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DEBT SECURITIES - ACL for Debt Securities Available-for-Sale (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance |  |  | $ 1,105,000 |
Ending Balance | $ 664,000 |  | 664,000 |
MBS [Member] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance |  |  | 797,000 |
Ending Balance | 290,000 |  | 290,000 |
MBS [Member] | Private label [Member] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance |  |  | 800,000 |
Ending Balance | 300,000 |  | 300,000 |
Available-for-sale Securities [Member] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance | 676,000 | $ 1,166,000 | 1,105,000 | $ 1,310,000
Provision for credit losses - (benefit) expense | (12,000) | (9,000) | (435,000) | (136,000)
Net charge-offs |  |  | (6,000) | (17,000)
Ending Balance | 664,000 | 1,157,000 | 664,000 | 1,157,000
Available-for-sale Securities [Member] | MBS [Member] | Private label [Member] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance | 290,000 | 858,000 | 797,000 | 1,002,000
Provision for credit losses - (benefit) expense | 0 | (9,000) | (501,000) | (136,000)
Net charge-offs |  |  | (6,000) | (17,000)
Ending Balance | 290,000 | 849,000 | 290,000 | 849,000
Available-for-sale Securities [Member] | Puerto Rico government obligations [Member] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning Balance | 386,000 | 308,000 | 308,000 | 308,000
Provision for credit losses - (benefit) expense | (12,000) | 0 | 66,000 | 0
Net charge-offs |  |  | 0 | 0
Ending Balance | $ 374,000 | $ 308,000 | $ 374,000 | $ 308,000

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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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- Definition Amount of expense (reversal of expense) for allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis, with previously recorded allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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- Definition Amount of writeoff of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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