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Allowance for credit losses - Credit quality indicators of loans held-in-portfolio based obligor risk ratings (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
units
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income $ 29,385,196 $ 27,406,873
Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,511,493
Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   591,291
Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   996,694
Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,067
Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   8,842
Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,113,387
Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   24,293,486
Construction    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 918,765 831,092
Construction | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   46,984
Construction | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   17,940
Construction | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   65,569
Construction | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Construction | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Construction | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   130,493
Construction | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   700,599
Mortgages    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 7,890,680 7,183,532
Mortgages | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,187
Mortgages | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,218
Mortgages | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   138,712
Mortgages | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Mortgages | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Mortgages | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   143,117
Mortgages | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   7,040,415
Legacy    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 15,473 22,105
Legacy | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   388
Legacy | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   202
Legacy | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,528
Legacy | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Legacy | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Legacy | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,118
Legacy | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,987
Commercial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   12,312,751
Commercial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,461,398
Commercial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   570,920
Commercial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   698,793
Commercial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,067
Commercial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   16
Commercial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,736,194
Commercial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   9,576,557
Commercial | Commercial multi-family    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,895,991 1,795,159
Commercial | Commercial multi-family | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   49,700
Commercial | Commercial multi-family | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   17,697
Commercial | Commercial multi-family | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   10,226
Commercial | Commercial multi-family | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Commercial | Commercial multi-family | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Commercial | Commercial multi-family | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   77,623
Commercial | Commercial multi-family | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,717,536
Commercial | CRE non-owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 4,001,143 3,978,514
Commercial | CRE non-owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   572,965
Commercial | CRE non-owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   191,193
Commercial | CRE non-owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   340,106
Commercial | CRE non-owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,290
Commercial | CRE non-owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Commercial | CRE non-owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,107,554
Commercial | CRE non-owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,870,960
Commercial | CRE owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,943,275 1,925,464
Commercial | CRE owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   220,193
Commercial | CRE owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   190,387
Commercial | CRE owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   197,203
Commercial | CRE owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,629
Commercial | CRE owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Commercial | CRE owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   609,412
Commercial | CRE owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,316,052
Commercial | Commercial and Industrial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 5,765,871 4,613,614
Commercial | Commercial and Industrial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   618,540
Commercial | Commercial and Industrial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   171,643
Commercial | Commercial and Industrial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   151,258
Commercial | Commercial and Industrial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   148
Commercial | Commercial and Industrial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   16
Commercial | Commercial and Industrial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   941,605
Commercial | Commercial and Industrial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,672,009
Leasing    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,197,661 1,059,507
Leasing | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Leasing | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Leasing | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,590
Leasing | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Leasing | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   68
Leasing | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,658
Leasing | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,055,849
Consumer    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,997,886
Consumer | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   536
Consumer | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11
Consumer | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   88,502
Consumer | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   8,758
Consumer | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   97,807
Consumer | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,900,079
Consumer | Credit cards    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 919,966 1,123,836
Consumer | Credit cards | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Credit cards | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Credit cards | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,461
Consumer | Credit cards | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Credit cards | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Credit cards | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,461
Consumer | Credit cards | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,104,375
Consumer | Home equity lines of credit    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 98,750 122,381
Consumer | Home equity lines of credit | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Home equity lines of credit | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Home equity lines of credit | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,024
