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Debt Securities Held-to-maturity -Additional Information (Details) | Sep. 30, 2020 USD ($) score | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | --- | --- | --- | ---
Debt Securities, Held-to-maturity |  |  |  |  |  |
Amortized Cost | $ 93,163,000 |  | $ 97,662,000 |  |  |
Allowance for credit losses | 925,850,000 | $ 918,434,000 | 477,708,000 | $ 512,365,000 | $ 543,666,000 | $ 569,348,000
Securities in non-performing status | 0 |  |  |  |  |
Obligations of Puerto Rico, States and political subdivisions |  |  |  |  |  |
Debt Securities, Held-to-maturity |  |  |  |  |  |
Amortized Cost | $ 81,067,000 |  | $ 85,556,000 |  |  |
Average Credit Score Fico | score | 690 |  |  |  |  |
Percentage of nominal value | 65.00% |  |  |  |  |
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 | 2,900,000 |  |  |  |  |
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 | $ 9,500,000 |  |  |  |  |

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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity), past due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447 + Details
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