LOANS (Investment in Loans on Non-Accrual Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	$ 61,698	$ 63,399
Non-accrual with no Allowance for Credit Loss	16,280	16,000
Total	77,978	79,399
Non-PCD
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	60,764	60,089
Non-accrual with no Allowance for Credit Loss	14,334	12,636
Total	75,098	72,725
Non-PCD \| Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	27,782	27,337
Non-accrual with no Allowance for Credit Loss	11,131	8,759
Total	38,913	36,096
Non-PCD \| Mortgage loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	8,770	10,339
Non-accrual with no Allowance for Credit Loss	3,153	3,858
Total	11,923	14,197
Non-PCD \| Consumer
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	4,163	3,362
Non-accrual with no Allowance for Credit Loss	44	14
Total	4,207	3,376
Non-PCD \| Consumer \| Personal loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	3,468	2,741
Non-accrual with no Allowance for Credit Loss	44	14
Total	3,512	2,755
Non-PCD \| Consumer \| Credit lines
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	125	35
Non-accrual with no Allowance for Credit Loss	0	0
Total	125	35
Non-PCD \| Consumer \| Credit cards
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	570	586
Non-accrual with no Allowance for Credit Loss	0	0
Total	570	586
Non-PCD \| Auto loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	20,049	19,051
Non-accrual with no Allowance for Credit Loss	6	5
Total	20,055	19,056
PCD
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	934	3,310
Non-accrual with no Allowance for Credit Loss	1,946	3,364
Total	2,880	6,674
PCD \| Mortgage loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	239	250
Non-accrual with no Allowance for Credit Loss	0	0
Total	239	250
Puerto Rico \| Non-PCD \| Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	6,465	8,113
Non-accrual with no Allowance for Credit Loss	8,244	8,759
Total	14,709	16,872
Puerto Rico \| Non-PCD \| Commercial loans \| Commercial secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	4,610	3,553
Non-accrual with no Allowance for Credit Loss	6,248	7,929
Total	10,858	11,482
Puerto Rico \| Non-PCD \| Commercial loans \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	1,855	4,560
Non-accrual with no Allowance for Credit Loss	1,996	830
Total	3,851	5,390
Puerto Rico \| PCD \| Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	695	3,060
Non-accrual with no Allowance for Credit Loss	1,946	3,364
Total	2,641	6,424
Puerto Rico \| PCD \| Commercial loans \| Commercial secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	0	3,060
Non-accrual with no Allowance for Credit Loss	1,946	2,417
Total	1,946	5,477
Puerto Rico \| PCD \| Commercial loans \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	695	0
Non-accrual with no Allowance for Credit Loss	0	947
Total	695	947
UNITED STATES \| Non-PCD \| Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual with Allowance for Credit Loss	21,317	19,224
Non-accrual with no Allowance for Credit Loss	2,887	0
Total	$ 24,204	$ 19,224

Financing Receivable, Excluding Accrued Interest Receivable, Nonaccrual, With Allowance

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

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