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Disclosures related to loans individually evaluated for impairment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Financing Receivable, Impaired [Line Items]    
Recorded Investment $ 1,390,485 $ 1,302,819
Impaired Financing Receivable Unpaid Principal Balance 1,613,961 1,537,044
Related Allowance 122,718 86,072
Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 120,510 76,798
Impaired Financing Receivable Unpaid Principal Balance 120,510 76,798
Related Allowance 15,294 27,086
Impaired Financing Receivables With No Related Allowance [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 561,066 594,073
Impaired Financing Receivable Unpaid Principal Balance 732,625 800,681
Impaired Financing Receivables With No Related Allowance [Member] | Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 59,426 1,000
Impaired Financing Receivable Unpaid Principal Balance 59,426 1,000
PUERTO RICO
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 1,204,770 1,006,666
Impaired Financing Receivable Unpaid Principal Balance 1,375,063 1,172,295
Related Allowance 106,302 70,434
PUERTO RICO | Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 120,510 76,798
Impaired Financing Receivable Unpaid Principal Balance 120,510 76,798
Related Allowance 15,294 27,086
PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 428,706 355,964
Impaired Financing Receivable Unpaid Principal Balance 547,807 494,305
PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 59,426 1,000
Impaired Financing Receivable Unpaid Principal Balance 59,426 1,000
Impaired Financing Receivables With Related Allowance [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 829,419 708,746
Impaired Financing Receivable Unpaid Principal Balance 881,336 736,363
Related Allowance 122,718 86,072
Impaired Financing Receivables With Related Allowance [Member] | Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 61,084 75,798
Impaired Financing Receivable Unpaid Principal Balance 61,084 75,798
Related Allowance 15,294 27,086
Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 776,064 650,702
Impaired Financing Receivable Unpaid Principal Balance 827,256 677,990
Related Allowance 106,302 70,434
Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Covered Under Loss Sharing Agreements With F D I C [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 61,084 75,798
Impaired Financing Receivable Unpaid Principal Balance 61,084 75,798
Related Allowance 15,294 27,086
Non Covered Loans [Member] | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 26,692 31,324
Impaired Financing Receivable Unpaid Principal Balance 34,465 44,178
Related Allowance 0 575
Non Covered Loans [Member] | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 125,708 113,843
Impaired Financing Receivable Unpaid Principal Balance 159,298 139,689
Related Allowance 2,115 1,050
Non Covered Loans [Member] | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 221,477 250,921
Impaired Financing Receivable Unpaid Principal Balance 290,708 319,562
Related Allowance 12,650 3,212
Non Covered Loans [Member] | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 123,347 160,241
Impaired Financing Receivable Unpaid Principal Balance 164,632 200,664
Related Allowance 7,474 6,901
Non Covered Loans [Member] | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 47,897 91,710
Impaired Financing Receivable Unpaid Principal Balance 85,840 148,162
Related Allowance 191 289
Non Covered Loans [Member] | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 560,441 382,880
Impaired Financing Receivable Unpaid Principal Balance 580,403 386,545
Related Allowance 62,823 29,063
Non Covered Loans [Member] | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,276 48,890
Impaired Financing Receivable Unpaid Principal Balance 37,968 75,234
Related Allowance 0 57
Non Covered Loans [Member] | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 4,933 6,104
Impaired Financing Receivable Unpaid Principal Balance 4,933 6,104
Related Allowance 978 793
Non Covered Loans [Member] | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 39,347 38,874
Impaired Financing Receivable Unpaid Principal Balance 39,347 38,874
Related Allowance 1,674 2,151
Non Covered Loans [Member] | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 202 0
Impaired Financing Receivable Unpaid Principal Balance 202 0
Related Allowance 13 0
Non Covered Loans [Member] | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 92,379 93,760
Impaired Financing Receivable Unpaid Principal Balance 92,379 93,760
Related Allowance 19,348 14,115
Non Covered Loans [Member] | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 424 93
Impaired Financing Receivable Unpaid Principal Balance 424 93
Related Allowance 43 6
Non Covered Loans [Member] | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 2,852 7,381
Impaired Financing Receivable Unpaid Principal Balance 2,852 7,381
Related Allowance 115 774
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 26,692 20,861
Impaired Financing Receivable Unpaid Principal Balance 34,465 33,715
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 113,734 106,628
Impaired Financing Receivable Unpaid Principal Balance 144,905 131,377
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 159,685 212,148
Impaired Financing Receivable Unpaid Principal Balance 207,390 271,517
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 89,025 110,557
Impaired Financing Receivable Unpaid Principal Balance 120,881 138,094
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 46,280 90,038
Impaired Financing Receivable Unpaid Principal Balance 83,128 145,793
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 41,948 9,964
Impaired Financing Receivable Unpaid Principal Balance 44,462 9,964
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,276 42,877
Impaired Financing Receivable Unpaid Principal Balance 37,968 69,221
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 20,725 22,669
Impaired Financing Receivable Unpaid Principal Balance 25,528 31,775
Related Allowance 0 575
Non Covered Loans [Member] | PUERTO RICO | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 69,527 51,426
Impaired Financing Receivable Unpaid Principal Balance 77,213 54,445
Related Allowance 1,122 836
