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Debt Securities Held-to-maturity - Credit quality indicators (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Debt securities held to maturity credit quality indicator |  |
Held to maturity securities | $ 79,461 | $ 92,621
Obligations of Puerto Rico, States and political subdivisions |  |
Debt securities held to maturity credit quality indicator |  |
Held to maturity securities | 73,476 | 81,029
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes |  |
Debt securities held to maturity credit quality indicator |  |
Held to maturity securities | 30,145 | 35,315
Watch | Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes |  |
Debt securities held to maturity credit quality indicator |  |
Held to maturity securities | 16,345 | 35,315
Pass | Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes |  |
Debt securities held to maturity credit quality indicator |  |
Held to maturity securities | $ 13,800 | $ 0

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