LOANS HELD FOR INVESTMENT - Corporation's Commercial and Construction Loans by Portfolio Classes and by Origination Year Based on the Internal Credit Risk Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 11,140,582	$ 11,777,289
Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	9,150,483	9,788,106
Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,990,099	1,989,183
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	441,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	379,510
Financing Receivable, Originated Two Years before Latest Fiscal Year	674,479
Financing Receivable, Originated Three Years before Latest Fiscal Year	305,768
Financing Receivable, Originated Four Years before Latest Fiscal Year	247,622
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	314,073
Financing Receivable, Revolving	569,849
Financing Receivable, before Allowance for Credit Loss	2,932,712	3,202,590
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	241,097
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	226,761
Financing Receivable, Originated Two Years before Latest Fiscal Year	372,279
Financing Receivable, Originated Three Years before Latest Fiscal Year	210,360
Financing Receivable, Originated Four Years before Latest Fiscal Year	182,630
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	272,338
Financing Receivable, Revolving	456,086
Financing Receivable, before Allowance for Credit Loss	1,961,551	2,264,731
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	200,314
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	152,749
Financing Receivable, Originated Two Years before Latest Fiscal Year	302,200
Financing Receivable, Originated Three Years before Latest Fiscal Year	95,408
Financing Receivable, Originated Four Years before Latest Fiscal Year	64,992
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	41,735
Financing Receivable, Revolving	113,763
Financing Receivable, before Allowance for Credit Loss	971,161	937,859
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	440,115
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	350,574
Financing Receivable, Originated Two Years before Latest Fiscal Year	597,171
Financing Receivable, Originated Three Years before Latest Fiscal Year	291,323
Financing Receivable, Originated Four Years before Latest Fiscal Year	229,775
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	256,011
Financing Receivable, Revolving	525,611
Financing Receivable, before Allowance for Credit Loss	2,690,580	2,978,350
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Pass [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	239,801
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	225,254
Financing Receivable, Originated Two Years before Latest Fiscal Year	356,671
Financing Receivable, Originated Three Years before Latest Fiscal Year	207,988
Financing Receivable, Originated Four Years before Latest Fiscal Year	164,783
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	223,753
Financing Receivable, Revolving	430,148
Financing Receivable, before Allowance for Credit Loss	1,848,398	2,155,226
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Pass [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	200,314
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	125,320
Financing Receivable, Originated Two Years before Latest Fiscal Year	240,500
Financing Receivable, Originated Three Years before Latest Fiscal Year	83,335
Financing Receivable, Originated Four Years before Latest Fiscal Year	64,992
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,258
Financing Receivable, Revolving	95,463
Financing Receivable, before Allowance for Credit Loss	842,182	823,124
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	28,130
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	25,193
Financing Receivable, Revolving	25,983
Financing Receivable, before Allowance for Credit Loss	79,306	133,395
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Special Mention [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	924
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	20,423
Financing Receivable, Revolving	8,018
Financing Receivable, before Allowance for Credit Loss	29,365	59,421
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Special Mention [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	27,206
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,770
Financing Receivable, Revolving	17,965
Financing Receivable, before Allowance for Credit Loss	49,941	73,974
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,296
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28,936
Financing Receivable, Originated Two Years before Latest Fiscal Year	49,178
Financing Receivable, Originated Three Years before Latest Fiscal Year	14,445
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,847
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,869
Financing Receivable, Revolving	18,255
Financing Receivable, before Allowance for Credit Loss	162,826	90,845
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Substandard [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,296
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,507
Financing Receivable, Originated Two Years before Latest Fiscal Year	14,684
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,372
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,847
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	28,162
Financing Receivable, Revolving	17,920
Financing Receivable, before Allowance for Credit Loss	83,788	50,084
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Substandard [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	27,429
Financing Receivable, Originated Two Years before Latest Fiscal Year	34,494
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,073
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,707
Financing Receivable, Revolving	335
Financing Receivable, before Allowance for Credit Loss	79,038	40,761
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Doubtful [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Doubtful [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Loss [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member] \| Loss [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	203,978
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	436,071
Financing Receivable, Originated Two Years before Latest Fiscal Year	404,025
Financing Receivable, Originated Three Years before Latest Fiscal Year	315,290
Financing Receivable, Originated Four Years before Latest Fiscal Year	240,742
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	512,443
Financing Receivable, Revolving	23,953
Financing Receivable, before Allowance for Credit Loss	2,136,502	2,230,602
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	130,468
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	379,211
Financing Receivable, Originated Two Years before Latest Fiscal Year	308,486
Financing Receivable, Originated Three Years before Latest Fiscal Year	246,391
Financing Receivable, Originated Four Years before Latest Fiscal Year	197,169
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	447,531
Financing Receivable, Revolving	42
Financing Receivable, before Allowance for Credit Loss	1,709,298	1,853,224
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	73,510
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	56,860
Financing Receivable, Originated Two Years before Latest Fiscal Year	95,539
Financing Receivable, Originated Three Years before Latest Fiscal Year	68,899
Financing Receivable, Originated Four Years before Latest Fiscal Year	43,573
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	64,912
Financing Receivable, Revolving	23,911
Financing Receivable, before Allowance for Credit Loss	427,204	377,378
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	202,127
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	408,588
