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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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LOANS (Composition of Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 8,235,063	$ 8,201,042
Allowance for credit losses	(203,956)	(202,341)	$ (181,174)
Total loans-held-for investment, net	8,031,107	7,998,701
Total loans held-for-sale	8,967	15,545
Total loans	8,040,074	8,014,246
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,553,096	3,490,169
Allowance for credit losses	(68,903)		(47,790)
Total loans held-for-sale	0	3,062
Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,681,456	2,660,194
Commercial loans \| US – Federal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	871,640	829,975
Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,373,629	1,390,346
Allowance for credit losses	(9,581)		(9,990)
Total loans held-for-sale	8,967	12,483
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	677,841	683,548
Allowance for credit losses	(33,008)		(32,247)
Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,630,497	2,636,979
Allowance for credit losses	(92,464)		(91,147)
Non-PCD
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	7,433,763	7,375,471
Allowance for credit losses	(200,111)	(198,239)	(174,752)	$ (170,709)
Total loans-held-for investment, net	7,233,652	7,177,232
Total loans held-for-sale	8,967	15,545
Total loans	7,242,619	7,192,777
Non-PCD \| Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,482,806	3,416,280
Allowance for credit losses	(68,408)	(65,943)	(45,452)	(44,814)
Total loans held-for-sale	0	3,062
Non-PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,611,166	2,586,305
Non-PCD \| Commercial loans \| US – Federal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	871,640	829,975
Non-PCD \| Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	643,000	639,055
Allowance for credit losses	(6,243)	(6,358)	(5,922)	(6,395)
Total loans held-for-sale	8,967	12,483
Non-PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	677,535	683,246
Allowance for credit losses	(32,998)	(33,466)	(32,236)	(31,818)
Non-PCD \| Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,630,422	2,636,890
Allowance for credit losses	(92,462)	(92,472)	(91,142)	(87,682)
PCD
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	801,300	825,571
Allowance for credit losses	(3,845)	(4,102)	(6,422)	(5,154)
Total loans-held-for investment, net	797,455	821,469
Total loans held-for-sale	0	0
Total loans	797,455	821,469
PCD \| Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	70,290	73,889
Allowance for credit losses	(495)	(493)	(2,338)	(622)
Total loans held-for-sale	0	0
PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	70,290	73,889
PCD \| Commercial loans \| US – Federal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
PCD \| Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	730,629	751,291
Allowance for credit losses	(3,338)	(3,599)	(4,068)	(4,514)
Total loans held-for-sale	0	0
PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	306	302
Allowance for credit losses	(10)	(9)	(11)	(11)
PCD \| Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	75	89
Allowance for credit losses	(2)	(1)	$ (5)	$ (7)
Commercial secured by real estate \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,318,788	1,306,300
Commercial secured by real estate \| Non-PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,257,561	1,241,646
Commercial secured by real estate \| PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	61,227	64,654
Other commercial and industrial \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,362,668	1,353,894
Other commercial and industrial \| Non-PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,353,605	1,344,659
Other commercial and industrial \| PCD \| Commercial loans \| Domestic - Puerto Rico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,063	9,235
Personal loans \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	635,766	638,985
Personal loans \| Non-PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	635,766	638,985
Personal loans \| PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Credit lines \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,931	9,629
Credit lines \| Non-PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,625	9,327
Credit lines \| PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	306	302
Credit cards \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	32,777	34,300
Credit cards \| Non-PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	32,777	34,300
Credit cards \| PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Overdraft \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	367	634
Overdraft \| Non-PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	367	634
Overdraft \| PCD \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 0	$ 0