LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Recorded investment in non-accrual loans by class (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Mar. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 4,262	$ 4,226
Number of loans classified as TDRs | loan	3
Recorded investments	$ 4,300	4,200
Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	8	6
1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	75	72
Owner Occupied CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,241	1,222
Commercial. and Industrial.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 2,938	$ 2,926