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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans By Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 1,447,529		$ 1,416,135	$ 1,380,399
Unearned net deferred fees and costs and loans in process			(2,585)
Unamortized discount on acquired loans			(1,766)
Allowance for loan losses	(22,973)	$ (23,164)	(17,939)	(17,217)
Loans receivable, net	1,424,556		1,393,845
1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			1,386,646
6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			12,170
7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			17,319
8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			1,125,279	1,098,917
Allowance for loan losses	(18,855)	(18,933)	(14,085)	(13,782)
Commercial/Agricultural Real Estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	748,118		725,971
Commercial/Agricultural Real Estate | Commercial real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			712,658
Commercial/Agricultural Real Estate | Commercial real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			5,771
Commercial/Agricultural Real Estate | Commercial real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			7,542
Commercial/Agricultural Real Estate | Commercial real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Commercial real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Agricultural real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	84,328		87,908
Commercial/Agricultural Real Estate | Agricultural real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			84,215
Commercial/Agricultural Real Estate | Agricultural real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			549
Commercial/Agricultural Real Estate | Agricultural real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			3,144
Commercial/Agricultural Real Estate | Agricultural real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Agricultural real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Multi-family real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	219,095		208,908
Commercial/Agricultural Real Estate | Multi-family real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			208,908
Commercial/Agricultural Real Estate | Multi-family real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Multi-family real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Multi-family real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Multi-family real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	109,041		102,492
Commercial/Agricultural Real Estate | Construction and land development | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			102,385
Commercial/Agricultural Real Estate | Construction and land development | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Construction and land development | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			107
Commercial/Agricultural Real Estate | Construction and land development | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Commercial/Agricultural Real Estate | Construction and land development | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
C&I/Agricultural operating
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			164,819	160,848
Allowance for loan losses	(1,189)	(1,458)	(2,318)	(1,974)
C&I/Agricultural operating | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	120,532		136,013
C&I/Agricultural operating | Commercial and industrial | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			129,748
C&I/Agricultural operating | Commercial and industrial | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			5,526
C&I/Agricultural operating | Commercial and industrial | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			739
C&I/Agricultural operating | Commercial and industrial | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
C&I/Agricultural operating | Commercial and industrial | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
C&I/Agricultural operating | Agricultural operating
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	24,571		28,806
C&I/Agricultural operating | Agricultural operating | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			26,418
C&I/Agricultural operating | Agricultural operating | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			324
C&I/Agricultural operating | Agricultural operating | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			2,064
C&I/Agricultural operating | Agricultural operating | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
C&I/Agricultural operating | Agricultural operating | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			108,651	102,090
Allowance for loan losses	(2,633)	(2,452)	(599)	(512)
Residential Mortgage | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	125,348		105,389
Residential Mortgage | Residential mortgage | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			101,730
Residential Mortgage | Residential mortgage | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Residential mortgage | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			3,659
Residential Mortgage | Residential mortgage | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Residential mortgage | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Purchased HELOC loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	2,881		3,262
Residential Mortgage | Purchased HELOC loans | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			3,262
Residential Mortgage | Purchased HELOC loans | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Purchased HELOC loans | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Purchased HELOC loans | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Residential Mortgage | Purchased HELOC loans | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			17,386	18,544
Allowance for loan losses	(296)	$ (321)	(129)	$ (132)
Consumer Installment | Originated indirect paper
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	7,175		10,236
Consumer Installment | Originated indirect paper | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			10,190
Consumer Installment | Originated indirect paper | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment | Originated indirect paper | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			46
Consumer Installment | Originated indirect paper | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment | Originated indirect paper | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 6,440		7,150
Consumer Installment | Other consumer | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			7,132
Consumer Installment | Other consumer | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment | Other consumer | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			18
Consumer Installment | Other consumer | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			0
Consumer Installment | Other consumer | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans			$ 0

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