ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) loan	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ (55)	$ 328
Unused commitments to extend credit	1,500
Loans payment default	$ 0
Troubled debt restructuring related reserves			$ 600
Usual sustained repayment performance period	6 months
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | loan	42		45
Total loans outstanding	$ 5,000		$ 6,700
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | loan	14		8
Total loans outstanding	$ 3,200		$ 1,600
Residential and Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 200	$ 300
Impairment loans, charge off period	90 days