Consumer | Home equity lines of credit | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Home equity lines of credit | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   7,930
Consumer | Home equity lines of credit | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   9,954
Consumer | Home equity lines of credit | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   112,427
Consumer | Personal loans    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,476,985 1,692,590
Consumer | Personal loans | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   77
Consumer | Personal loans | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Personal loans | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   21,222
Consumer | Personal loans | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Personal loans | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   403
Consumer | Personal loans | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   21,702
Consumer | Personal loans | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,670,888
Consumer | Auto Loan    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 3,132,228 2,917,522
Consumer | Auto Loan | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Auto Loan | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Auto Loan | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   30,775
Consumer | Auto Loan | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Auto Loan | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   372
Consumer | Auto Loan | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   31,147
Consumer | Auto Loan | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,886,375
Consumer | Other    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 128,408 141,557
Consumer | Other | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   459
Consumer | Other | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11
Consumer | Other | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   15,020
Consumer | Other | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Consumer | Other | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   53
Consumer | Other | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   15,543
Consumer | Other | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   126,014
Puerto Rico    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 21,573,280 20,180,232
Puerto Rico | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,282,517
Puerto Rico | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   528,419
Puerto Rico | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   792,286
Puerto Rico | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,067
Puerto Rico | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   509
Puerto Rico | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,608,798
Puerto Rico | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   17,571,434
Puerto Rico | Construction    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 157,106 137,470
Puerto Rico | Construction | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   340
Puerto Rico | Construction | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   649
Puerto Rico | Construction | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 20,771
Weighted average obligor risk rating | units   11.01
Puerto Rico | Construction | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Puerto Rico | Construction | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Construction | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   21,760
Puerto Rico | Construction | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 115,710
Weighted average obligor risk rating | units   7.85
Puerto Rico | Mortgages    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 6,770,143 $ 6,166,748
Puerto Rico | Mortgages | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,187
Puerto Rico | Mortgages | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,218
Puerto Rico | Mortgages | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   127,621
Puerto Rico | Mortgages | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Mortgages | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Mortgages | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   132,026
Puerto Rico | Mortgages | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   6,034,722
Puerto Rico | Commercial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   7,261,130
Puerto Rico | Commercial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,279,454
Puerto Rico | Commercial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   525,541
Puerto Rico | Commercial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 555,490
Weighted average obligor risk rating | units   11.25
Puerto Rico | Commercial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 5,067
Puerto Rico | Commercial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   16
Puerto Rico | Commercial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,365,568
Puerto Rico | Commercial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 4,895,562
Weighted average obligor risk rating | units   7.10
Puerto Rico | Commercial | Commercial multi-family    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 152,280 $ 147,849
Puerto Rico | Commercial | Commercial multi-family | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,341
Puerto Rico | Commercial | Commercial multi-family | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,870
Puerto Rico | Commercial | Commercial multi-family | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,793
Weighted average obligor risk rating | units   11.82
Puerto Rico | Commercial | Commercial multi-family | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Puerto Rico | Commercial | Commercial multi-family | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Commercial | Commercial multi-family | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   7,004
Puerto Rico | Commercial | Commercial multi-family | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 140,845
Weighted average obligor risk rating | units   6.02
Puerto Rico | Commercial | CRE non-owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 2,007,333 $ 2,108,218
Puerto Rico | Commercial | CRE non-owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   492,357
Puerto Rico | Commercial | CRE non-owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   166,810
Puerto Rico | Commercial | CRE non-owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 239,448
Weighted average obligor risk rating | units   11.17
Puerto Rico | Commercial | CRE non-owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 3,290
Puerto Rico | Commercial | CRE non-owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Commercial | CRE non-owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   901,905
Puerto Rico | Commercial | CRE non-owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,206,313
Weighted average obligor risk rating | units   6.77
Puerto Rico | Commercial | CRE owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,598,895 $ 1,586,329
Puerto Rico | Commercial | CRE owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   192,895
Puerto Rico | Commercial | CRE owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   184,678
Puerto Rico | Commercial | CRE owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 183,377
Weighted average obligor risk rating | units   11.36
Puerto Rico | Commercial | CRE owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,629
Puerto Rico | Commercial | CRE owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Commercial | CRE owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   562,579
