LOANS AND ALLOWANCE FOR LOAN LOSSES - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) numberOfBank Category property	Dec. 31, 2020 USD ($) property loan numberOfBank
Activity in the allowance for loan losses:
Number of additional collateralized loans in the process of foreclosure | numberOfBank	6	5
Investment in loans in the process of foreclosure	$ 400,000	$ 200,000
Foreclosed properties held	$ 2,400,000
Number foreclosed properties held | property		32
Number of points in internal risk rating system | Category	9
Number of categories in internal risk rating system considered as not criticized | Category	6
Commercial relationship credit review threshold amount	$ 1,000,000
Past due period before loans placed in non-accrual status	90 days
Recent loan payment history before removal from non-accrual status	6 months
Residential
Activity in the allowance for loan losses:
Foreclosed properties held	$ 200,000	$ 2,600,000
Number foreclosed properties held | property	4
Increase (decrease) in impaired loans (percentage)	7.30%	56.60%
Consumer
Activity in the allowance for loan losses:
Number of additional collateralized loans in the process of foreclosure | loan		11
Investment in loans in the process of foreclosure		$ 1,100,000
Related allowance		$ 0
Commercial
Activity in the allowance for loan losses:
Foreclosed properties held	$ 2,200,000
Number foreclosed properties held | property	10
Increase (decrease) in impaired loans (percentage)	92.70%