Loans - Loans held-in-portfolio in past due status, non-performing status and accruing loans past-due 90 days or more by loan class (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	$ 36,194,967	$ 35,064,971
Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	457,537	531,633
Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	235,606	190,356
Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	595,369	626,082
Non-accrual loans	361,398	357,611
Accruing loans past-due 90 days or more	233,971	268,471
Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,288,512	1,348,071
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	34,906,455	33,716,900
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,113,307	959,280
Construction | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Construction | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	34,349	0
Construction | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	6,378
Non-accrual loans	0	6,378
Accruing loans past-due 90 days or more	0	0
Construction | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	34,349	6,378
Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,078,958	952,902
Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,993,348	7,695,917
Mortgages | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	247,119	309,715
Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	126,232	122,103
Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	388,420	427,719
Non-accrual loans	186,354	186,297
Accruing loans past-due 90 days or more	202,066	241,422
Mortgages | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	761,771	859,537
Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,231,577	6,836,380
Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,405,302	2,415,620
Commercial | Commercial multi-family | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,926	9,665
Commercial | Commercial multi-family | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	2,001
Commercial | Commercial multi-family | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	8,787	1,991
Non-accrual loans	8,787	1,991
Accruing loans past-due 90 days or more	0	0
Commercial | Commercial multi-family | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,713	13,657
Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,393,589	2,401,963
Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,185,381	5,087,421
Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,500	6,076
Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,187	1,113
Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	9,775	9,862
Non-accrual loans	9,775	9,862
Accruing loans past-due 90 days or more	0	0
Commercial | CRE non-owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	23,462	17,051
Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,161,919	5,070,370
Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,092,393	3,080,635
Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,794	33,286
Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,506	249
Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	48,848	35,704
Non-accrual loans	48,848	35,704
Accruing loans past-due 90 days or more	0	0
Commercial | CRE owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	54,148	69,239
Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,038,245	3,011,396
Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,400,553	7,126,121
Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	30,552	14,813
Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	9,006	4,049
Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	29,262	40,091
Non-accrual loans	24,885	36,598
Accruing loans past-due 90 days or more	4,377	3,493
Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	68,820	58,953
Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,331,733	7,067,168
Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,887,052	1,731,809
Leasing | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	19,840	20,140
Leasing | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4,661	6,719
Leasing | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,367	8,632
Non-accrual loans	7,367	8,632
Accruing loans past-due 90 days or more	0	0
Leasing | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	31,868	35,491
Leasing | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,855,184	1,696,318
Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,186,893	1,135,747
Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	16,210	13,243
Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,415	9,912
Consumer | Credit card | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	27,214	23,281
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	27,214	23,281
Consumer | Credit card | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	54,839	46,436
Consumer | Credit card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,132,054	1,089,311
Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	69,691	65,953
Consumer | Home equity lines of credit | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	74	1,702
Consumer | Home equity lines of credit | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	984	4
Consumer | Home equity lines of credit | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,834	3,759
Non-accrual loans	3,834	3,733
Accruing loans past-due 90 days or more	0	26
Consumer | Home equity lines of credit | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4,892	5,465
Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	64,799	60,488
Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,873,175	1,945,247
Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	23,422	21,287
Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	15,168	16,559
Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	22,844	21,836
Non-accrual loans	22,829	21,836
Accruing loans past-due 90 days or more	15	0
Consumer | Personal loans | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	61,434	59,682
Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,811,741	1,885,565
Consumer | Auto Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,818,607	3,660,780
Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	104,363	100,061
Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	26,090	27,443
Consumer | Auto Loan | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	47,828	45,615
Non-accrual loans	47,828	45,615
Accruing loans past-due 90 days or more	0	0
Consumer | Auto Loan | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	178,281	173,119
Consumer | Auto Loan | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,640,326	3,487,661
Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	169,265	160,441
Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	737	1,645
Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,008	204
Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,190	1,214
Non-accrual loans	891	965
Accruing loans past-due 90 days or more	299	249
Consumer | Other | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,935	3,063
Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	166,330	157,378
Puerto Rico
