LOANS AND ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	$ 881,038,000		$ 881,038,000	$ 845,675,000	$ 858,469,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2023	302,000		302,000
2022	314,000		314,000
2021	201,000		201,000
2020	141,000		141,000
2019	200,000		200,000
Prior	2,000		2,000
Loans and Leases Receivable, Deferred Income, Total	1,160,000		1,160,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2023	78,636,000		78,636,000
2022	208,474,000		208,474,000
2021	159,031,000		159,031,000
2020	125,876,000		125,876,000
2019	71,816,000		71,816,000
Prior	237,205,000		237,205,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs	5,000	$ 171,000	43,000	186,000	206,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2022			23,000
2021			8,000
2019			4,000
Prior			8,000
Total Gross Charge Offs	5,000	171,000	43,000	186,000	206,000
GGLs
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	4,501,000		4,501,000		4,631,000
Pass
Financing Receivable, Recorded Investment [Line Items]
2023	78,285,000		78,285,000
2022	208,074,000		208,074,000
2021	158,181,000		158,181,000
2020	125,735,000		125,735,000
2019	62,351,000		62,351,000
Prior	226,635,000		226,635,000
Financing Receivable, Recorded Investment, Past Due, Total	859,261,000		859,261,000
Special Mention
Financing Receivable, Recorded Investment [Line Items]
2023	49,000		49,000
Prior	630,000		630,000
Financing Receivable, Recorded Investment, Past Due, Total	679,000		679,000
Substandard
Financing Receivable, Recorded Investment [Line Items]
2022	86,000		86,000
2021	649,000		649,000
2019	9,265,000		9,265,000
Prior	9,938,000		9,938,000
Financing Receivable, Recorded Investment, Past Due, Total	19,938,000		19,938,000
Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	784,126,000		784,126,000		764,880,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2023	186,000		186,000
2022	197,000		197,000
2021	160,000		160,000
2020	120,000		120,000
2019	(14,000)		(14,000)
Prior	3,000		3,000
Loans and Leases Receivable, Deferred Income, Total	652,000		652,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2023	66,531,000		66,531,000
2022	192,284,000		192,284,000
2021	137,054,000		137,054,000
2020	115,742,000		115,742,000
2019	64,689,000		64,689,000
Prior	207,826,000		207,826,000
Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
2023	66,345,000		66,345,000
2022	192,001,000		192,001,000
2021	136,245,000		136,245,000
2020	115,622,000		115,622,000
2019	55,438,000		55,438,000
Prior	197,923,000		197,923,000
Financing Receivable, Recorded Investment, Past Due, Total	763,574,000		763,574,000
Real Estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Prior	630,000		630,000
Financing Receivable, Recorded Investment, Past Due, Total	630,000		630,000
Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
2022	86,000		86,000
2021	649,000		649,000
2019	9,265,000		9,265,000
Prior	9,270,000		9,270,000
Financing Receivable, Recorded Investment, Past Due, Total	19,270,000		19,270,000
Agricultural
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	708,000		708,000		860,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2022	1,000		1,000
Loans and Leases Receivable, Deferred Income, Total	1,000		1,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2022	65,000		65,000
Prior	643,000		643,000
Agricultural | Pass
Financing Receivable, Recorded Investment [Line Items]
2022	64,000		64,000
Prior	643,000		643,000
Financing Receivable, Recorded Investment, Past Due, Total	707,000		707,000
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	62,866,000		62,866,000		56,077,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2023	83,000		83,000
2022	91,000		91,000
2021	27,000		27,000
2020	17,000		17,000
2019	212,000		212,000
Loans and Leases Receivable, Deferred Income, Total	430,000		430,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2023	9,238,000		9,238,000
2022	10,574,000		10,574,000
2021	6,035,000		6,035,000
2020	7,940,000		7,940,000
2019	6,932,000		6,932,000
Prior	22,147,000		22,147,000
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
2023	9,155,000		9,155,000
2022	10,483,000		10,483,000
2021	6,008,000		6,008,000
2020	7,923,000		7,923,000
2019	6,720,000		6,720,000
Prior	21,479,000		21,479,000
Financing Receivable, Recorded Investment, Past Due, Total	61,768,000		61,768,000
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Prior	668,000		668,000
Financing Receivable, Recorded Investment, Past Due, Total	668,000		668,000
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total				85,855,000	86,999,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs		149,000		158,000	158,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total Gross Charge Offs		149,000		158,000	158,000
Consumer
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	6,218,000		6,218,000		5,707,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2023	31,000		31,000
2022	23,000		23,000
2021	10,000		10,000
2020	3,000		3,000
2019	2,000		2,000
Loans and Leases Receivable, Deferred Income, Total	69,000		69,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2023	2,131,000		2,131,000
2022	1,454,000		1,454,000
2021	1,188,000		1,188,000
2020	263,000		263,000
2019	195,000		195,000
Prior	987,000		987,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs	5,000		43,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2022			23,000
2021			8,000
2019			4,000
Prior			8,000
Total Gross Charge Offs	5,000		43,000
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
2023	2,051,000		2,051,000
2022	1,431,000		1,431,000
2021	1,178,000		1,178,000
2020	260,000		260,000
2019	193,000		193,000
Prior	987,000		987,000
Financing Receivable, Recorded Investment, Past Due, Total	6,100,000		6,100,000
Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
2023	49,000		49,000
Financing Receivable, Recorded Investment, Past Due, Total	49,000		49,000
Consumer
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total				5,428,000	5,415,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs		10,000		16,000	33,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total Gross Charge Offs		10,000		16,000	33,000
State and Political Subdivisions
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	27,120,000		27,120,000		30,945,000
Financing Receivable, Deferred Income, by Origination Year [Abstract]
2023	2,000		2,000
2022	2,000		2,000
2021	4,000		4,000
2020	1,000		1,000
Prior	(1,000)		(1,000)
Loans and Leases Receivable, Deferred Income, Total	8,000		8,000
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [Abstract]
2023	736,000		736,000
2022	4,097,000		4,097,000
2021	14,754,000		14,754,000
2020	1,931,000		1,931,000
Prior	5,602,000		5,602,000
State and Political Subdivisions | Pass
Financing Receivable, Recorded Investment [Line Items]
2023	734,000		734,000
2022	4,095,000		4,095,000
2021	14,750,000		14,750,000
2020	1,930,000		1,930,000
Prior	5,603,000		5,603,000
Financing Receivable, Recorded Investment, Past Due, Total	$ 27,112,000		$ 27,112,000
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total				600,068,000	611,549,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs					3,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total Gross Charge Offs					3,000
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total				154,324,000	154,506,000
Financing Receivable, Gross Charge Offs, by Origination Year [Abstract]
Total Gross Charge Offs		12,000		12,000	12,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total Gross Charge Offs		$ 12,000		$ 12,000	$ 12,000