Allowance for credit losses - Allowance Movement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Losses
Beginning balance	$ 720,302	$ 695,366
Impact of adopting ASU 2022-02	(45,583)
Provision for credit losses (benefit)	47,146	(14,405)
Allowance for credit losses - PCD Loans	68	612
Charge-offs	(54,153)	(25,752)
Recoveries	21,340	21,971
Ending balance	689,120	677,792
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	8,805	7,897
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	610	(843)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	9,415	7,054
Construction
Financing Receivable, Allowance for Credit Losses
Beginning balance	4,246	6,363
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	84	(1,368)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	1,544
Ending balance	4,330	6,539
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	3,206	4,725
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	18	(666)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	3,224	4,059
Mortgages
Financing Receivable, Allowance for Credit Losses
Beginning balance	135,254	154,478
Impact of adopting ASU 2022-02	(35,654)
Provision for credit losses (benefit)	841	(8,896)
Allowance for credit losses - PCD Loans	68	612
Charge-offs	(846)	(1,321)
Recoveries	4,814	4,333
Ending balance	104,477	149,206
Commercial
Financing Receivable, Allowance for Credit Losses
Beginning balance	235,376	215,805
Impact of adopting ASU 2022-02	(1,713)
Provision for credit losses (benefit)	6,769	(16,019)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(2,109)	(654)
Recoveries	5,656	5,511
Ending balance	243,979	204,643
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	5,511	3,135
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	618	(170)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	6,129	2,965
Commercial | Commercial multi-family
Financing Receivable, Allowance for Credit Losses
Beginning balance	26,311	28,468
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(947)	(2,385)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	2	7
Ending balance	25,366	26,090
Commercial | CRE non-owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	71,540	67,457
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(1,677)	(607)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	1,987	187
Ending balance	71,850	67,037
Commercial | CRE owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	57,081	60,229
Impact of adopting ASU 2022-02	(1,161)
Provision for credit losses (benefit)	(2,954)	(6,255)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(3)	(118)
Recoveries	1,534	3,172
Ending balance	54,497	57,028
Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses
Beginning balance	80,444	59,651
Impact of adopting ASU 2022-02	(552)
Provision for credit losses (benefit)	12,347	(6,772)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(2,106)	(536)
Recoveries	2,133	2,145
Ending balance	92,266	54,488
Leasing
Financing Receivable, Allowance for Credit Losses
Beginning balance	20,618	17,578
Impact of adopting ASU 2022-02	(35)
Provision for credit losses (benefit)	734	386
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(1,417)	(407)
Recoveries	1,090	841
Ending balance	20,990	18,398
Consumer
Financing Receivable, Allowance for Credit Losses
Beginning balance	324,808	301,142
Impact of adopting ASU 2022-02	(8,181)
Provision for credit losses (benefit)	38,718	11,492
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(49,781)	(23,370)
Recoveries	9,780	9,742
Ending balance	315,344	299,006
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	88	37
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(26)	(7)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	62	30
Consumer | Credit card
Financing Receivable, Allowance for Credit Losses
Beginning balance	58,670	43,499
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	15,571	3,692
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(8,677)	(5,683)
Recoveries	2,389	2,274
Ending balance	67,953	43,782
Consumer | HELOC
Financing Receivable, Allowance for Credit Losses
Beginning balance	2,542	3,806
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(751)	(1,008)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(176)	(100)
Recoveries	338	1,013
Ending balance	1,953	3,711
Consumer | Personal loans
Financing Receivable, Allowance for Credit Losses
Beginning balance	118,426	83,722
Impact of adopting ASU 2022-02	(8,160)
Provision for credit losses (benefit)	15,295	6,229
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(17,750)	(8,076)
Recoveries	1,918	2,090
Ending balance	109,729	83,965
Consumer | Auto Loan
Financing Receivable, Allowance for Credit Losses
Beginning balance	129,735	154,498
Impact of adopting ASU 2022-02	(21)
Provision for credit losses (benefit)	8,319	2,693
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(12,118)	(8,878)
Recoveries	4,914	4,017
Ending balance	130,829	152,330
Consumer | Other
Financing Receivable, Allowance for Credit Losses
Beginning balance	15,435	15,617
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	284	(114)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(11,060)	(633)
Recoveries	221	348
Ending balance	4,880	15,218
Puerto Rico
Financing Receivable, Allowance for Credit Losses