Puerto Rico | Commercial | CRE owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,023,750
Weighted average obligor risk rating | units   7.30
Puerto Rico | Commercial | Commercial and Industrial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 4,229,108 $ 3,418,734
Puerto Rico | Commercial | Commercial and Industrial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   592,861
Puerto Rico | Commercial | Commercial and Industrial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   170,183
Puerto Rico | Commercial | Commercial and Industrial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 130,872
Weighted average obligor risk rating | units   11.26
Puerto Rico | Commercial | Commercial and Industrial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 148
Puerto Rico | Commercial | Commercial and Industrial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   16
Puerto Rico | Commercial | Commercial and Industrial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   894,080
Puerto Rico | Commercial | Commercial and Industrial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 2,524,654
Weighted average obligor risk rating | units   7.20
Puerto Rico | Leasing    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,197,661 $ 1,059,507
Puerto Rico | Leasing | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Leasing | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Leasing | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,590
Puerto Rico | Leasing | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Leasing | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   68
Puerto Rico | Leasing | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,658
Puerto Rico | Leasing | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,055,849
Puerto Rico | Consumer    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,555,377
Puerto Rico | Consumer | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   536
Puerto Rico | Consumer | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11
Puerto Rico | Consumer | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   84,814
Puerto Rico | Consumer | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   425
Puerto Rico | Consumer | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   85,786
Puerto Rico | Consumer | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,469,591
Puerto Rico | Consumer | Credit cards    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 919,935 1,123,800
Puerto Rico | Consumer | Credit cards | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Credit cards | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Credit cards | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,461
Puerto Rico | Consumer | Credit cards | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Credit cards | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Credit cards | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,461
Puerto Rico | Consumer | Credit cards | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,104,339
Puerto Rico | Consumer | Home equity lines of credit    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 4,179 5,038
Puerto Rico | Consumer | Home equity lines of credit | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Home equity lines of credit | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,038
Puerto Rico | Consumer | Personal loans    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,277,747 1,368,150
Puerto Rico | Consumer | Personal loans | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   77
Puerto Rico | Consumer | Personal loans | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Personal loans | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,558
Puerto Rico | Consumer | Personal loans | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Personal loans | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Personal loans | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   19,635
Puerto Rico | Consumer | Personal loans | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,348,515
Puerto Rico | Consumer | Auto Loan    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 3,132,228 2,917,522
Puerto Rico | Consumer | Auto Loan | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Auto Loan | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Auto Loan | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   30,775
Puerto Rico | Consumer | Auto Loan | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Auto Loan | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   372
Puerto Rico | Consumer | Auto Loan | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   31,147
Puerto Rico | Consumer | Auto Loan | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,886,375
Puerto Rico | Consumer | Other    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 126,665 140,867
Puerto Rico | Consumer | Other | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   459
Puerto Rico | Consumer | Other | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11
Puerto Rico | Consumer | Other | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   15,020
Puerto Rico | Consumer | Other | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Puerto Rico | Consumer | Other | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   53
Puerto Rico | Consumer | Other | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   15,543
Puerto Rico | Consumer | Other | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   125,324
Popular U.S.    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 7,811,916 7,226,641
Popular U.S. | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   228,976
Popular U.S. | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   62,872
Popular U.S. | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   204,408
Popular U.S. | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   8,333
Popular U.S. | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   504,589
Popular U.S. | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   6,722,052
Popular U.S. | Construction    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 761,659 693,622
Popular U.S. | Construction | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   46,644
Popular U.S. | Construction | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   17,291
Popular U.S. | Construction | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 44,798
Weighted average obligor risk rating | units   11.00
Popular U.S. | Construction | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Construction | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Construction | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   108,733
Popular U.S. | Construction | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 584,889
Weighted average obligor risk rating | units   7.74
Popular U.S. | Mortgages    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,120,537 $ 1,016,784
Popular U.S. | Mortgages | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Mortgages | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Mortgages | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11,091
Popular U.S. | Mortgages | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Mortgages | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Mortgages | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   11,091
Popular U.S. | Mortgages | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,005,693
Popular U.S. | Legacy    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 15,473 22,105
Popular U.S. | Legacy | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   388
Popular U.S. | Legacy | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   202
Popular U.S. | Legacy | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,528
Weighted average obligor risk rating | units   11.25
