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LOANS AND CREDIT QUALITY - Loan Modifications (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Consumer loans | Single family | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 1,377
% of Total Class of Financing Receivable	0.14%
Consumer loans | Single family | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 269
% of Total Class of Financing Receivable	0.03%
Consumer loans | Single family | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 814
% of Total Class of Financing Receivable	0.08%
Consumer loans | Single family | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 13,742
% of Total Class of Financing Receivable	1.36%
Consumer loans | Single family | Interest Rate Reduction, Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 6,500
% of Total Class of Financing Receivable	0.64%
Consumer loans | Home equity and other | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 69
% of Total Class of Financing Receivable	0.02%
Consumer loans | Home equity and other | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 51
% of Total Class of Financing Receivable	0.01%
Commercial business | Commercial business | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 1,562
% of Total Class of Financing Receivable	0.43%
Commercial business | Commercial business | Interest Rate Reduction and Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis at Period End	$ 459
% of Total Class of Financing Receivable	0.13%

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- Definition

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