LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($) loan contract	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($) loan contract	Dec. 31, 2022 USD ($)
Loans Receivable Held-for-sale, Amount	$ 0		$ 0		$ 71,000
Loans transferred from held for sale portfolio			$ 0	$ 7,900,000
Maximum loan to value ratio with PMI	95.00%		95.00%
Loan Payments, Delinquency Period, Beyond Which Loans are Considered Past Due			10 days
Loan Payments, Delinquency Period, at which time Delinquency Notice is Automatically Generated			10 or 15 days
Loan Payments, Delinquency Period, Beyond Which Loans are Considered Non-Accrual			90 days
Accrued interest exclude from the amortized cost basis of loans	$ 2,239,000		$ 2,239,000
Reserve For Unfunded Lending Commitments	233,000		233,000
Transfer of Loans Held-for-sale to Portfolio Loans			0	7,900,000
Foreclosed Assets Held For Resale	0		0		0
Consumer Mortgage Loans Secured by Residential Real Estate in Process of Foreclosure	138,000		138,000		41,000
Financing Receivable, Modifications, Recorded Investment		$ 7,589,000		7,589,000	7,480,000
Financing Receivable, Modifications, Unfunded Commitments				0
Modified value of TDR		$ 143,000		$ 515,000
Number of contracts		1		2
Impaired Financing Receivable Related Allowance Attributable to TDR					0
Impaired Financing Receivable, Interest Income, Accrual Method	6,000	$ 75,000	18,000	$ 222,000
Impaired Financing Receivable Interest Income Non-accrual Method	0	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 143,000		$ 515,000
Unfunded Loan Commitment
Reserve For Unfunded Lending Commitments	233,000		233,000		$ 68,000
Payment Modification
Number of contracts | loan		1		2
Commercial and Industrial
Reserve For Unfunded Lending Commitments	25,000		25,000
Financing Receivable Modification Not In Compliance Of Terms				$ 670,000
Impaired Financing Receivable, Interest Income, Accrual Method		$ 4,000		$ 9,000
Commercial and Industrial | GGLs
Government Guaranteed Loans.	4,501,000		4,501,000
Commercial and industrial
Number of TDRs not in compliance with restructure | contract		3		3
Political Subdivision Loans
Tax free loans	$ 27,012,000		$ 27,012,000
Commercial Real Estate
Modified value of TDR		$ 143,000		$ 515,000
Number of contracts		1		2
Financing Receivable Modification Not In Compliance Of Terms				$ 107,000
Number of TDRs not in compliance with restructure | contract		4		4
Impaired Financing Receivable, Interest Income, Accrual Method		$ 71,000		$ 213,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 143,000		$ 515,000
Number of loans modified as troubled debt restructuring within previous 12 months, with subsequent payment default | loan				0
Commercial Real Estate | Maximum
Term of loan offering			20 years
Maximum loan to value ratio			80.00%
Commercial Real Estate | Payment Modification
Number of contracts | loan		1		2
Residential Real Estate | Maximum
Term of loan offering			20 years
Residential Real Estate | Home Equity Term Loans | Maximum
Term of loan offering			15 years
Residential Real Estate | Residential Mortgage | Originated For Resale
Loans held for sale term	30 years		30 years
Residential Real Estate | Residential Mortgage | Originated For Resale | Maximum
Term of loan offering			30 years
Maximum loan to value ratio			80.00%
Residential Real Estate | Home Equity Loan | Maximum
Maximum loan to value ratio			80.00%
Residential Real Estate | Home Equity Line of Credit | Maximum
Maximum loan to value ratio			80.00%
Residential Real Estate | Home Equity Line of Credit | Home Equity Term Loans | Maximum
Term of loan offering			20 years
Agricultural | Maximum
Term of loan offering			10 years
Maximum loan to value ratio			70.00%