Beginning balance	615,545	594,162
Impact of adopting ASU 2022-02	(42,345)
Provision for credit losses (benefit)	45,203	(12,661)
Allowance for credit losses - PCD Loans	68	612
Charge-offs	(49,287)	(24,320)
Recoveries	17,823	18,818
Ending balance	587,007	576,611
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	6,358	4,139
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	488	(568)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	6,846	3,571
Puerto Rico | Construction
Financing Receivable, Allowance for Credit Losses
Beginning balance	2,978	1,641
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	94	357
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	416
Ending balance	3,072	2,414
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	2,022	2,388
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(76)	(464)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	1,946	1,924
Puerto Rico | Mortgages
Financing Receivable, Allowance for Credit Losses
Beginning balance	117,344	138,286
Impact of adopting ASU 2022-02	(33,556)
Provision for credit losses (benefit)	1,267	(10,528)
Allowance for credit losses - PCD Loans	68	612
Charge-offs	(846)	(1,321)
Recoveries	4,800	4,313
Ending balance	89,077	131,362
Puerto Rico | Commercial
Financing Receivable, Allowance for Credit Losses
Beginning balance	174,295	151,928
Impact of adopting ASU 2022-02	(1,713)
Provision for credit losses (benefit)	7,919	(10,687)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(1,610)	(527)
Recoveries	2,810	4,757
Ending balance	181,701	145,471
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	4,336	1,751
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	564	(104)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	4,900	1,647
Puerto Rico | Commercial | Commercial multi-family
Financing Receivable, Allowance for Credit Losses
Beginning balance	5,210	3,050
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(454)	385
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Ending balance	4,756	3,435
Puerto Rico | Commercial | CRE non-owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	52,475	45,211
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	1,284	6,244
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	135	184
Ending balance	53,894	51,639
Puerto Rico | Commercial | CRE owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	48,393	54,176
Impact of adopting ASU 2022-02	(1,161)
Provision for credit losses (benefit)	(2,730)	(10,091)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(3)	(118)
Recoveries	1,510	3,060
Ending balance	46,009	47,027
Puerto Rico | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses
Beginning balance	68,217	49,491
Impact of adopting ASU 2022-02	(552)
Provision for credit losses (benefit)	9,819	(7,225)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(1,607)	(409)
Recoveries	1,165	1,513
Ending balance	77,042	43,370
Puerto Rico | Leasing
Financing Receivable, Allowance for Credit Losses
Beginning balance	20,618	17,578
Impact of adopting ASU 2022-02	(35)
Provision for credit losses (benefit)	734	386
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(1,417)	(407)
Recoveries	1,090	841
Ending balance	20,990	18,398
Puerto Rico | Consumer
Financing Receivable, Allowance for Credit Losses
Beginning balance	300,310	284,729
Impact of adopting ASU 2022-02	(7,041)
Provision for credit losses (benefit)	35,189	7,811
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(45,414)	(22,065)
Recoveries	9,123	8,491
Ending balance	292,167	278,966
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	0	0
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	0	0
Allowance for credit losses - PCD Loans	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	0	0
Puerto Rico | Consumer | Credit card
Financing Receivable, Allowance for Credit Losses
Beginning balance	58,670	43,499
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	15,570	3,701
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(8,676)	(5,683)
Recoveries	2,389	2,265
Ending balance	67,953	43,782
Puerto Rico | Consumer | HELOC
Financing Receivable, Allowance for Credit Losses
Beginning balance	103	98
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(39)	(16)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(33)	(90)
Recoveries	69	94
Ending balance	100	86
Puerto Rico | Consumer | Personal loans
Financing Receivable, Allowance for Credit Losses
Beginning balance	96,369	71,022
Impact of adopting ASU 2022-02	(7,020)
Provision for credit losses (benefit)	11,104	1,613
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(13,580)	(6,858)
Recoveries	1,535	1,777
Ending balance	88,408	67,554
Puerto Rico | Consumer | Auto Loan
Financing Receivable, Allowance for Credit Losses
Beginning balance	129,735	154,498
Impact of adopting ASU 2022-02	(21)
Provision for credit losses (benefit)	8,319	2,693
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(12,118)	(8,878)
Recoveries	4,914	4,017
Ending balance	130,829	152,330
Puerto Rico | Consumer | Other
Financing Receivable, Allowance for Credit Losses
Beginning balance	15,433	15,612
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	235	(180)
Allowance for credit losses - PCD Loans	0	0
Charge-offs	(11,007)	(556)
Recoveries	216	338
Ending balance	4,877	15,214
Popular U.S.