Popular U.S. | Legacy | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Legacy | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Legacy | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,118
Popular U.S. | Legacy | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 19,987
Weighted average obligor risk rating | units   7.95
Popular U.S. | Commercial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 5,051,621
Popular U.S. | Commercial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   181,944
Popular U.S. | Commercial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   45,379
Popular U.S. | Commercial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 143,303
Weighted average obligor risk rating | units   11.02
Popular U.S. | Commercial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Commercial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Commercial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   370,626
Popular U.S. | Commercial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 4,680,995
Weighted average obligor risk rating | units   7.04
Popular U.S. | Commercial | Commercial multi-family    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,743,711 $ 1,647,310
Popular U.S. | Commercial | Commercial multi-family | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   48,359
Popular U.S. | Commercial | Commercial multi-family | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   13,827
Popular U.S. | Commercial | Commercial multi-family | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 8,433
Weighted average obligor risk rating | units   11.25
Popular U.S. | Commercial | Commercial multi-family | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Commercial | Commercial multi-family | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Commercial | Commercial multi-family | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   70,619
Popular U.S. | Commercial | Commercial multi-family | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,576,691
Weighted average obligor risk rating | units   7.37
Popular U.S. | Commercial | CRE non-owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,993,810 $ 1,870,296
Popular U.S. | Commercial | CRE non-owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   80,608
Popular U.S. | Commercial | CRE non-owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   24,383
Popular U.S. | Commercial | CRE non-owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 100,658
Weighted average obligor risk rating | units   11.00
Popular U.S. | Commercial | CRE non-owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Commercial | CRE non-owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Commercial | CRE non-owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   205,649
Popular U.S. | Commercial | CRE non-owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,664,647
Weighted average obligor risk rating | units   6.94
Popular U.S. | Commercial | CRE owner occupied    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 344,380 $ 339,135
Popular U.S. | Commercial | CRE owner occupied | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   27,298
Popular U.S. | Commercial | CRE owner occupied | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   5,709
Popular U.S. | Commercial | CRE owner occupied | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 13,826
Weighted average obligor risk rating | units   11.02
Popular U.S. | Commercial | CRE owner occupied | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Commercial | CRE owner occupied | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Commercial | CRE owner occupied | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   46,833
Popular U.S. | Commercial | CRE owner occupied | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 292,302
Weighted average obligor risk rating | units   7.48
Popular U.S. | Commercial | Commercial and Industrial    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 1,536,763 $ 1,194,880
Popular U.S. | Commercial | Commercial and Industrial | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   25,679
Popular U.S. | Commercial | Commercial and Industrial | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,460
Popular U.S. | Commercial | Commercial and Industrial | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 20,386
Weighted average obligor risk rating | units   11.01
Popular U.S. | Commercial | Commercial and Industrial | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 0
Popular U.S. | Commercial | Commercial and Industrial | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Commercial | Commercial and Industrial | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   47,525
Popular U.S. | Commercial | Commercial and Industrial | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 1,147,355
Weighted average obligor risk rating | units   6.63
Popular U.S. | Consumer    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 442,509
Popular U.S. | Consumer | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   3,688
Popular U.S. | Consumer | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   8,333
Popular U.S. | Consumer | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   12,021
Popular U.S. | Consumer | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   430,488
Popular U.S. | Consumer | Credit cards    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 31 36
Popular U.S. | Consumer | Credit cards | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Credit cards | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   36
Popular U.S. | Consumer | Home equity lines of credit    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 94,571 117,343
Popular U.S. | Consumer | Home equity lines of credit | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Home equity lines of credit | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Home equity lines of credit | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,024
Popular U.S. | Consumer | Home equity lines of credit | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Home equity lines of credit | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   7,930
Popular U.S. | Consumer | Home equity lines of credit | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   9,954
Popular U.S. | Consumer | Home equity lines of credit | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   107,389
Popular U.S. | Consumer | Personal loans    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income 199,238 324,440
Popular U.S. | Consumer | Personal loans | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Personal loans | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Personal loans | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   1,664
Popular U.S. | Consumer | Personal loans | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Personal loans | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   403
Popular U.S. | Consumer | Personal loans | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   2,067
Popular U.S. | Consumer | Personal loans | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   322,373
Popular U.S. | Consumer | Other    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income $ 1,743 690
Popular U.S. | Consumer | Other | Watch    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Special Mention    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Substandard    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Doubtful    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Loss    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Sub-total    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   0
Popular U.S. | Consumer | Other | Pass    
Financing Receivable, Recorded Investment    
Loans held-in-portfolio, net of unearned income   $ 690