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LOANS HELD FOR INVESTMENT - Corporation's Residential Mortgage Loans By Origination Year Based on Accrual Status (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Recorded Investment [Line Items]          
Loans held for investment $ 12,446,024   $ 12,446,024   $ 12,185,483
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 29,045 $ 20,259 84,798 $ 62,260  
Puerto Rico and Virgin Islands regions [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Loans held for investment 10,277,735   10,277,735   10,163,222
Florida region [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Loans held for investment 2,168,289   2,168,289   2,022,261
Residential Portfolio Segment [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 198,361   198,361    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 255,072   255,072    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 230,703   230,703    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 107,356   107,356    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 55,776   55,776    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,972,879   1,972,879    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,820,147   2,820,147   2,821,726
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff     2    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff     9    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff     1,417    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 421 $ 499 1,428 $ 2,628  
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 198,361   198,361    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 255,072   255,072    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 229,579   229,579    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 107,356   107,356    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 55,776   55,776    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,942,274   1,942,274    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,788,418   2,788,418   2,789,487
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,124   1,124    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 30,605   30,605    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 31,729   31,729   32,239
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 132,452   132,452    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 168,629   168,629    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 156,018   156,018    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 65,377   65,377    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 28,449   28,449    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,776,753   1,776,753    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,327,678   2,327,678   2,356,006
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff     2    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff     9    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff     1,417    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff     1,428    
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 132,452   132,452    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 168,629   168,629    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 155,950   155,950    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 65,377   65,377    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 28,449   28,449    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,754,340   1,754,340    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,305,197   2,305,197   2,330,994
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 68   68    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 22,413   22,413    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 22,481   22,481   25,012
Residential Portfolio Segment [Member] | Florida region [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 65,909   65,909    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 86,443   86,443    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 74,685   74,685    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 41,979   41,979    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,327   27,327    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 196,126   196,126    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 492,469   492,469   465,720
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff     0    
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff     0    
Residential Portfolio Segment [Member] | Florida region [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 65,909   65,909    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 86,443   86,443    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 73,629   73,629    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 41,979   41,979    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,327   27,327    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 187,934   187,934    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 483,221   483,221   458,493
Residential Portfolio Segment [Member] | Florida region [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,056   1,056    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 8,192   8,192    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 9,248   9,248   7,227
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 765   765    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 781   781    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 1,278   1,278    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 782   782    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 90,851   90,851    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 94,457   94,457   100,236
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 765   765    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 781   781    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 1,278   1,278    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 782   782    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 90,851   90,851    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 94,457   94,457   100,236
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 0   0   0
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Puerto Rico and Virgin Islands regions [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 765   765    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 781   781    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 1,278   1,278    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 782   782    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 90,167   90,167    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 93,773   93,773   99,293
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Puerto Rico and Virgin Islands regions [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 765   765    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 781   781    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 1,278   1,278    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 782   782    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 90,167   90,167    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 93,773   93,773   99,293
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Puerto Rico and Virgin Islands regions [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 0   0   0
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Florida region [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 684   684    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 684   684   943
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Florida region [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 684   684    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 684   684   943
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Florida region [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 0   0   0
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 198,361   198,361    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 254,307   254,307    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 229,922   229,922    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 106,078   106,078    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 54,994   54,994    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,882,028   1,882,028    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,725,690   2,725,690   2,721,490
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 198,361   198,361    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 254,307   254,307    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 228,798   228,798    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 106,078   106,078    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 54,994   54,994    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,851,423   1,851,423    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,693,961   2,693,961   2,689,251
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,124   1,124    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 30,605   30,605    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 31,729   31,729   32,239
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Puerto Rico and Virgin Islands regions [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 132,452   132,452    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 167,864   167,864    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 155,237   155,237    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 64,099   64,099    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,667   27,667    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,686,586   1,686,586    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,233,905   2,233,905   2,256,713
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Puerto Rico and Virgin Islands regions [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 132,452   132,452    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 167,864   167,864    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 155,169   155,169    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 64,099   64,099    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,667   27,667    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 1,664,173   1,664,173    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 2,211,424   2,211,424   2,231,701
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Puerto Rico and Virgin Islands regions [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 68   68    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 22,413   22,413    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 22,481   22,481   25,012
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 65,909   65,909    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 86,443   86,443    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 74,685   74,685    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 41,979   41,979    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,327   27,327    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 195,442   195,442    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 491,785   491,785   464,777
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member] | Performing Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 65,909   65,909    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 86,443   86,443    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 73,629   73,629    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 41,979   41,979    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 27,327   27,327    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 187,250   187,250    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment 482,537   482,537   457,550
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member] | Nonperforming Financial Instruments [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 1,056   1,056    
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 0   0    
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 8,192   8,192    
Financing Receivable, Excluding Accrued Interest, Revolving 0   0    
Loans held for investment $ 9,248   $ 9,248   $ 7,227