Allowance, Beginning balance	84,000
Charge-offs	(57,000)
Recoveries	5,000
(Credit) Provision	35,000
Allowance, Ending Balance	78,000	84,000
Total	5,824,000	5,707,000
Ending Balance	5,824,000	5,707,000
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	95,000
Allowance, Ending Balance		95,000
Consumer | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	11,000
Allowance, Ending Balance		11,000
Consumer | Loans Collectively Evaluated For Impairment [Member]
Allowance, Ending Balance	78,000
Total	5,824,000
Ending Balance	5,824,000
Consumer
Allowance, Beginning balance	81,000	84,000
Charge-offs		(33,000)
Recoveries		5,000
(Credit) Provision		25,000
Allowance, Ending Balance		81,000
Total		5,415,000
Ending Balance		5,415,000
Consumer | Loans Collectively Evaluated For Impairment [Member]
Allowance, Beginning balance	81,000
Allowance, Ending Balance		81,000
Total		5,415,000
Ending Balance		5,415,000
State and Political Subdivisions
Allowance, Beginning balance	197,000
(Credit) Provision	(7,000)
Allowance, Ending Balance	42,000	197,000
Total	26,181,000	30,945,000
Reserve For Unfunded Lending Commitments	1,000
Ending Balance	26,181,000	30,945,000
State and Political Subdivisions | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance, Beginning balance	49,000
Allowance, Ending Balance		49,000
State and Political Subdivisions | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance, Beginning balance	(148,000)
Allowance, Ending Balance		(148,000)
State and Political Subdivisions | Loans Collectively Evaluated For Impairment [Member]
Allowance, Ending Balance	42,000
Total	26,181,000
Ending Balance	$ 26,181,000
Unallocated Financing Receivables
Allowance, Beginning balance		968,000
(Credit) Provision		$ (968,000)