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Debt Securities Held-to-maturity -Additional Information (Details) | Dec. 31, 2020 USD ($) score | Jan. 02, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | --- | ---
Debt Securities, Held-to-maturity |  |  |  |
Amortized Cost | $ 92,621,000 |  | $ 97,662,000 |
Allowance for credit losses | 10,261,000 | $ 13,000,000 | 0 |
Allowance for loan losses | 896,250,000 |  | 477,708,000 | $ 569,348,000
Securities in non-performing status | 0 |  |  |
Obligations of Puerto Rico, States and political subdivisions |  |  |  |
Debt Securities, Held-to-maturity |  |  |  |
Amortized Cost | 81,029,000 |  | 85,556,000 |
Allowance for credit losses | $ 10,261,000 |  | $ 0 |
Average Credit Score Fico | score | 697 |  |  |
Percentage of nominal value | 66.00% |  |  |
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes |  |  |  |
Debt Securities, Held-to-maturity |  |  |  |
Amortized Cost | $ 35,315,000 |  |  |
Allowance for credit losses | 1,400,000 |  |  |
Obligations of Puerto Rico, States and political subdivisions | Munis Not Guaranteed By Puerto Rico Central Government |  |  |  |
Debt Securities, Held-to-maturity |  |  |  |
Amortized Cost | 46,000,000 |  |  |
Allowance for credit losses | $ 8,900,000 |  |  |

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- Definition Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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