LOANS AND ALLOWANCE FOR LOAN LOSSES - Troubled Debt Restructuring (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Receivables [Abstract]
Performing TDRs	$ 5,900,000	$ 6,000,000
Nonperforming TDRs	$ 0	$ 0
Number of loans modified as TDRs | loan	0	0
Current payment term	6 months
Debt coverage ratio	1.25
Number of projected future quarters under review	1 year
Allowances for performing TDRs	$ 181,000	$ 254,000