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LOANS HELD FOR INVESTMENT - Corporation's Residential Mortgage Loans By Origination Year Based on Accrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 11,097,705	$ 11,060,658
Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	9,155,295	9,113,918
Puerto Rico and Virgin Islands regions [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment		117,500
Florida region [Member}
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,942,410	1,946,740
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	42,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131,722
Financing Receivable, Originated Two Years before Latest Fiscal Year	68,936
Financing Receivable, Originated Three Years before Latest Fiscal Year	92,782
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,604
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,425,108
Financing Receivable, Revolving	0
Loans held for investment	2,891,699	2,978,895
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	42,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131,687
Financing Receivable, Originated Two Years before Latest Fiscal Year	68,936
Financing Receivable, Originated Three Years before Latest Fiscal Year	92,377
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,325
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,377,009
Financing Receivable, Revolving	0
Loans held for investment	2,842,881	2,923,768
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	405
Financing Receivable, Originated Four Years before Latest Fiscal Year	279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	48,099
Financing Receivable, Revolving	0
Loans held for investment	48,818	55,127
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	33,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	79,213
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,758
Financing Receivable, Originated Three Years before Latest Fiscal Year	56,754
Financing Receivable, Originated Four Years before Latest Fiscal Year	84,834
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,199,286
Financing Receivable, Revolving	0
Loans held for investment	2,487,093	2,549,573
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	33,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	79,178
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,758
Financing Receivable, Originated Three Years before Latest Fiscal Year	56,641
Financing Receivable, Originated Four Years before Latest Fiscal Year	84,555
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,156,514
Financing Receivable, Revolving	0
Loans held for investment	2,443,894	2,501,598
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	113
Financing Receivable, Originated Four Years before Latest Fiscal Year	279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	42,772
Financing Receivable, Revolving	0
Loans held for investment	43,199	47,975
Residential Portfolio Segment [Member] | Florida region [Member}
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	9,299
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,509
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,178
Financing Receivable, Originated Three Years before Latest Fiscal Year	36,028
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,770
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	225,822
Financing Receivable, Revolving	0
Loans held for investment	404,606	429,322
Residential Portfolio Segment [Member] | Florida region [Member} | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	9,299
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,509
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,178
Financing Receivable, Originated Three Years before Latest Fiscal Year	35,736
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,770
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	220,495
Financing Receivable, Revolving	0
Loans held for investment	398,987	422,170
Residential Portfolio Segment [Member] | Florida region [Member} | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [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	292
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,327
Financing Receivable, Revolving	0
Loans held for investment	5,619	7,152
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	183
Financing Receivable, Originated Two Years before Latest Fiscal Year	567
Financing Receivable, Originated Three Years before Latest Fiscal Year	959
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,286
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	117,015
Financing Receivable, Revolving	0
Loans held for investment	121,010	125,392
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	183
Financing Receivable, Originated Two Years before Latest Fiscal Year	567
Financing Receivable, Originated Three Years before Latest Fiscal Year	959
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,286
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	117,015
Financing Receivable, Revolving	0
Loans held for investment	121,010	125,392
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [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
Loans held for investment	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, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	183
Financing Receivable, Originated Two Years before Latest Fiscal Year	567
Financing Receivable, Originated Three Years before Latest Fiscal Year	959
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,286
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	116,279
Financing Receivable, Revolving	0
Loans held for investment	120,274	124,652
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, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	183
Financing Receivable, Originated Two Years before Latest Fiscal Year	567
Financing Receivable, Originated Three Years before Latest Fiscal Year	959
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,286
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	116,279
Financing Receivable, Revolving	0
Loans held for investment	120,274	124,652
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, 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
Loans held for investment	0	0
Residential Portfolio Segment [Member] | FHA/VA government-guaranteed loans [Member] | Florida region [Member}
Financing Receivable, Recorded Investment [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	736
Financing Receivable, Revolving	0
Loans held for investment	736	740
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, 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	736
Financing Receivable, Revolving	0
Loans held for investment	736	740
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, 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
Loans held for investment	0	0
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	42,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131,539
Financing Receivable, Originated Two Years before Latest Fiscal Year	68,369
Financing Receivable, Originated Three Years before Latest Fiscal Year	91,823
Financing Receivable, Originated Four Years before Latest Fiscal Year	128,318
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,308,093
Financing Receivable, Revolving	0
Loans held for investment	2,770,689	2,853,503
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	42,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131,504
Financing Receivable, Originated Two Years before Latest Fiscal Year	68,369
Financing Receivable, Originated Three Years before Latest Fiscal Year	91,418
Financing Receivable, Originated Four Years before Latest Fiscal Year	128,039
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,259,994
Financing Receivable, Revolving	0
Loans held for investment	2,721,871	2,798,376
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	405
Financing Receivable, Originated Four Years before Latest Fiscal Year	279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	48,099
Financing Receivable, Revolving	0
Loans held for investment	48,818	55,127
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Puerto Rico and Virgin Islands regions [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	33,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	79,030
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,191
Financing Receivable, Originated Three Years before Latest Fiscal Year	55,795
Financing Receivable, Originated Four Years before Latest Fiscal Year	82,548
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,083,007
Financing Receivable, Revolving	0
Loans held for investment	2,366,819	2,424,921
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, Originated in Current Fiscal Year	33,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	78,995
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,191
Financing Receivable, Originated Three Years before Latest Fiscal Year	55,682
Financing Receivable, Originated Four Years before Latest Fiscal Year	82,269
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,040,235
Financing Receivable, Revolving	0
Loans held for investment	2,323,620	2,376,946
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, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	113
Financing Receivable, Originated Four Years before Latest Fiscal Year	279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	42,772
Financing Receivable, Revolving	0
Loans held for investment	43,199	47,975
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member}
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	9,299
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,509
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,178
Financing Receivable, Originated Three Years before Latest Fiscal Year	36,028
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,770
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	225,086
Financing Receivable, Revolving	0
Loans held for investment	403,870	428,582
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member} | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	9,299
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,509
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,178
Financing Receivable, Originated Three Years before Latest Fiscal Year	35,736
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,770
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	219,759
Financing Receivable, Revolving	0
Loans held for investment	398,251	421,430
Residential Portfolio Segment [Member] | Conventional residential mortgage loans [Member] | Florida region [Member} | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [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	292
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,327
Financing Receivable, Revolving	0
Loans held for investment	$ 5,619	$ 7,152

X

- Definition

Amount of financing receivable originated more than five years prior to current fiscal year.

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Amount of financing receivable originated in current fiscal year.

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Amount of financing receivable originated in fiscal year prior to current fiscal year.

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Amount of financing receivable originated three years prior to current fiscal year.

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Amount of financing receivable originated two years prior to current fiscal year.

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Amount of financing receivable that can be withdrawn, repaid and redrawn.

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Amount, before allowance for credit loss, of financing receivable.

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