Non Covered Loans [Member] | PUERTO RICO | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 196,798 203,279
Impaired Financing Receivable Unpaid Principal Balance 260,078 262,094
Related Allowance 12,650 2,757
Non Covered Loans [Member] | PUERTO RICO | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 117,325 125,715
Impaired Financing Receivable Unpaid Principal Balance 156,642 163,404
Related Allowance 7,474 6,239
Non Covered Loans [Member] | PUERTO RICO | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 35,757 49,747
Impaired Financing Receivable Unpaid Principal Balance 71,760 103,411
Related Allowance 191 289
Non Covered Loans [Member] | PUERTO RICO | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 506,723 333,346
Impaired Financing Receivable Unpaid Principal Balance 525,927 336,682
Related Allowance 47,523 14,944
Non Covered Loans [Member] | PUERTO RICO | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 4,933 6,104
Impaired Financing Receivable Unpaid Principal Balance 4,933 6,104
Related Allowance 978 793
Non Covered Loans [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 39,347 38,874
Impaired Financing Receivable Unpaid Principal Balance 39,347 38,874
Related Allowance 1,674 2,151
Non Covered Loans [Member] | PUERTO RICO | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | PUERTO RICO | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 92,379 93,760
Impaired Financing Receivable Unpaid Principal Balance 92,379 93,760
Related Allowance 19,348 14,115
Non Covered Loans [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 333 0
Impaired Financing Receivable Unpaid Principal Balance 333 0
Related Allowance 34 0
Non Covered Loans [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 413 4,948
Impaired Financing Receivable Unpaid Principal Balance 413 4,948
Related Allowance 14 649
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 20,725 12,206
Impaired Financing Receivable Unpaid Principal Balance 25,528 21,312
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 59,469 45,517
Impaired Financing Receivable Unpaid Principal Balance 64,736 47,439
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 135,006 165,745
Impaired Financing Receivable Unpaid Principal Balance 176,760 215,288
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 83,003 83,421
Impaired Financing Receivable Unpaid Principal Balance 112,891 108,224
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 34,140 48,075
Impaired Financing Receivable Unpaid Principal Balance 69,048 101,042
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 36,937 0
Impaired Financing Receivable Unpaid Principal Balance 39,418 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | PUERTO RICO | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 185,715 296,153
Impaired Financing Receivable Unpaid Principal Balance 238,898 364,749
Related Allowance 16,416 15,638
Non Covered Loans [Member] | UNITED STATES | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 5,967 8,655
Impaired Financing Receivable Unpaid Principal Balance 8,937 12,403
Related Allowance 0 0
Non Covered Loans [Member] | UNITED STATES | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 56,181 62,417
Impaired Financing Receivable Unpaid Principal Balance 82,085 85,244
Related Allowance 993 214
Non Covered Loans [Member] | UNITED STATES | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,679 47,642
Impaired Financing Receivable Unpaid Principal Balance 30,630 57,468
Related Allowance 0 455
Non Covered Loans [Member] | UNITED STATES | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 6,022 34,526
Impaired Financing Receivable Unpaid Principal Balance 7,990 37,260
Related Allowance 0 662
Non Covered Loans [Member] | UNITED STATES | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 12,140 41,963
Impaired Financing Receivable Unpaid Principal Balance 14,080 44,751
Related Allowance 0 0
Non Covered Loans [Member] | UNITED STATES | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 53,718 49,534
Impaired Financing Receivable Unpaid Principal Balance 54,476 49,863
Related Allowance 15,300 14,119
Non Covered Loans [Member] | UNITED STATES | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,276 48,890
Impaired Financing Receivable Unpaid Principal Balance 37,968 75,234
Related Allowance 0 57
Non Covered Loans [Member] | UNITED STATES | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | UNITED STATES | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 202 0
Impaired Financing Receivable Unpaid Principal Balance 202 0
Related Allowance 13 0
Non Covered Loans [Member] | UNITED STATES | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 91 93
Impaired Financing Receivable Unpaid Principal Balance 91 93
Related Allowance 9 6
Non Covered Loans [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 2,439 2,433
Impaired Financing Receivable Unpaid Principal Balance 2,439 2,433
Related Allowance 101 125
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 132,360 238,109
Impaired Financing Receivable Unpaid Principal Balance 184,818 306,376
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 5,967 8,655
Impaired Financing Receivable Unpaid Principal Balance 8,937 12,403
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 54,265 61,111
Impaired Financing Receivable Unpaid Principal Balance 80,169 83,938
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,679 46,403
Impaired Financing Receivable Unpaid Principal Balance 30,630 56,229
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 6,022 27,136
Impaired Financing Receivable Unpaid Principal Balance 7,990 29,870
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 12,140 41,963
Impaired Financing Receivable Unpaid Principal Balance 14,080 44,751
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 5,011 9,964
Impaired Financing Receivable Unpaid Principal Balance 5,044 9,964
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 24,276 42,877
Impaired Financing Receivable Unpaid Principal Balance 37,968 69,221
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | UNITED STATES | Impaired Financing Receivables With No Related Allowance [Member] | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 10,463
Impaired Financing Receivable Unpaid Principal Balance 0 10,463
Related Allowance 0 575
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 11,974 7,215
