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v3.25.3

Fair value measurement - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | ---
Assets |  |  |
Debt securities available-for-sale | $ 20,686,423 | $ 18,245,903 |
Mortgage servicing rights | 99,523 | 108,103 |
US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 15,706,765 | 12,995,110 |
Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 104,700 | 120,284 |
Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 750 | 2,250 |
Recurring |  |  |
Assets |  |  |
Debt securities available-for-sale | 20,686,423 | 18,245,903 |
Trading account debt securities, excluding derivatives | 33,106 | 32,783 |
Equity securities at fair value | 50,872 | 46,045 |
Mortgage servicing rights | 99,523 | 108,103 |
Loans held-for-sale | 4,785 | 5,423 |
Derivatives | 27,716 | 26,023 |
Total assets measured at fair value on a recurring basis | 20,902,425 | 18,464,280 |
Liabilities |  |  |
Derivatives | (26,157) | (22,832) |
Total | (26,157) | (22,832) |
Recurring | US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 15,706,765 | 12,995,110 |
Trading account debt securities, excluding derivatives | 8,036 | 2,824 |
Recurring | Obligations of Puerto Rico, States and political subdivisions |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 46 | 55 |
Recurring | Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 104,700 | 120,284 |
Recurring | CMO |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 595 | 655 |
Recurring | Mortgage Backed Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 4,874,208 | 5,128,259 |
Trading account debt securities, excluding derivatives | 24,311 | 29,116 |
Recurring | Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 750 | 2,250 |
Trading account debt securities, excluding derivatives | 118 | 133 |
Recurring | Level 1 |  |  |
Assets |  |  |
Debt securities available-for-sale | 6,423,246 | 7,512,171 |
Trading account debt securities, excluding derivatives | 8,026 | 2,814 |
Equity securities at fair value | 0 | 0 |
Mortgage servicing rights | 0 | 0 |
Loans held-for-sale | 0 | 0 |
Derivatives | 0 | 0 |
Total assets measured at fair value on a recurring basis | 6,431,272 | 7,514,985 |
Liabilities |  |  |
Derivatives | 0 | 0 |
Total | 0 | 0 |
Recurring | Level 1 | US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 6,423,246 | 7,512,171 |
Trading account debt securities, excluding derivatives | 8,026 | 2,814 |
Recurring | Level 1 | Obligations of Puerto Rico, States and political subdivisions |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 1 | Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Recurring | Level 1 | CMO |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 1 | Mortgage Backed Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 1 | Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 2 |  |  |
Assets |  |  |
Debt securities available-for-sale | 14,261,996 | 10,730,998 |
Trading account debt securities, excluding derivatives | 24,878 | 29,752 |
Equity securities at fair value | 50,047 | 45,664 |
Mortgage servicing rights | 0 | 0 |
Loans held-for-sale | 4,785 | 5,423 |
Derivatives | 27,716 | 26,023 |
Total assets measured at fair value on a recurring basis | 14,369,422 | 10,837,860 |
Liabilities |  |  |
Derivatives | (26,157) | (22,832) |
Total | (26,157) | (22,832) |
Recurring | Level 2 | US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 9,283,519 | 5,482,939 |
Trading account debt securities, excluding derivatives | 10 | 10 |
Recurring | Level 2 | Obligations of Puerto Rico, States and political subdivisions |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 46 | 55 |
Recurring | Level 2 | Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 104,700 | 120,284 |
Recurring | Level 2 | CMO |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 595 | 655 |
Recurring | Level 2 | Mortgage Backed Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 4,873,777 | 5,127,775 |
Trading account debt securities, excluding derivatives | 24,227 | 29,032 |
Recurring | Level 2 | Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 3 |  |  |
Assets |  |  |
Debt securities available-for-sale | 1,181 | 2,734 |
Trading account debt securities, excluding derivatives | 202 | 217 |
Equity securities at fair value | 0 | 0 |
Mortgage servicing rights | 99,523 | 108,103 |
Loans held-for-sale | 0 | 0 |
Derivatives | 0 | 0 |
Total assets measured at fair value on a recurring basis | 100,906 | 111,054 |
Liabilities |  |  |
Derivatives | 0 | 0 |
Total | 0 | 0 |
Recurring | Level 3 | US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 3 | Obligations of Puerto Rico, States and political subdivisions |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 3 | Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Recurring | Level 3 | CMO |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | Level 3 | Mortgage Backed Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 431 | 484 |
Trading account debt securities, excluding derivatives | 84 | 84 |
Recurring | Level 3 | Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 750 | 2,250 |
Trading account debt securities, excluding derivatives | 118 | 133 | $ 154
Recurring | NAV |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Equity securities at fair value | 825 | 381 |
Mortgage servicing rights | 0 | 0 |
Loans held-for-sale | 0 | 0 |
Derivatives | 0 | 0 |
Total assets measured at fair value on a recurring basis | 825 | 381 |
Liabilities |  |  |
Derivatives | 0 | 0 |
Total | 0 | 0 |
Recurring | NAV | US Treasury Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | NAV | Obligations of Puerto Rico, States and political subdivisions |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | NAV | Collateralized Mortgage Obligations - Federal agencies |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Recurring | NAV | CMO |  |  |
Assets |  |  |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | NAV | Mortgage Backed Securities |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | 0 | 0 |
Recurring | NAV | Other |  |  |
Assets |  |  |
Debt securities available-for-sale | 0 | 0 |
Trading account debt securities, excluding derivatives | $ 0 | $ 0 |

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