LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details)	3 Months Ended			12 Months Ended
	Dec. 31, 2024 USD ($) item	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) item loan	Dec. 31, 2023 USD ($) item loan
Loans Receivable Held-for-sale, Amount	$ 737,000			$ 737,000	$ 214,000
Gross Charge Offs		$ 741,000		938,000	57,000
Unpaid principal balance	948,451,000			$ 948,451,000	911,078,000
Delinquency notice is automatically generated				10 or 15 days
Reserve for unfunded lending commitments	102,000			$ 102,000	166,000
Foreclosed Assets Held For Resale	0			0	$ 0
Consumer mortgage loans	0			0
Financing Receivable, Modifications, Recorded Investment	10,193,000			10,193,000
Loan carrying a post modification recorded investment, paid current	120,000		$ 9,455,000	120,000
Financing Receivable, Modifications, Unfunded Commitments				0
Modified value of TDR	$ 174,000	120,000	9,455,000	$ 10,183,000
Number of TDRs not in compliance with restructure | item	0			0
Number of financing receivable modified | loan					0
Recorded Investment				$ 10,193,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 174,000	$ 120,000	$ 9,455,000	$ 10,183,000
Number of loans modified as troubled debt restructuring within previous 12 months, with subsequent payment default				2	0
Interest on non-accrual loans, Estimate of accrual amount				$ 2,371,000	$ 2,488,000
GGLs
Unpaid principal balance	4,306,000			4,306,000	4,470,000
Unfunded Loan Commitment
Reserve for unfunded lending commitments	$ 102,000			102,000	166,000
Term Modification
Period of maturity date extension	6 months	10 months
Commercial and Industrial
Gross Charge Offs				524,000
Unpaid principal balance	$ 67,105,000			67,105,000	66,909,000
Reserve for unfunded lending commitments	17,000			17,000	25,000
Modified value of TDR				174,000
Recorded Investment				174,000
Financing Receivable, Modifications, Post-Modification Recorded Investment				174,000
Commercial and Industrial | GGLs
Government Guaranteed Loans.	4,306,000			4,306,000	4,470,000
State and Political Subdivisions
Unpaid principal balance	22,147,000			22,147,000	26,181,000
Reserve for unfunded lending commitments					1,000
Tax free loans	22,147,000			$ 22,147,000	26,181,000
Commercial Real Estate | Maximum
Term of loan offering				20 years
Maximum loan to value ratio				80.00%
Residential Real Estate
Loans Receivable Held-for-sale, Amount	$ 737,000			$ 737,000	214,000
Consumer mortgage loans					138,000
Residential Real Estate | Maximum
Maximum loan to value ratio				80.00%
Maximum loan to value ratio with PMI	95.00%			95.00%
Residential Real Estate | Residential Mortgage
Gross Charge Offs	$ 41,000
Residential Real Estate | Residential Mortgage | Maximum
Term of loan offering				30 years
Residential Real Estate | Residential Mortgage | Originated For Resale | Maximum
Term of loan offering				30 years
Residential Real Estate | Home Equity Loan | Maximum
Term of loan offering				15 years
Maximum loan to value ratio				80.00%
Residential Real Estate | Home Equity Line of Credit | Maximum
Term of loan offering				20 years
Maximum loan to value ratio				80.00%
Consumer
Gross Charge Offs				$ 69,000	57,000
Unpaid principal balance	6,459,000			6,459,000	5,824,000
Agricultural
Unpaid principal balance	939,000			$ 939,000	671,000
Agricultural | Maximum
Term of loan offering				10 years
Maximum loan to value ratio				70.00%
Real Estate
Loans Receivable Held-for-sale, Amount	737,000			$ 737,000	214,000
Gross Charge Offs	67,000			345,000
Unpaid principal balance	851,801,000			851,801,000	811,493,000
Reserve for unfunded lending commitments	85,000			85,000	$ 140,000
Modified value of TDR	434,000			10,009,000
Recorded Investment				10,019,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 434,000			$ 10,009,000