ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) security_loan	Dec. 31, 2022 USD ($) security_loan	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 852	$ 702	$ 663
Troubled debt restructuring related reserves		$ 600
Various Modifications
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	$ 18,400
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | security_loan	31	45
Total loans outstanding, residential loans	$ 3,200	$ 6,700
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | security_loan	9	8
Total loans outstanding, residential loans	$ 1,100	$ 1,600
Residential and Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 600	$ 400	$ 1,500
Impairment loans, charge off period	90 days