LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Recorded investment in non-accrual loans by class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 4,358	$ 4,058
Recorded investments	2,200	3,600
Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	41	50
1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	83
Owner Occupied CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,250	479
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 2,984	$ 3,529