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	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	$ 37,107,652	$ 35,064,971
Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	496,858	531,633
Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	198,641	190,356
Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	593,220	626,082
Non-accrual loans	350,780	357,611
Accruing loans past-due 90 days or more	242,440	268,471
Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,288,719	1,348,071
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	35,818,933	33,716,900
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,263,792	959,280
Construction | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,039	0
Construction | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	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	1,039	6,378
Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,262,753	952,902
Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	8,114,183	7,695,917
Mortgages | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	280,370	309,715
Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	122,111	122,103
Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	395,649	427,719
Non-accrual loans	188,332	186,297
Accruing loans past-due 90 days or more	207,317	241,422
Mortgages | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	798,130	859,537
Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,316,053	6,836,380
Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,399,620	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	1,491	9,665
Commercial | Commercial multi-family | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,556	2,001
Commercial | Commercial multi-family | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	8,779	1,991
Non-accrual loans	8,779	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	15,826	13,657
Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,383,794	2,401,963
Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,363,235	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	9,895	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	586	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	14,444	9,862
Non-accrual loans	14,444	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	24,925	17,051
Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,338,310	5,070,370
Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,157,746	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	11,054	33,286
Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	808	249
Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	30,449	35,704
Non-accrual loans	30,449	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	42,311	69,239
Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,115,435	3,011,396
Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,741,562	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	16,074	14,813
Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	8,035	4,049
Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	25,833	40,091
Non-accrual loans	21,083	36,598
Accruing loans past-due 90 days or more	4,750	3,493
Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	49,942	58,953
Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	7,691,620	7,067,168
Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,925,405	1,731,809
Leasing | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	23,991	20,140
Leasing | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,062	6,719
Leasing | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	9,588	8,632
Non-accrual loans	9,588	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	39,641	35,491
Leasing | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,885,764	1,696,318
Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,218,079	1,135,747
Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	17,399	13,243
Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,719	9,912
Consumer | Credit card | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	29,960	23,281
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	29,960	23,281
Consumer | Credit card | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	59,078	46,436
Consumer | Credit card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,159,001	1,089,311
Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	73,571	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	546	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	1,115	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	3,393	3,759
Non-accrual loans	3,393	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	5,054	5,465
Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	68,517	60,488
Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,855,244	1,945,247
Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	21,311	21,287
Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	14,514	16,559
Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	22,010	21,836
Non-accrual loans	22,010	21,836
Accruing loans past-due 90 days or more	0	0
Consumer | Personal loans | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	57,835	59,682
Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,797,409	1,885,565
Consumer | Auto Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,823,437	3,660,780
Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	111,358	100,061
Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	27,858	27,443
Consumer | Auto Loan | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	51,792	45,615
Non-accrual loans	51,792	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	191,008	173,119
Consumer | Auto Loan | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,632,429	3,487,661
Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	171,778	160,441
Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,330	1,645
Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	277	204
Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,323	1,214
Non-accrual loans	910	965
Accruing loans past-due 90 days or more	413	249
Consumer | Other | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,930	3,063
Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	167,848	157,378
Puerto Rico
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	26,179,021	24,510,923
Puerto Rico | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	458,730	431,035
Puerto Rico | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	179,963	176,849
Puerto Rico | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	534,341	597,080
Non-accrual loans	292,091	328,718
Accruing loans past-due 90 days or more	242,250	268,362
Puerto Rico | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,173,034	1,204,964
Puerto Rico | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	25,005,987	23,305,959
Puerto Rico | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	212,290	169,857
Puerto Rico | Construction | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,039	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	1,039	6,378
Puerto Rico | Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	211,251	163,479
Puerto Rico | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,809,881	6,391,824
Puerto Rico | Mortgages | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	262,222	260,897
Puerto Rico | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	116,694	114,282
Puerto Rico | Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	365,759	416,528
Non-accrual loans	158,442	175,106
Accruing loans past-due 90 days or more	207,317	241,422
Puerto Rico | Mortgages | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	744,675	791,707
Puerto Rico | Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,065,206	5,600,117
Puerto Rico | Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	308,001	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	1,491	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	113	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	79	1,991
Non-accrual loans	79	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	1,683	2,515
Puerto Rico | Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	306,318	289,427
Puerto Rico | Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,246,503	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	3,103	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	586	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	6,429	8,745
Non-accrual loans	6,429	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	10,118	14,332
Puerto Rico | Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,236,385	2,990,922
Puerto Rico | Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,375,911	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	11,054	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	808	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	25,258	29,430