Impaired Financing Receivable Unpaid Principal Balance 14,393 8,312
Related Allowance 2,115 1,050
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 61,792 38,773
Impaired Financing Receivable Unpaid Principal Balance 83,318 48,045
Related Allowance 12,650 3,212
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 34,322 49,684
Impaired Financing Receivable Unpaid Principal Balance 43,751 62,570
Related Allowance 7,474 6,901
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 1,617 1,672
Impaired Financing Receivable Unpaid Principal Balance 2,712 2,369
Related Allowance 191 289
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 518,493 372,916
Impaired Financing Receivable Unpaid Principal Balance 535,941 376,581
Related Allowance 62,823 29,063
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 6,013
Impaired Financing Receivable Unpaid Principal Balance 0 6,013
Related Allowance 0 57
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 4,933 6,104
Impaired Financing Receivable Unpaid Principal Balance 4,933 6,104
Related Allowance 978 793
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 39,347 38,874
Impaired Financing Receivable Unpaid Principal Balance 39,347 38,874
Related Allowance 1,674 2,151
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 202 0
Impaired Financing Receivable Unpaid Principal Balance 202 0
Related Allowance 13 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 92,379 93,760
Impaired Financing Receivable Unpaid Principal Balance 92,379 93,760
Related Allowance 19,348 14,115
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 424 93
Impaired Financing Receivable Unpaid Principal Balance 424 93
Related Allowance 43 6
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 2,852 7,381
Impaired Financing Receivable Unpaid Principal Balance 2,852 7,381
Related Allowance 115 774
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 10,463
Impaired Financing Receivable Unpaid Principal Balance 0 10,463
Related Allowance 0 575
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 10,058 5,909
Impaired Financing Receivable Unpaid Principal Balance 12,477 7,006
Related Allowance 1,122 836
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 61,792 37,534
Impaired Financing Receivable Unpaid Principal Balance 83,318 46,806
Related Allowance 12,650 2,757
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 34,322 42,294
Impaired Financing Receivable Unpaid Principal Balance 43,751 55,180
Related Allowance 7,474 6,239
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 1,617 1,672
Impaired Financing Receivable Unpaid Principal Balance 2,712 2,369
Related Allowance 191 289
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 469,786 333,346
Impaired Financing Receivable Unpaid Principal Balance 486,509 336,682
Related Allowance 47,523 14,944
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 4,933 6,104
Impaired Financing Receivable Unpaid Principal Balance 4,933 6,104
Related Allowance 978 793
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 39,347 38,874
Impaired Financing Receivable Unpaid Principal Balance 39,347 38,874
Related Allowance 1,674 2,151
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 92,379 93,760
Impaired Financing Receivable Unpaid Principal Balance 92,379 93,760
Related Allowance 19,348 14,115
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 333 0
Impaired Financing Receivable Unpaid Principal Balance 333 0
Related Allowance 34 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | PUERTO RICO | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 413 4,948
Impaired Financing Receivable Unpaid Principal Balance 413 4,948
Related Allowance 14 649
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 53,355 58,044
Impaired Financing Receivable Unpaid Principal Balance 54,080 58,373
Related Allowance 16,416 15,638
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Commercial Multi Family [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Commercial Real Estate Non Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 1,916 1,306
Impaired Financing Receivable Unpaid Principal Balance 1,916 1,306
Related Allowance 993 214
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Commercial Real Estate Owner Occupied [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 1,239
Impaired Financing Receivable Unpaid Principal Balance 0 1,239
Related Allowance 0 455
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Commercial And Industrial Loans [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 7,390
Impaired Financing Receivable Unpaid Principal Balance 0 7,390
Related Allowance 0 662
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Commercial Real Estate Construction Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Mortgages
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 48,707 39,570
Impaired Financing Receivable Unpaid Principal Balance 49,432 39,899
Related Allowance 15,300 14,119
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Legacy [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 6,013
Impaired Financing Receivable Unpaid Principal Balance 0 6,013
Related Allowance 0 57
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Finance Leases Portfolio Segment Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Credit Card Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Consumer Loan [Member] | Home Equity Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 202 0
Impaired Financing Receivable Unpaid Principal Balance 202 0
Related Allowance 13 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Consumer Loan [Member] | Personal [Member]
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 0 0
Impaired Financing Receivable Unpaid Principal Balance 0 0
Related Allowance 0 0
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Loans Auto Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 91 93
Impaired Financing Receivable Unpaid Principal Balance 91 93
Related Allowance 9 6
Non Covered Loans [Member] | Impaired Financing Receivables With Related Allowance [Member] | UNITED STATES | Consumer Loan [Member] | Consumer Other Financing Receivable Member
    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 2,439 2,433
Impaired Financing Receivable Unpaid Principal Balance 2,439 2,433
Related Allowance $ 101 $ 125