LOANS, ALLOWANCE FOR LOAN LOSSES AND IMPAIRED LOANS - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	$ 1,290,176	$ 1,310,963
Nonaccrual Loans	11,858	11,665
Total Past Due Accruing and Nonaccrual Loans	18,708	15,726
Total Loans	1,295,666	1,317,045	$ 1,201,262
C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Total Loans	2,071	8,755
Financial Asset, Past Due
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	6,850	4,061
30-59 Days Past Due
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	6,057	3,341
60-89 Days Past Due
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	395	560
Greater Than 89 Days
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	398	160
Financial Asset, Not Past Due
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,276,958	1,301,319
Commercial/Agricultural Real Estate
Aging analysis of the Bank's real estate and consumer loans
Total Loans	1,032,857	1,034,829	795,476
Commercial/Agricultural Real Estate | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	5,503	5,374
Total Past Due Accruing and Nonaccrual Loans	7,499	5,410
Total Loans	689,774	698,465
Commercial/Agricultural Real Estate | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	3,454	3,490
Total Past Due Accruing and Nonaccrual Loans	4,349	3,992
Total Loans	75,716	78,495
Commercial/Agricultural Real Estate | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	0	0
Total Past Due Accruing and Nonaccrual Loans	0	0
Total Loans	179,487	178,349
Commercial/Agricultural Real Estate | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	129	0
Total Past Due Accruing and Nonaccrual Loans	129	0
Total Loans	87,880	79,520
Commercial/Agricultural Real Estate | Financial Asset, Past Due | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,996	36
Commercial/Agricultural Real Estate | Financial Asset, Past Due | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	895	502
Commercial/Agricultural Real Estate | Financial Asset, Past Due | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Financial Asset, Past Due | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | 30-59 Days Past Due | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,996	36
Commercial/Agricultural Real Estate | 30-59 Days Past Due | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	895	498
Commercial/Agricultural Real Estate | 30-59 Days Past Due | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | 30-59 Days Past Due | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | 60-89 Days Past Due | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | 60-89 Days Past Due | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	4
Commercial/Agricultural Real Estate | 60-89 Days Past Due | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | 60-89 Days Past Due | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Greater Than 89 Days | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Greater Than 89 Days | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Greater Than 89 Days | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Greater Than 89 Days | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Commercial/Agricultural Real Estate | Financial Asset, Not Past Due | Commercial real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	682,275	693,055
Commercial/Agricultural Real Estate | Financial Asset, Not Past Due | Agricultural real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	71,367	74,503
Commercial/Agricultural Real Estate | Financial Asset, Not Past Due | Multi-family real estate
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	179,487	178,349
Commercial/Agricultural Real Estate | Financial Asset, Not Past Due | Construction and land development
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	87,751	79,520
C&I/Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Total Loans	151,850	162,510	243,114
C&I/Agricultural operating | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	284	298
Total Past Due Accruing and Nonaccrual Loans	284	330
Total Loans	121,022	122,167
C&I/Agricultural operating | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	0	0
Total Past Due Accruing and Nonaccrual Loans	0	0
Total Loans	2,071	8,755
C&I/Agricultural operating | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	1,064	993
Total Past Due Accruing and Nonaccrual Loans	2,709	2,116
Total Loans	28,757	31,588
C&I/Agricultural operating | Financial Asset, Past Due | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	32
C&I/Agricultural operating | Financial Asset, Past Due | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | Financial Asset, Past Due | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,645	1,123
C&I/Agricultural operating | 30-59 Days Past Due | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | 30-59 Days Past Due | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | 30-59 Days Past Due | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,645	1,123
C&I/Agricultural operating | 60-89 Days Past Due | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	32
C&I/Agricultural operating | 60-89 Days Past Due | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | 60-89 Days Past Due | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | Greater Than 89 Days | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | Greater Than 89 Days | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | Greater Than 89 Days | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
C&I/Agricultural operating | Financial Asset, Not Past Due | Commercial and industrial
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	120,738	121,837
C&I/Agricultural operating | Financial Asset, Not Past Due | C&I SBA PPP loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	2,071	8,755
C&I/Agricultural operating | Financial Asset, Not Past Due | Agricultural operating
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	26,048	29,472
Residential Mortgage
Aging analysis of the Bank's real estate and consumer loans
Total Loans	88,260	94,861	127,622
Residential Mortgage | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	1,334	1,268
Total Past Due Accruing and Nonaccrual Loans	3,568	3,382
Total Loans	84,773	90,990
Residential Mortgage | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	0	165
Total Past Due Accruing and Nonaccrual Loans	0	282
Total Loans	3,487	3,871
Residential Mortgage | Financial Asset, Past Due | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	2,234	2,114
Residential Mortgage | Financial Asset, Past Due | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	117
Residential Mortgage | 30-59 Days Past Due | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	1,444	1,471
Residential Mortgage | 30-59 Days Past Due | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	117
Residential Mortgage | 60-89 Days Past Due | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	392	487
Residential Mortgage | 60-89 Days Past Due | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Residential Mortgage | Greater Than 89 Days | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	398	156
Residential Mortgage | Greater Than 89 Days | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Residential Mortgage | Financial Asset, Not Past Due | Residential mortgage
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	81,205	87,608
Residential Mortgage | Financial Asset, Not Past Due | Purchased HELOC loans
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	3,487	3,589
Consumer Installment
Aging analysis of the Bank's real estate and consumer loans
Total Loans	22,699	24,845	$ 35,050
Consumer Installment | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	60	55
Total Past Due Accruing and Nonaccrual Loans	99	120
Total Loans	14,508	15,971
Consumer Installment | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Nonaccrual Loans	30	22
Total Past Due Accruing and Nonaccrual Loans	71	94
Total Loans	8,191	8,874
Consumer Installment | Financial Asset, Past Due | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	39	65
Consumer Installment | Financial Asset, Past Due | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	41	72
Consumer Installment | 30-59 Days Past Due | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	39	38
Consumer Installment | 30-59 Days Past Due | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	38	58
Consumer Installment | 60-89 Days Past Due | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	27
Consumer Installment | 60-89 Days Past Due | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	3	10
Consumer Installment | Greater Than 89 Days | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	0
Consumer Installment | Greater Than 89 Days | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	0	4
Consumer Installment | Financial Asset, Not Past Due | Originated indirect paper
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	14,409	15,851
Consumer Installment | Financial Asset, Not Past Due | Other consumer
Aging analysis of the Bank's real estate and consumer loans
Outstanding balance	$ 8,120	$ 8,780