LOANS AND CREDIT QUALITY - Loan Modifications with Subsequent Default, by Loan Modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	$ 0
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	976
Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0
Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	1,354
Interest Rate Reduction, Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0
Commercial business | Commercial business | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0
Consumer loan | Single family | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	$ 340
Consumer loan | Single family | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	0
Consumer loan | Single family | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	0
Consumer loan | Single family | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	1,354	1,198
Consumer loan | Single family | Interest Rate Reduction, Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	$ 764
Commercial business | Commercial business | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	976
Commercial business | Commercial business | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0
Commercial business | Commercial business | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0
Commercial business | Commercial business | Interest Rate Reduction, Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	$ 0