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v3.25.1

Fair value measurement - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Assets |  |  |  |
Debt securities available-for-sale | $ 19,493,180 | $ 18,245,903 |  |
Mortgage servicing rights | 104,743 | 108,103 | $ 114,964 | $ 118,109
US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 14,273,968 | 12,995,110 |  |
Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 115,859 | 120,284 |  |
Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 750 | 2,250 |  |
Recurring |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 19,493,180 | 18,245,903 |  |
Trading account debt securities, excluding derivatives | 28,477 | 32,783 |  |
Equity securities at fair value | 45,536 | 46,045 |  |
Mortgage servicing rights | 104,743 | 108,103 |  |
Loans held-for-sale | 5,077 | 5,423 |  |
Derivatives | 20,828 | 26,023 |  |
Total assets measured at fair value on a recurring basis | 19,697,841 | 18,464,280 |  |
Liabilities |  |  |  |
Derivatives | (19,523) | (22,832) |  |
Total | (19,523) | (22,832) |  |
Recurring | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 14,273,968 | 12,995,110 |  |
Trading account debt securities, excluding derivatives | 8,534 | 2,824 |  |
Recurring | Obligations of Puerto Rico, States and political subdivisions |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 53 | 55 |  |
Recurring | Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 115,859 | 120,284 |  |
Recurring | CMO |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 636 | 655 |  |
Recurring | Mortgage Backed Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,102,603 | 5,128,259 |  |
Trading account debt securities, excluding derivatives | 19,127 | 29,116 |  |
Recurring | Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 750 | 2,250 |  |
Trading account debt securities, excluding derivatives | 127 | 133 |  |
Recurring | Level 1 |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 8,601,447 | 7,512,171 |  |
Trading account debt securities, excluding derivatives | 8,524 | 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 | 8,609,971 | 7,514,985 |  |
Liabilities |  |  |  |
Derivatives | 0 | 0 |  |
Total | 0 | 0 |  |
Recurring | Level 1 | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 8,601,447 | 7,512,171 |  |
Trading account debt securities, excluding derivatives | 8,524 | 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 | 10,890,526 | 10,730,998 |  |
Trading account debt securities, excluding derivatives | 19,742 | 29,752 |  |
Equity securities at fair value | 45,129 | 45,664 |  |
Mortgage servicing rights | 0 | 0 |  |
Loans held-for-sale | 5,077 | 5,423 |  |
Derivatives | 20,828 | 26,023 |  |
Total assets measured at fair value on a recurring basis | 10,981,302 | 10,837,860 |  |
Liabilities |  |  |  |
Derivatives | (19,523) | (22,832) |  |
Total | (19,523) | (22,832) |  |
Recurring | Level 2 | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,672,521 | 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 | 53 | 55 |  |
Recurring | Level 2 | Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 115,859 | 120,284 |  |
Recurring | Level 2 | CMO |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 636 | 655 |  |
Recurring | Level 2 | Mortgage Backed Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,102,146 | 5,127,775 |  |
Trading account debt securities, excluding derivatives | 19,043 | 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 | 1,207 | 2,734 |  |
Trading account debt securities, excluding derivatives | 211 | 217 |  |
Equity securities at fair value | 0 | 0 |  |
Mortgage servicing rights | 104,743 | 108,103 |  |
Loans held-for-sale | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Total assets measured at fair value on a recurring basis | 106,161 | 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 | 457 | 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 | 127 | 133 | $ 166 |
Recurring | NAV |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 0 | 0 |  |
Trading account debt securities, excluding derivatives | 0 | 0 |  |
Equity securities at fair value | 407 | 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 | 407 | 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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