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LOANS (Troubled-Amortized Cost Basis Debt Restructuring Loan Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 9,824	$ 272	$ 9,881
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	894	415	2,954	1,091
Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	1,436	0	1,986	89
Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	0	123	3,356	123
Combination of Interest Rate Reduction, Term Extension and Principal Forgiveness / Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	0	0	7,262	0
Commercial loans | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 9,824	$ 272	$ 9,824
Percentage of total class of financing receivable.	0.00%	1.44%	0.01%	1.44%
Commercial loans | Puerto Rico | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 272	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%
Commercial loans | Puerto Rico | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 1,177	$ 0	$ 1,631	$ 0
Percentage of total class of financing receivable.	0.05%	0.00%	0.06%	0.00%
Commercial loans | Commercial secured by real estate: | Puerto Rico | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 194	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%
Commercial loans | Commercial secured by real estate: | Puerto Rico | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 454	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.03%	0.00%
Commercial loans | Other commercial and industrial | Puerto Rico | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 78	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%
Commercial loans | Other commercial and industrial | Puerto Rico | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 697	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.06%	0.00%
Commercial loans | Other commercial and industrial | Puerto Rico | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 1,177	$ 0	$ 1,177	$ 0
Percentage of total class of financing receivable.	0.10%	0.00%	0.10%	0.00%
Commercial loans | Commercial US | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.		$ 9,824		$ 9,824
Percentage of total class of financing receivable.		1.44%		1.44%
Commercial loans | Commercial US | Principal Forbearance / Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.		$ 0		$ 0
Percentage of total class of financing receivable.		0.00%		0.00%
Commercial loans | Commercial US | Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0		$ 0
Percentage of total class of financing receivable.	0.00%	0.00%		0.00%
Commercial loans | Commercial US | UNITED STATES | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0		$ 0
Percentage of total class of financing receivable.	0.00%		0.00%
Commercial loans | Commercial US | UNITED STATES | Principal Forbearance / Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0		$ 9,821
Percentage of total class of financing receivable.	0.00%		1.18%
Commercial loans | Commercial US | UNITED STATES | Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.			$ 3,258
Percentage of total class of financing receivable.			0.39%
Commercial loans | Commercial US | UNITED STATES | Combination of Interest Rate Reduction, Term Extension and Principal Forgiveness / Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 7,125	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.86%	0.00%
Mortgage loans | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 0	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.00%	0.00%
Mortgage loans | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 842	$ 415	$ 2,113	$ 1,084
Percentage of total class of financing receivable.	0.06%	0.03%	0.15%	0.07%
Mortgage loans | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 84	$ 0	$ 127	$ 89
Percentage of total class of financing receivable.	0.01%	0.00%	0.01%	0.01%
Mortgage loans | Combination of Term Extension and Principal Forgiveness/Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 123	$ 98	$ 123
Percentage of total class of financing receivable.	0.00%	0.01%	0.00%	0.01%
Mortgage loans | Combination of Interest Rate Reduction, Term Extension and Principal Forgiveness / Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 137	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%
Mortgage loans | Interest Rate Reduction and Principal Forgiveness and Principal Forbearance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 94	$ 0	$ 94	$ 0
Percentage of total class of financing receivable.	0.01%	0.00%	0.01%	0.00%
Personal loans | Personal loans | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 0	$ 26
Percentage of total class of financing receivable.	0.00%	0.00%	0.00%	0.00%
Personal loans | Personal loans | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 0	$ 7
Percentage of total class of financing receivable.	0.00%	0.00%	0.00%	0.00%
Personal loans | Personal loans | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 95	$ 0	$ 95	$ 0
Percentage of total class of financing receivable.	0.01%	0.00%	0.01%	0.00%
Auto loans | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 0	$ 0	$ 0	$ 31
Percentage of total class of financing receivable.	0.00%	0.00%	0.00%	0.00%
Auto loans | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 52	$ 0	$ 144	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%
Auto loans | Combination of Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis.	$ 80	$ 0	$ 133	$ 0
Percentage of total class of financing receivable.	0.00%	0.00%	0.01%	0.00%

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