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LOANS, ALLOWANCE FOR LOAN LOSSES AND IMPAIRED LOANS - Loans By Risk (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 1,420,955	$ 1,416,135	$ 1,295,666
Unearned net deferred fees and costs and loans in process		(2,585)
Unamortized discount on acquired loans		(1,766)
Allowance for loan losses	(22,679)	(17,939)	(16,818)
Loans receivable, net	1,398,276	1,393,845
1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		1,386,646
6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		12,170
7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		17,319
8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		1,125,279	1,032,857
Allowance for loan losses			(13,183)
Commercial/Agricultural Real Estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	724,685	725,971
Commercial/Agricultural Real Estate | Commercial real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		712,658
Commercial/Agricultural Real Estate | Commercial real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		5,771
Commercial/Agricultural Real Estate | Commercial real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		7,542
Commercial/Agricultural Real Estate | Commercial real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Commercial real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Agricultural real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	90,706	87,908
Commercial/Agricultural Real Estate | Agricultural real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		84,215
Commercial/Agricultural Real Estate | Agricultural real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		549
Commercial/Agricultural Real Estate | Agricultural real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		3,144
Commercial/Agricultural Real Estate | Agricultural real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Agricultural real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Multi-family real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	207,686	208,908
Commercial/Agricultural Real Estate | Multi-family real estate | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		208,908
Commercial/Agricultural Real Estate | Multi-family real estate | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Multi-family real estate | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Multi-family real estate | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Multi-family real estate | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	114,288	102,492
Commercial/Agricultural Real Estate | Construction and land development | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		102,385
Commercial/Agricultural Real Estate | Construction and land development | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Construction and land development | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		107
Commercial/Agricultural Real Estate | Construction and land development | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Commercial/Agricultural Real Estate | Construction and land development | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
C&I/Agricultural operating
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		164,819	151,850
Allowance for loan losses			(2,162)
C&I/Agricultural operating | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	130,417	136,013
C&I/Agricultural operating | Commercial and industrial | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		129,748
C&I/Agricultural operating | Commercial and industrial | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		5,526
C&I/Agricultural operating | Commercial and industrial | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		739
C&I/Agricultural operating | Commercial and industrial | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
C&I/Agricultural operating | Commercial and industrial | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
C&I/Agricultural operating | Agricultural operating
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	24,168	28,806
C&I/Agricultural operating | Agricultural operating | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		26,418
C&I/Agricultural operating | Agricultural operating | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		324
C&I/Agricultural operating | Agricultural operating | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		2,064
C&I/Agricultural operating | Agricultural operating | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
C&I/Agricultural operating | Agricultural operating | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		108,651	88,260
Allowance for loan losses			(522)
Residential Mortgage | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	109,759	105,389
Residential Mortgage | Residential mortgage | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		101,730
Residential Mortgage | Residential mortgage | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Residential mortgage | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		3,659
Residential Mortgage | Residential mortgage | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Residential mortgage | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Purchased HELOC loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	3,206	3,262
Residential Mortgage | Purchased HELOC loans | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		3,262
Residential Mortgage | Purchased HELOC loans | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Purchased HELOC loans | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Purchased HELOC loans | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Residential Mortgage | Purchased HELOC loans | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		17,386	22,699
Allowance for loan losses			$ (169)
Consumer Installment | Originated indirect paper
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	9,313	10,236
Consumer Installment | Originated indirect paper | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		10,190
Consumer Installment | Originated indirect paper | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment | Originated indirect paper | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		46
Consumer Installment | Originated indirect paper | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment | Originated indirect paper | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 6,727	7,150
Consumer Installment | Other consumer | 1 to 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		7,132
Consumer Installment | Other consumer | 6
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment | Other consumer | 7
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		18
Consumer Installment | Other consumer | 8
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		0
Consumer Installment | Other consumer | 9
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance		$ 0

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