Financing Receivable, Allowance for Credit Losses
Beginning balance	104,757	101,204
Impact of adopting ASU 2022-02	(3,238)
Provision for credit losses (benefit)	1,943	(1,744)
Allowance for credit losses - PCD Loans		0
Charge-offs	(4,866)	(1,432)
Recoveries	3,517	3,153
Ending balance	102,113	101,181
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	2,447	3,758
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	122	(275)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	2,569	3,483
Popular U.S. | Construction
Financing Receivable, Allowance for Credit Losses
Beginning balance	1,268	4,722
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(10)	(1,725)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	1,128
Ending balance	1,258	4,125
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	1,184	2,337
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	94	(202)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	1,278	2,135
Popular U.S. | Mortgages
Financing Receivable, Allowance for Credit Losses
Beginning balance	17,910	16,192
Impact of adopting ASU 2022-02	(2,098)
Provision for credit losses (benefit)	(426)	1,632
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	14	20
Ending balance	15,400	17,844
Popular U.S. | Commercial
Financing Receivable, Allowance for Credit Losses
Beginning balance	61,081	63,877
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(1,150)	(5,332)
Allowance for credit losses - PCD Loans		0
Charge-offs	(499)	(127)
Recoveries	2,846	754
Ending balance	62,278	59,172
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	1,175	1,384
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	54	(66)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	1,229	1,318
Popular U.S. | Commercial | Commercial multi-family
Financing Receivable, Allowance for Credit Losses
Beginning balance	21,101	25,418
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(493)	(2,770)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	2	7
Ending balance	20,610	22,655
Popular U.S. | Commercial | CRE non-owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	19,065	22,246
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(2,961)	(6,851)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	1,852	3
Ending balance	17,956	15,398
Popular U.S. | Commercial | CRE owner occupied
Financing Receivable, Allowance for Credit Losses
Beginning balance	8,688	6,053
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(224)	3,836
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	24	112
Ending balance	8,488	10,001
Popular U.S. | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses
Beginning balance	12,227	10,160
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	2,528	453
Allowance for credit losses - PCD Loans		0
Charge-offs	(499)	(127)
Recoveries	968	632
Ending balance	15,224	11,118
Popular U.S. | Leasing
Financing Receivable, Allowance for Credit Losses
Beginning balance	0	0
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	0	0
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Ending balance	0	0
Popular U.S. | Consumer
Financing Receivable, Allowance for Credit Losses
Beginning balance	24,498	16,413
Impact of adopting ASU 2022-02	(1,140)
Provision for credit losses (benefit)	3,529	3,681
Allowance for credit losses - PCD Loans		0
Charge-offs	(4,367)	(1,305)
Recoveries	657	1,251
Ending balance	23,177	20,040
Allowance for credit losses - unfunded commitments:
Balance at beginning of period	88	37
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(26)	(7)
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	62	30
Popular U.S. | Consumer | Credit card
Financing Receivable, Allowance for Credit Losses
Beginning balance	0	0
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	1	(9)
Allowance for credit losses - PCD Loans		0
Charge-offs	(1)	0
Recoveries	0	9
Ending balance	0	0
Popular U.S. | Consumer | HELOC
Financing Receivable, Allowance for Credit Losses
Beginning balance	2,439	3,708
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	(712)	(992)
Allowance for credit losses - PCD Loans		0
Charge-offs	(143)	(10)
Recoveries	269	919
Ending balance	1,853	3,625
Popular U.S. | Consumer | Personal loans
Financing Receivable, Allowance for Credit Losses
Beginning balance	22,057	12,700
Impact of adopting ASU 2022-02	(1,140)
Provision for credit losses (benefit)	4,191	4,616
Allowance for credit losses - PCD Loans		0
Charge-offs	(4,170)	(1,218)
Recoveries	383	313
Ending balance	21,321	16,411
Popular U.S. | Consumer | Auto Loan
Financing Receivable, Allowance for Credit Losses
Beginning balance	0	0
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	0	0
Allowance for credit losses - PCD Loans		0
Charge-offs	0	0
Recoveries	0	0
Ending balance	0	0
Popular U.S. | Consumer | Other
Financing Receivable, Allowance for Credit Losses
Beginning balance	2	5
Impact of adopting ASU 2022-02	0
Provision for credit losses (benefit)	49	66
Allowance for credit losses - PCD Loans		0
Charge-offs	(53)	(77)
Recoveries	5	10
Ending balance	$ 3	$ 4