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v3.24.3

Fair value measurement - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets |  |  |  |
Debt securities available-for-sale | $ 17,186,123 | $ 16,729,044 |  |
Mortgage servicing rights | 108,827 | 118,109 | $ 119,030 | $ 128,350
US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 11,524,430 | 10,747,061 |  |
Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 128,553 | 134,686 |  |
Mortgage Backed Securities - federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,531,140 | 5,844,786 |  |
Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 2,000 | 2,511 |  |
Recurring |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 17,186,123 | 16,729,044 |  |
Trading account debt securities, excluding derivatives | 30,836 | 31,568 |  |
Equity securities at fair value | 46,633 | 38,275 |  |
Mortgage servicing rights | 108,827 | 118,109 |  |
Loans held-for-sale | 5,509 | 3,239 |  |
Derivatives | 25,941 | 24,419 |  |
Total assets measured at fair value on recurring /nonrecurring basis | 17,403,869 | 16,944,654 |  |
Liabilities |  |  |  |
Derivatives | (23,608) | (21,103) |  |
Total | (23,608) | (21,103) |  |
Recurring | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 11,524,430 | 10,747,061 |  |
Trading account debt securities, excluding derivatives | 7,685 | 16,859 |  |
Recurring | Obligations of Puerto Rico, States and political subdivisions |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 58 | 71 |  |
Recurring | Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 128,553 | 134,686 |  |
Recurring | CMO |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 132 | 98 |  |
Recurring | Mortgage Backed Securities - federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,531,140 | 5,844,786 |  |
Trading account debt securities, excluding derivatives | 22,807 | 14,373 |  |
Recurring | Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 2,000 | 2,511 |  |
Trading account debt securities, excluding derivatives | 154 | 167 |  |
Recurring | Level 1 |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,879,911 | 3,936,036 |  |
Trading account debt securities, excluding derivatives | 7,675 | 16,859 |  |
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 recurring /nonrecurring basis | 5,887,586 | 3,952,895 |  |
Liabilities |  |  |  |
Derivatives | 0 | 0 |  |
Total | 0 | 0 |  |
Recurring | Level 1 | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,879,911 | 3,936,036 |  |
Trading account debt securities, excluding derivatives | 7,675 | 16,859 |  |
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 - federal agencies |  |  |  |
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 | 11,303,654 | 12,789,902 |  |
Trading account debt securities, excluding derivatives | 22,923 | 14,425 |  |
Equity securities at fair value | 46,248 | 37,965 |  |
Mortgage servicing rights | 0 | 0 |  |
Loans held-for-sale | 5,509 | 3,239 |  |
Derivatives | 25,941 | 24,419 |  |
Total assets measured at fair value on recurring /nonrecurring basis | 11,404,275 | 12,869,950 |  |
Liabilities |  |  |  |
Derivatives | (23,608) | (21,103) |  |
Total | (23,608) | (21,103) |  |
Recurring | Level 2 | US Treasury Securities |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,644,519 | 6,811,025 |  |
Trading account debt securities, excluding derivatives | 10 | 0 |  |
Recurring | Level 2 | Obligations of Puerto Rico, States and political subdivisions |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 58 | 71 |  |
Recurring | Level 2 | Collateralized Mortgage Obligations - Federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 128,553 | 134,686 |  |
Recurring | Level 2 | CMO |  |  |  |
Assets |  |  |  |
Trading account debt securities, excluding derivatives | 132 | 93 |  |
Recurring | Level 2 | Mortgage Backed Securities - federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 5,530,582 | 5,844,180 |  |
Trading account debt securities, excluding derivatives | 22,723 | 14,261 |  |
Recurring | Level 2 | Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 0 | 11 |  |
Trading account debt securities, excluding derivatives | 0 | 0 |  |
Recurring | Level 3 |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 2,558 | 3,106 |  |
Trading account debt securities, excluding derivatives | 238 | 284 |  |
Equity securities at fair value | 0 | 0 |  |
Mortgage servicing rights | 108,827 | 118,109 |  |
Loans held-for-sale | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Total assets measured at fair value on recurring /nonrecurring basis | 111,623 | 121,499 |  |
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 | 5 | 10 |
Recurring | Level 3 | Mortgage Backed Securities - federal agencies |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 558 | 606 |  |
Trading account debt securities, excluding derivatives | 84 | 112 |  |
Recurring | Level 3 | Other |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 2,000 | 2,500 |  |
Trading account debt securities, excluding derivatives | 154 | 167 | $ 188 |
Recurring | NAV |  |  |  |
Assets |  |  |  |
Debt securities available-for-sale | 0 | 0 |  |
Trading account debt securities, excluding derivatives | 0 | 0 |  |
Equity securities at fair value | 385 | 310 |  |
Mortgage servicing rights | 0 | 0 |  |
Loans held-for-sale | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Total assets measured at fair value on recurring /nonrecurring basis | 385 | 310 |  |
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 - federal agencies |  |  |  |
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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