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LOANS AND CREDIT QUALITY - Loan Modifications with Subsequent Default, by Loan Modification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Commercial business | Commercial business | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	$ 0		$ 0
Commercial business | Commercial business | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	2,990		2,990
Commercial business | Commercial business | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0		0
Commercial business | Commercial business | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0		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		0
Consumer loans | Single family | Significant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	235	$ 0	235	$ 0
Consumer loans | Single family | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	0	0	0
Consumer loans | Single family | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	0	0	0	0
Consumer loans | Single family | Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	634	0	2,879	172
Consumer loans | Single family | Interest Rate Reduction, Significant Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications with subsequent default	$ 70	$ 553	$ 1,162	$ 1,555

X

- Definition

Amortized cost excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 44
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-Publisher FASB
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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