Allowance for credit losses - Performance of loans modified (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	$ 165,314
Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	25,642
Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3,224
Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,661
Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	20,757
Payment default	1,324
Financing Receivable Modified Past 12 Months Without Payment Default	19,433
Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	139,672
Construction
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	10,122
Construction | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Construction | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Construction | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Construction | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Construction | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	10,122
Mortgages
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	52,191
Mortgages | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	21,322
Mortgages | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3,158
Mortgages | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,611
Mortgages | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	16,553
Payment default	1,151
Financing Receivable Modified Past 12 Months Without Payment Default	15,402
Mortgages | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	30,869
Commercial | CRE non-owner occupied
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,721
Commercial | CRE non-owner occupied | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	428
Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	428
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	428
Commercial | CRE non-owner occupied | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,293
Commercial | CRE owner occupied
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	46,455
Commercial | CRE owner occupied | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	2,338
Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	2,338
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	2,338
Commercial | CRE owner occupied | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	44,117
Commercial | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	27,422
Commercial | Commercial and Industrial | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Payment default	114
Financing Receivable Modified Past 12 Months Without Payment Default	758
Commercial | Commercial and Industrial | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,550
Consumer | Credit card
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Consumer | Credit card | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	177
Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	36
Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	50
Consumer | Credit card | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	91
Payment default	51
Financing Receivable Modified Past 12 Months Without Payment Default	40
Consumer | Credit card | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	695
Consumer | Personal loans
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,462
Consumer | Personal loans | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	493
Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	30
Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	463
Payment default	8
Financing Receivable Modified Past 12 Months Without Payment Default	455
Consumer | Personal loans | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	969
Consumer | Auto Loan
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	66
Consumer | Auto Loan | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	12
Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Auto Loan | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	12
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	12
Consumer | Auto Loan | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	54
Consumer | Other
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3
Consumer | Other | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Consumer | Other | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Consumer | Other | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3
Puerto Rico
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	125,336
Puerto Rico | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	25,170
Puerto Rico | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3,224
Puerto Rico | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,661
Puerto Rico | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	20,285
Payment default	1,220
Financing Receivable Modified Past 12 Months Without Payment Default	19,065
Puerto Rico | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	100,166
Puerto Rico | Construction
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	5,422
Puerto Rico | Construction | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Construction | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Construction | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Construction | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Puerto Rico | Construction | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	5,422
Puerto Rico | Mortgages
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	47,268
Puerto Rico | Mortgages | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	20,982
Puerto Rico | Mortgages | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3,158
Puerto Rico | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,611
Puerto Rico | Mortgages | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	16,213
Payment default	1,047
Financing Receivable Modified Past 12 Months Without Payment Default	15,166
Puerto Rico | Mortgages | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,286
Puerto Rico | Commercial | CRE non-owner occupied
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,721
Puerto Rico | Commercial | CRE non-owner occupied | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	428
Puerto Rico | Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	428
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	428
Puerto Rico | Commercial | CRE non-owner occupied | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,293
Puerto Rico | Commercial | CRE owner occupied
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	17,090
Puerto Rico | Commercial | CRE owner occupied | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	2,338
Puerto Rico | Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	2,338
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	2,338
Puerto Rico | Commercial | CRE owner occupied | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	14,752
Puerto Rico | Commercial | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	26,600
Puerto Rico | Commercial | Commercial and Industrial | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Puerto Rico | Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Payment default	114
Financing Receivable Modified Past 12 Months Without Payment Default	758
Puerto Rico | Commercial | Commercial and Industrial | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	25,728
Puerto Rico | Consumer | Credit card
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	872
Puerto Rico | Consumer | Credit card | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	177
Puerto Rico | Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	36
Puerto Rico | Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	50
Puerto Rico | Consumer | Credit card | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	91
Payment default	51
Financing Receivable Modified Past 12 Months Without Payment Default	40
Puerto Rico | Consumer | Credit card | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	695
Puerto Rico | Consumer | Personal loans
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	1,294
Puerto Rico | Consumer | Personal loans | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	361
Puerto Rico | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	30
Puerto Rico | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	331
Payment default	8
Financing Receivable Modified Past 12 Months Without Payment Default	323
Puerto Rico | Consumer | Personal loans | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	933
Puerto Rico | Consumer | Auto Loan
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	66
Puerto Rico | Consumer | Auto Loan | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	12
Puerto Rico | Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Auto Loan | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	12
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	12
Puerto Rico | Consumer | Auto Loan | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	54
Puerto Rico | Consumer | Other
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3
Puerto Rico | Consumer | Other | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Other | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Other | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Puerto Rico | Consumer | Other | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	3
Popular U.S.
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	39,978
Popular U.S. | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	472
Popular U.S. | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	472
Payment default	104
Financing Receivable Modified Past 12 Months Without Payment Default	368
Popular U.S. | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	39,506
Popular U.S. | Construction
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	4,700
Popular U.S. | Construction | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Popular U.S. | Construction | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	4,700
Popular U.S. | Mortgages
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	4,923
Popular U.S. | Mortgages | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	340
Popular U.S. | Mortgages | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Mortgages | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Mortgages | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	340
Payment default	104
Financing Receivable Modified Past 12 Months Without Payment Default	236
Popular U.S. | Mortgages | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	4,583
Popular U.S. | Commercial | CRE owner occupied
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	29,365
Popular U.S. | Commercial | CRE owner occupied | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Popular U.S. | Commercial | CRE owner occupied | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	29,365
Popular U.S. | Commercial | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	822
Popular U.S. | Commercial | Commercial and Industrial | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Popular U.S. | Commercial | Commercial and Industrial | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	822
Popular U.S. | Consumer | Personal loans
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	168
Popular U.S. | Consumer | Personal loans | Past due
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	132
Popular U.S. | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	0
Popular U.S. | Consumer | Personal loans | Past due 90 days or more
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	132
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	132
Popular U.S. | Consumer | Personal loans | Current
Financing Receivable, Modifications [Line Items]
Loan performance in the last 12 months after modification	$ 36