Allowance for credit losses - Performance of loans modified (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Financing Receivable
Loan performance in the last 12 months after modification	$ 68,642
Past due
Financing Receivable
Loan performance in the last 12 months after modification	11,437
Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	1,229
Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	226
Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	9,982
Payment default	333
Financing Receivable Modified Past 12 Months Without Payment Default	9,649
Current
Financing Receivable
Loan performance in the last 12 months after modification	57,205
Construction
Financing Receivable
Loan performance in the last 12 months after modification	3,518
Construction | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Construction | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Construction | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Construction | Past due 90 days or more
Financing Receivable
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
Loan performance in the last 12 months after modification	3,518
Mortgages
Financing Receivable
Loan performance in the last 12 months after modification	27,402
Mortgages | Past due
Financing Receivable
Loan performance in the last 12 months after modification	9,004
Mortgages | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	1,202
Mortgages | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	180
Mortgages | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	7,622
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	7,622
Mortgages | Current
Financing Receivable
Loan performance in the last 12 months after modification	18,398
Commercial | CRE non-owner occupied
Financing Receivable
Loan performance in the last 12 months after modification	1,751
Commercial | CRE non-owner occupied | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | CRE non-owner occupied | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | CRE non-owner occupied | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Commercial | CRE non-owner occupied | Current
Financing Receivable
Loan performance in the last 12 months after modification	1,751
Commercial | CRE owner occupied
Financing Receivable
Loan performance in the last 12 months after modification	28,755
Commercial | CRE owner occupied | Past due
Financing Receivable
Loan performance in the last 12 months after modification	1,803
Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	1,803
Payment default	209
Financing Receivable Modified Past 12 Months Without Payment Default	1,594
Commercial | CRE owner occupied | Current
Financing Receivable
Loan performance in the last 12 months after modification	26,952
Commercial | Commercial and Industrial
Financing Receivable
Loan performance in the last 12 months after modification	5,980
Commercial | Commercial and Industrial | Past due
Financing Receivable
Loan performance in the last 12 months after modification	142
Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	142
Payment default	28
Financing Receivable Modified Past 12 Months Without Payment Default	114
Commercial | Commercial and Industrial | Current
Financing Receivable
Loan performance in the last 12 months after modification	5,838
Consumer | Credit card
Financing Receivable
Loan performance in the last 12 months after modification	497
Consumer | Credit card | Past due
Financing Receivable
Loan performance in the last 12 months after modification	163
Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	21
Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	46
Consumer | Credit card | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	96
Payment default	96
Financing Receivable Modified Past 12 Months Without Payment Default	0
Consumer | Credit card | Current
Financing Receivable
Loan performance in the last 12 months after modification	334
Consumer | Personal loans
Financing Receivable
Loan performance in the last 12 months after modification	674
Consumer | Personal loans | Past due
Financing Receivable
Loan performance in the last 12 months after modification	292
Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	6
Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Personal loans | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	286
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	286
Consumer | Personal loans | Current
Financing Receivable
Loan performance in the last 12 months after modification	382
Consumer | Auto Loan
Financing Receivable
Loan performance in the last 12 months after modification	29
Consumer | Auto Loan | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Auto Loan | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	0
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	0
Consumer | Auto Loan | Current
Financing Receivable
Loan performance in the last 12 months after modification	29
Consumer | Other
Financing Receivable
Loan performance in the last 12 months after modification	36
Consumer | Other | Past due
Financing Receivable
Loan performance in the last 12 months after modification	33
Consumer | Other | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Other | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Consumer | Other | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	33
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	33
Consumer | Other | Current
Financing Receivable
Loan performance in the last 12 months after modification	3
Puerto Rico
Financing Receivable
Loan performance in the last 12 months after modification	48,281
Puerto Rico | Past due
Financing Receivable
Loan performance in the last 12 months after modification	11,279
Puerto Rico | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	1,229
Puerto Rico | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	226
Puerto Rico | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	9,824
Payment default	333
Financing Receivable Modified Past 12 Months Without Payment Default	9,491
Puerto Rico | Current
Financing Receivable
Loan performance in the last 12 months after modification	37,002
Puerto Rico | Mortgages
Financing Receivable
Loan performance in the last 12 months after modification	25,221
Puerto Rico | Mortgages | Past due
Financing Receivable
Loan performance in the last 12 months after modification	8,900
Puerto Rico | Mortgages | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	1,202
Puerto Rico | Mortgages | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	180
Puerto Rico | Mortgages | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	7,518
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	7,518
Puerto Rico | Mortgages | Current
Financing Receivable
Loan performance in the last 12 months after modification	16,321
Puerto Rico | Commercial | CRE non-owner occupied
Financing Receivable
Loan performance in the last 12 months after modification	1,751
Puerto Rico | Commercial | CRE non-owner occupied | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE non-owner occupied | Past Due 30 To 59 Days
Financing Receivable
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
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
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 | Commercial | CRE non-owner occupied | Current
Financing Receivable
Loan performance in the last 12 months after modification	1,751
Puerto Rico | Commercial | CRE owner occupied
Financing Receivable