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	25,725,474	24,510,923
Puerto Rico | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	431,740	431,035
Puerto Rico | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	186,960	176,849
Puerto Rico | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	522,589	597,080
Non-accrual loans	288,815	328,718
Accruing loans past-due 90 days or more	233,774	268,362
Puerto Rico | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,141,289	1,204,964
Puerto Rico | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	24,584,185	23,305,959
Puerto Rico | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	190,343	169,857
Puerto Rico | Construction | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Puerto Rico | Construction | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Puerto Rico | Construction | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	6,378
Non-accrual loans	0	6,378
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Construction | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	6,378
Puerto Rico | Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	190,343	163,479
Puerto Rico | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,695,417	6,391,824
Puerto Rico | Mortgages | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	246,220	260,897
Puerto Rico | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	122,592	114,282
Puerto Rico | Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	359,986	416,528
Non-accrual loans	157,920	175,106
Accruing loans past-due 90 days or more	202,066	241,422
Puerto Rico | Mortgages | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	728,798	791,707
Puerto Rico | Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,966,619	5,600,117
Puerto Rico | Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	305,534	291,942
Puerto Rico | Commercial | Commercial multi-family | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,866	524
Puerto Rico | Commercial | Commercial multi-family | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Puerto Rico | Commercial | Commercial multi-family | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	87	1,991
Non-accrual loans	87	1,991
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Commercial | Commercial multi-family | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,953	2,515
Puerto Rico | Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	303,581	289,427
Puerto Rico | Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,148,255	3,005,254
Puerto Rico | Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	170	5,510
Puerto Rico | Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	174	77
Puerto Rico | Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,493	8,745
Non-accrual loans	7,493	8,745
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Commercial | CRE non-owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,837	14,332
Puerto Rico | Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,140,418	2,990,922
Puerto Rico | Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,403,850	1,398,383
Puerto Rico | Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,544	2,726
Puerto Rico | Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,681	249
Puerto Rico | Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	26,600	29,430
Non-accrual loans	26,600	29,430
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Commercial | CRE owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	29,825	32,405
Puerto Rico | Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,374,025	1,365,978
Puerto Rico | Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,176,125	4,796,226
Puerto Rico | Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	19,074	6,998
Puerto Rico | Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,694	3,352
Puerto Rico | Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	23,819	36,210
Non-accrual loans	19,639	32,826
Accruing loans past-due 90 days or more	4,180	3,384
Puerto Rico | Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	49,587	46,560
Puerto Rico | Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,126,538	4,749,666
Puerto Rico | Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,887,052	1,731,809
Puerto Rico | Leasing | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	19,840	20,140
Puerto Rico | Leasing | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4,661	6,719
Puerto Rico | Leasing | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,367	8,632
Non-accrual loans	7,367	8,632
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Leasing | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	31,868	35,491
Puerto Rico | Leasing | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,855,184	1,696,318
Puerto Rico | Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,186,889	1,135,728
Puerto Rico | Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	16,210	13,243
Puerto Rico | Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,415	9,912
Puerto Rico | Consumer | Credit card | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	27,214	23,281
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	27,214	23,281
Puerto Rico | Consumer | Credit card | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	54,839	46,436
Puerto Rico | Consumer | Credit card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,132,050	1,089,292
Puerto Rico | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,131	2,648
Puerto Rico | Consumer | Home equity lines of credit | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	230
Puerto Rico | Consumer | Home equity lines of credit | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Puerto Rico | Consumer | Home equity lines of credit | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	26
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	0	26
Puerto Rico | Consumer | Home equity lines of credit | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	256
Puerto Rico | Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,131	2,392
Puerto Rico | Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,754,081	1,776,310
Puerto Rico | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	21,726	19,065
Puerto Rico | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	13,153	14,611
Puerto Rico | Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	21,007	19,031
Non-accrual loans	20,992	19,031
Accruing loans past-due 90 days or more	15	0
Puerto Rico | Consumer | Personal loans | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	55,886	52,707
Puerto Rico | Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,698,195	1,723,603
Puerto Rico | Consumer | Auto Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,818,607	3,660,780
Puerto Rico | Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	104,363	100,061
Puerto Rico | Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	26,090	27,443
Puerto Rico | Consumer | Auto Loan | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	47,828	45,615
Non-accrual loans	47,828	45,615
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Consumer | Auto Loan | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	178,281	173,119
