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LOANS HELD FOR INVESTMENT - Loan Portfolio Held for Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans held for investment	$ 11,298,618	$ 11,060,658
Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	9,247,998	9,113,918
Florida region [Member}
Loans held for investment	2,050,620	1,946,740
Residential Portfolio Segment [Member]
Loans held for investment	2,830,974	2,978,895
Residential Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	2,415,232	2,549,573
Residential Portfolio Segment [Member] | Florida region [Member}
Loans held for investment	415,742	429,322
Commercial Portfolio Segment [Member] | Commercial and Industrial loans [Member]
Loans held for investment	2,858,286	2,887,251
Commercial Portfolio Segment [Member] | Commercial and Industrial loans [Member] | Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	1,842,166	1,946,597
Commercial Portfolio Segment [Member] | Commercial and Industrial loans [Member] | Florida region [Member}
Loans held for investment	1,016,120	940,654
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans held for investment	2,265,614	2,167,469
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	1,754,447	1,702,231
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Florida region [Member}
Loans held for investment	511,167	465,238
Commercial Portfolio Segment [Member] | Construction loans [Member]
Loans held for investment	123,994	138,999
Commercial Portfolio Segment [Member] | Construction loans [Member] | Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	27,716	43,133
Commercial Portfolio Segment [Member] | Construction loans [Member] | Florida region [Member}
Loans held for investment	96,278	95,866
Consumer Portfolio Segment [Member]
Loans held for investment	3,219,750	2,888,044
Consumer Portfolio Segment [Member] | Puerto Rico and Virgin Islands regions [Member]
Loans held for investment	3,208,437	2,872,384
Consumer Portfolio Segment [Member] | Florida region [Member}
Loans held for investment	$ 11,313	$ 15,660

X

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 50
-Paragraph 5
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-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
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-Section 1405
-Paragraph (a)
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
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