Loan performance in the last 12 months after modification	15,011
Puerto Rico | Commercial | CRE owner occupied | Past due
Financing Receivable
Loan performance in the last 12 months after modification	1,803
Puerto Rico | Commercial | CRE owner occupied | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE owner occupied | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | CRE owner occupied | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	1,803
Payment default	209
Financing Receivable Modified Past 12 Months Without Payment Default	1,594
Puerto Rico | Commercial | CRE owner occupied | Current
Financing Receivable
Loan performance in the last 12 months after modification	13,208
Puerto Rico | Commercial | Commercial and Industrial
Financing Receivable
Loan performance in the last 12 months after modification	5,116
Puerto Rico | Commercial | Commercial and Industrial | Past due
Financing Receivable
Loan performance in the last 12 months after modification	142
Puerto Rico | Commercial | Commercial and Industrial | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | Commercial and Industrial | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Commercial | Commercial and Industrial | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	142
Payment default	28
Financing Receivable Modified Past 12 Months Without Payment Default	114
Puerto Rico | Commercial | Commercial and Industrial | Current
Financing Receivable
Loan performance in the last 12 months after modification	4,974
Puerto Rico | Consumer | Credit card
Financing Receivable
Loan performance in the last 12 months after modification	497
Puerto Rico | Consumer | Credit card | Past due
Financing Receivable
Loan performance in the last 12 months after modification	163
Puerto Rico | Consumer | Credit card | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	21
Puerto Rico | Consumer | Credit card | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	46
Puerto Rico | Consumer | Credit card | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	96
Payment default	96
Financing Receivable Modified Past 12 Months Without Payment Default	0
Puerto Rico | Consumer | Credit card | Current
Financing Receivable
Loan performance in the last 12 months after modification	334
Puerto Rico | Consumer | Personal loans
Financing Receivable
Loan performance in the last 12 months after modification	620
Puerto Rico | Consumer | Personal loans | Past due
Financing Receivable
Loan performance in the last 12 months after modification	238
Puerto Rico | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	6
Puerto Rico | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Personal loans | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	232
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	232
Puerto Rico | Consumer | Personal loans | Current
Financing Receivable
Loan performance in the last 12 months after modification	382
Puerto Rico | Consumer | Auto Loan
Financing Receivable
Loan performance in the last 12 months after modification	29
Puerto Rico | Consumer | Auto Loan | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Auto Loan | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Auto Loan | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Auto Loan | Past due 90 days or more
Financing Receivable
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 | Auto Loan | Current
Financing Receivable
Loan performance in the last 12 months after modification	29
Puerto Rico | Consumer | Other
Financing Receivable
Loan performance in the last 12 months after modification	36
Puerto Rico | Consumer | Other | Past due
Financing Receivable
Loan performance in the last 12 months after modification	33
Puerto Rico | Consumer | Other | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Other | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Puerto Rico | Consumer | Other | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	33
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	33
Puerto Rico | Consumer | Other | Current
Financing Receivable
Loan performance in the last 12 months after modification	3
Popular U.S.
Financing Receivable
Loan performance in the last 12 months after modification	20,361
Popular U.S. | Past due
Financing Receivable
Loan performance in the last 12 months after modification	158
Popular U.S. | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	158
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	158
Popular U.S. | Current
Financing Receivable
Loan performance in the last 12 months after modification	20,203
Popular U.S. | Construction
Financing Receivable
Loan performance in the last 12 months after modification	3,518
Popular U.S. | Construction | Past due
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Construction | Past due 90 days or more
Financing Receivable
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
Loan performance in the last 12 months after modification	3,518
Popular U.S. | Mortgages
Financing Receivable
Loan performance in the last 12 months after modification	2,181
Popular U.S. | Mortgages | Past due
Financing Receivable
Loan performance in the last 12 months after modification	104
Popular U.S. | Mortgages | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Mortgages | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Mortgages | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	104
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	104
Popular U.S. | Mortgages | Current
Financing Receivable
Loan performance in the last 12 months after modification	2,077
Popular U.S. | Commercial | CRE owner occupied
Financing Receivable
Loan performance in the last 12 months after modification	13,744
Popular U.S. | Commercial | CRE owner occupied | Past due
Financing Receivable
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
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
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
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
Loan performance in the last 12 months after modification	13,744
Popular U.S. | Commercial | Commercial and Industrial
Financing Receivable
Loan performance in the last 12 months after modification	864
Popular U.S. | Commercial | Commercial and Industrial | Past due
Financing Receivable
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
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
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
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
Loan performance in the last 12 months after modification	864
Popular U.S. | Consumer | Personal loans
Financing Receivable
Loan performance in the last 12 months after modification	54
Popular U.S. | Consumer | Personal loans | Past due
Financing Receivable
Loan performance in the last 12 months after modification	54
Popular U.S. | Consumer | Personal loans | Past Due 30 To 59 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Consumer | Personal loans | Past Due 60 To 89 Days
Financing Receivable
Loan performance in the last 12 months after modification	0
Popular U.S. | Consumer | Personal loans | Past due 90 days or more
Financing Receivable
Loan performance in the last 12 months after modification	54
Payment default	0
Financing Receivable Modified Past 12 Months Without Payment Default	54
Popular U.S. | Consumer | Personal loans | Current
Financing Receivable
Loan performance in the last 12 months after modification	$ 0