LOANS AND ALLOWANCE FOR LOAN LOSSES, TDR Loan Modifications (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	$ 4,137	$ 7,213
Specific allocations in reserves to customers	0
Commitments to lend additional amounts to customers	3,878	1,100
Residential Real Estate [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring		202
Commercial Real Estate [Member] | Owner-occupied [Member] | Reduction of Principal and Interest Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	1,463	1,486
Commercial Real Estate [Member] | Owner-occupied [Member] | Maturity Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	289	351
Commercial Real Estate [Member] | Owner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	377	384
Commercial Real Estate [Member] | Nonowner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	386	390
Commercial and Industrial [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	1,622	4,400
Performing to Modified Terms [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	4,137	7,213
Performing to Modified Terms [Member] | Residential Real Estate [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring		202
Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Reduction of Principal and Interest Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	1,463	1,486
Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Maturity Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	289	351
Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	377	384
Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Nonowner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	386	390
Performing to Modified Terms [Member] | Commercial and Industrial [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	1,622	4,400
Not Performing to Modified Terms [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	0	0
Not Performing to Modified Terms [Member] | Residential Real Estate [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring		0
Not Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Reduction of Principal and Interest Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	0	0
Not Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Maturity Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	0	0
Not Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Owner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	0	0
Not Performing to Modified Terms [Member] | Commercial Real Estate [Member] | Nonowner-occupied [Member] | Credit Extension at Lower Stated Rate than Market Rate [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	0	0
Not Performing to Modified Terms [Member] | Commercial and Industrial [Member] | Interest Only Payments [Member]
Troubled Debt Restructuring Loan Modifications [Abstract]
Troubled Debt Restructuring	$ 0	$ 0