Puerto Rico | Consumer | Auto Loan | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,640,326	3,487,661
Puerto Rico | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	157,190	150,162
Puerto Rico | Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	727	1,641
Puerto Rico | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	500	204
Puerto Rico | Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,188	1,213
Non-accrual loans	889	964
Accruing loans past-due 90 days or more	299	249
Puerto Rico | Consumer | Other | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,415	3,058
Puerto Rico | Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	154,775	147,104
Popular U.S.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,469,493	10,554,048
Popular U.S. | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	25,797	100,598
Popular U.S. | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	48,646	13,507
Popular U.S. | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	72,780	29,002
Non-accrual loans	72,583	28,893
Accruing loans past-due 90 days or more	197	109
Popular U.S. | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	147,223	143,107
Popular U.S. | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,322,270	10,410,941
Popular U.S. | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	922,964	789,423
Popular U.S. | Construction | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Popular U.S. | Construction | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	34,349	0
Popular U.S. | Construction | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Construction | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	34,349	0
Popular U.S. | Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	888,615	789,423
Popular U.S. | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,297,931	1,304,093
Popular U.S. | Mortgages | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	899	48,818
Popular U.S. | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,640	7,821
Popular U.S. | Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	28,434	11,191
Non-accrual loans	28,434	11,191
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Mortgages | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	32,973	67,830
Popular U.S. | Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,264,958	1,236,263
Popular U.S. | Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,099,768	2,123,678
Popular U.S. | Commercial | Commercial multi-family | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,060	9,141
Popular U.S. | Commercial | Commercial multi-family | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	2,001
Popular U.S. | Commercial | Commercial multi-family | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	8,700	0
Non-accrual loans	8,700	0
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Commercial | Commercial multi-family | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	9,760	11,142
Popular U.S. | Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,090,008	2,112,536
Popular U.S. | Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,037,126	2,082,167
Popular U.S. | Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,330	566
Popular U.S. | Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,013	1,036
Popular U.S. | Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,282	1,117
Non-accrual loans	2,282	1,117
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Commercial | CRE non-owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	15,625	2,719
Popular U.S. | Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,021,501	2,079,448
Popular U.S. | Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,688,543	1,682,252
Popular U.S. | Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	250	30,560
Popular U.S. | Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,825	0
Popular U.S. | Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	22,248	6,274
Non-accrual loans	22,248	6,274
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Commercial | CRE owner occupied | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	24,323	36,834
Popular U.S. | Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,664,220	1,645,418
Popular U.S. | Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,224,428	2,329,895
Popular U.S. | Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,478	7,815
Popular U.S. | Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,312	697
Popular U.S. | Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,443	3,881
Non-accrual loans	5,246	3,772
Accruing loans past-due 90 days or more	197	109
Popular U.S. | Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	19,233	12,393
Popular U.S. | Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,205,195	2,317,502
Popular U.S. | Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4	19
Popular U.S. | Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Popular U.S. | Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Popular U.S. | Consumer | Credit card | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Consumer | Credit card | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Popular U.S. | Consumer | Credit card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4	19
Popular U.S. | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	67,560	63,305
Popular U.S. | Consumer | Home equity lines of credit | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	74	1,472
Popular U.S. | Consumer | Home equity lines of credit | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	984	4
Popular U.S. | Consumer | Home equity lines of credit | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,834	3,733
Non-accrual loans	3,834	3,733
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Consumer | Home equity lines of credit | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	4,892	5,209
Popular U.S. | Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	62,668	58,096
Popular U.S. | Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	119,094	168,937
Popular U.S. | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,696	2,222
Popular U.S. | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,015	1,948
Popular U.S. | Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,837	2,805
Non-accrual loans	1,837	2,805
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Consumer | Personal loans | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,548	6,975
Popular U.S. | Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	113,546	161,962
Popular U.S. | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	12,075	10,279
Popular U.S. | Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10	4
Popular U.S. | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	508	0
Popular U.S. | Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2	1
Non-accrual loans	2	1
Accruing loans past-due 90 days or more	0	0
Popular U.S. | Consumer | Other | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	520	5
Popular U.S. | Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	$ 11,555	$ 10,274