Financing Receivable, Originated Two Years before Latest Fiscal Year	290,943
Financing Receivable, Originated Three Years before Latest Fiscal Year	287,641
Financing Receivable, Originated Four Years before Latest Fiscal Year	113,922
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	416,888
Financing Receivable, Revolving	21,686
Financing Receivable, before Allowance for Credit Loss	1,741,795	1,803,454
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Pass [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	128,617
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	368,540
Financing Receivable, Originated Two Years before Latest Fiscal Year	217,763
Financing Receivable, Originated Three Years before Latest Fiscal Year	225,524
Financing Receivable, Originated Four Years before Latest Fiscal Year	75,701
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	380,192
Financing Receivable, Revolving	42
Financing Receivable, before Allowance for Credit Loss	1,396,379	1,511,827
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Pass [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	73,510
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,048
Financing Receivable, Originated Two Years before Latest Fiscal Year	73,180
Financing Receivable, Originated Three Years before Latest Fiscal Year	62,117
Financing Receivable, Originated Four Years before Latest Fiscal Year	38,221
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,696
Financing Receivable, Revolving	21,644
Financing Receivable, before Allowance for Credit Loss	345,416	291,627
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	27,483
Financing Receivable, Originated Two Years before Latest Fiscal Year	113,082
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,782
Financing Receivable, Originated Four Years before Latest Fiscal Year	124,607
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	49,365
Financing Receivable, Revolving	2,267
Financing Receivable, before Allowance for Credit Loss	323,586	378,163
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Special Mention [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10,671
Financing Receivable, Originated Two Years before Latest Fiscal Year	90,723
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	119,255
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	21,467
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	242,116	292,736
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Special Mention [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,812
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,359
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,782
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,352
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	27,898
Financing Receivable, Revolving	2,267
Financing Receivable, before Allowance for Credit Loss	81,470	85,427
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,851
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	20,867
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,213
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	46,190
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	71,121	48,985
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Substandard [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,851
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	20,867
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,213
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	45,872
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	70,803	48,661
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Substandard [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	318
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	318	324
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Doubtful [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Doubtful [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Loss [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member] \| Loss [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	13,596
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	86,612
Financing Receivable, Originated Two Years before Latest Fiscal Year	19,706
Financing Receivable, Originated Three Years before Latest Fiscal Year	41,393
Financing Receivable, Originated Four Years before Latest Fiscal Year	197
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,704
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	170,208	212,500
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,656
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,334
Financing Receivable, Originated Two Years before Latest Fiscal Year	16,086
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,160
Financing Receivable, Originated Four Years before Latest Fiscal Year	197
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,704
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	50,137	85,016
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	11,940
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	69,278
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,620
Financing Receivable, Originated Three Years before Latest Fiscal Year	35,233
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	120,071	127,484
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	13,596
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	86,612
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,938
Financing Receivable, Originated Three Years before Latest Fiscal Year	36,860
Financing Receivable, Originated Four Years before Latest Fiscal Year	197
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,906
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	161,109	196,320
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Pass [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,656
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,334
Financing Receivable, Originated Two Years before Latest Fiscal Year	15,318
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,627
Financing Receivable, Originated Four Years before Latest Fiscal Year	197
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,906
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	41,038	68,836
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Pass [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	11,940
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	69,278
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,620
Financing Receivable, Originated Three Years before Latest Fiscal Year	35,233
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	120,071	127,484
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	768
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	768	776
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Special Mention [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	768
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	768	776
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Special Mention [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,533
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,798
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	8,331	15,404
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Substandard [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,533
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,798
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	8,331	15,404
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Substandard [Member] \| Florida region [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, before Allowance for Credit Loss	0	0
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Doubtful [Member] \| Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Credit Quality Indicator [Line Items]

LOANS HELD FOR INVESTMENT - Corporation's Commercial and Construction Loans by Portfolio Classes and by Origination Year Based on the Internal Credit Risk Category (Detail) - USD ($)
$ in Thousands