LOANS (Troubled-Amortized Cost Basis Debt Restructuring Loan Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 27	$ 0
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	102	3,099
Principal Forbearance/Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	0	129
Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	0	215
Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	0	0
Commercial loans \| Interest Rate Reduction \| Puerto Rico
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0
% of Total Class of Financing Receivable		0.00%
Commercial loans \| Term Extension \| Puerto Rico
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 495
% of Total Class of Financing Receivable		0.04%
Commercial loans \| Principal Forbearance/Forgiveness \| Puerto Rico
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0
% of Total Class of Financing Receivable		0.00%
Commercial loans \| Combination of Term Extension and Interest Rate Reduction \| Puerto Rico
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0
% of Total Class of Financing Receivable		0.00%
Commercial loans \| Combination of Term Extension and Principal Forgiveness/Forbearance \| Puerto Rico
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0
% of Total Class of Financing Receivable		0.00%
Mortgage loans \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Mortgage loans \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 95	$ 2,604
% of Total Class of Financing Receivable	0.01%	0.16%
Mortgage loans \| Principal Forbearance/Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 129
% of Total Class of Financing Receivable	0.00%	0.01%
Mortgage loans \| Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 187
% of Total Class of Financing Receivable	0.00%	0.01%
Mortgage loans \| Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Consumer \| Personal loans \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 27	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Consumer \| Personal loans \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 7	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Consumer \| Personal loans \| Principal Forbearance/Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Consumer \| Personal loans \| Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 28
% of Total Class of Financing Receivable	0.00%	0.01%
Consumer \| Personal loans \| Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

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- Definition

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+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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-Section 55
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-URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-34

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