ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) loan	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 1,684	$ (189)	$ 1,477	$ 292
Various Modifications
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused commitments to extend credit	26,000		26,000		$ 18,400
Loans Modified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified with subsequent default	34,390	12,033	$ 49,555	12,033
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | loan			36		31
Total loans outstanding			$ 6,000		$ 3,200
Residential | Loans Modified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans modified with subsequent default	121		$ 121
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | loan			19		9
Total loans outstanding			$ 8,900		$ 1,100
Residential and Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 800	$ (300)	$ 700	$ 100
Impairment loans, charge off period			90 days