Non-accrual loans	25,258	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	37,120	32,405
Puerto Rico | Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,338,791	1,365,978
Puerto Rico | Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,346,894	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	5,738	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	2,712	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	23,895	36,210
Non-accrual loans	19,335	32,826
Accruing loans past-due 90 days or more	4,560	3,384
Puerto Rico | Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	32,345	46,560
Puerto Rico | Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,314,549	4,749,666
Puerto Rico | Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,925,405	1,731,809
Puerto Rico | Leasing | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	23,991	20,140
Puerto Rico | Leasing | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	6,062	6,719
Puerto Rico | Leasing | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	9,588	8,632
Non-accrual loans	9,588	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	39,641	35,491
Puerto Rico | Leasing | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,885,764	1,696,318
Puerto Rico | Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,218,053	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	17,399	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	11,719	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	29,960	23,281
Non-accrual loans	0	0
Accruing loans past-due 90 days or more	29,960	23,281
Puerto Rico | Consumer | Credit card | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	59,078	46,436
Puerto Rico | Consumer | Credit card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,158,975	1,089,292
Puerto Rico | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,040	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	16	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	129	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	145	256
Puerto Rico | Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,895	2,392
Puerto Rico | Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,750,377	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	19,503	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	13,005	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	20,269	19,031
Non-accrual loans	20,269	19,031
Accruing loans past-due 90 days or more	0	0
Puerto Rico | Consumer | Personal loans | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	52,777	52,707
Puerto Rico | Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,697,600	1,723,603
Puerto Rico | Consumer | Auto Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,823,437	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	111,358	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	27,858	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	51,792	45,615
Non-accrual loans	51,792	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	191,008	173,119
Puerto Rico | Consumer | Auto Loan | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,632,429	3,487,661
Puerto Rico | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	160,229	150,162
Puerto Rico | Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,816	1,641
Puerto Rico | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	277	204
Puerto Rico | Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,312	1,213
Non-accrual loans	899	964
Accruing loans past-due 90 days or more	413	249
Puerto Rico | Consumer | Other | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	3,405	3,058
Puerto Rico | Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	156,824	147,104
Popular U.S.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,928,631	10,554,048
Popular U.S. | Past Due 30 To 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	38,128	100,598
Popular U.S. | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	18,678	13,507
Popular U.S. | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	58,879	29,002
Non-accrual loans	58,689	28,893
Accruing loans past-due 90 days or more	190	109
Popular U.S. | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	115,685	143,107
Popular U.S. | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	10,812,946	10,410,941
Popular U.S. | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,051,502	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	0	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	0	0
Popular U.S. | Construction | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,051,502	789,423
Popular U.S. | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,304,302	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	18,148	48,818
Popular U.S. | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	5,417	7,821
Popular U.S. | Mortgages | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	29,890	11,191
Non-accrual loans	29,890	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	53,455	67,830
Popular U.S. | Mortgages | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,250,847	1,236,263
Popular U.S. | Commercial | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,091,619	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	0	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	5,443	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	14,143	11,142
Popular U.S. | Commercial | Commercial multi-family | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,077,476	2,112,536
Popular U.S. | Commercial | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,116,732	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	6,792	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	0	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	8,015	1,117
Non-accrual loans	8,015	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	14,807	2,719
Popular U.S. | Commercial | CRE non-owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,101,925	2,079,448
Popular U.S. | Commercial | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,781,835	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	0	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	0	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	5,191	6,274
Non-accrual loans	5,191	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	5,191	36,834
Popular U.S. | Commercial | CRE owner occupied | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	1,776,644	1,645,418
Popular U.S. | Commercial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,394,668	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	10,336	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	5,323	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	1,938	3,881
Non-accrual loans	1,748	3,772
Accruing loans past-due 90 days or more	190	109
Popular U.S. | Commercial | Commercial and Industrial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	17,597	12,393
Popular U.S. | Commercial | Commercial and Industrial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	2,377,071	2,317,502
Popular U.S. | Consumer | Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	26	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	26	19
Popular U.S. | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	71,531	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	530	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	986	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	3,393	3,733
Non-accrual loans	3,393	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	4,909	5,209
Popular U.S. | Consumer | Home equity lines of credit | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	66,622	58,096
Popular U.S. | Consumer | Personal loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	104,867	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	1,808	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	1,509	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	1,741	2,805
Non-accrual loans	1,741	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	5,058	6,975
Popular U.S. | Consumer | Personal loans | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	99,809	161,962
Popular U.S. | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11,549	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	514	4
Popular U.S. | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	0	0
Popular U.S. | Consumer | Other | Past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	11	1
Non-accrual loans	11	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	525	5
Popular U.S. | Consumer | Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held in portfolio	$ 11,024	$ 10,274