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Financial risk review - Schedule of Bank's Interest Rate Gap Position (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Assets |  |  |  |
Securities | $ 1,022,131 | $ 1,023,632 |  |
Loans | 7,195,567 | 6,763,020 |  |
Liabilities |  |  |  |
Securities sold under repurchase agreements | (310,197) | (300,498) | $ (427,498) |
Borrowings and debt | (4,351,988) | (4,416,511) | $ (3,304,178) | $ (1,966,271)
Interest rate and foreign exchange risk |  |  |  |
Assets |  |  |  |
Cash and due from banks | 2,047,452 | 1,241,586 |  |
Securities | 1,011,368 | 1,019,943 |  |
Loans | 7,195,567 | 6,763,020 |  |
Total | 10,254,387 | 9,024,549 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (4,408,149) | (3,190,716) |  |
Securities sold under repurchase agreements | (310,197) | (300,498) |  |
Borrowings and debt | (4,351,988) | (4,416,511) |  |
Total | (9,070,334) | (7,907,725) |  |
Net effect of derivative financial instruments held for interest risk management | 127,733 | 12,527 |  |
Total interest rate sensitivity | 1,311,786 | 1,129,351 |  |
Interest rate risk | Up to 3 months |  |  |  |
Assets |  |  |  |
Cash and due from banks | 2,044,103 | 1,233,700 |  |
Securities | 14,169 | 112,736 |  |
Loans | 4,292,324 | 2,956,268 |  |
Total | 6,350,596 | 4,302,704 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (3,553,774) | (2,746,776) |  |
Securities sold under repurchase agreements | (310,197) | (52,164) |  |
Borrowings and debt | (2,653,379) | (1,354,457) |  |
Total | (6,517,350) | (4,153,397) |  |
Net effect of derivative financial instruments held for interest risk management | (3,485) | 476 |  |
Total interest rate sensitivity | (170,239) | 149,783 |  |
Interest rate risk | 3 to 6 months |  |  |  |
Assets |  |  |  |
Cash and due from banks | 0 | 0 |  |
Securities | 60,256 | 114,815 |  |
Loans | 1,699,301 | 2,531,067 |  |
Total | 1,759,557 | 2,645,882 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (442,338) | (250,299) |  |
Securities sold under repurchase agreements | 0 | (62,968) |  |
Borrowings and debt | (381,795) | (953,503) |  |
Total | (824,133) | (1,266,770) |  |
Net effect of derivative financial instruments held for interest risk management | 3,790 | 41 |  |
Total interest rate sensitivity | 939,214 | 1,379,153 |  |
Interest rate risk | 6 months to 1 year |  |  |  |
Assets |  |  |  |
Cash and due from banks | 0 | 0 |  |
Securities | 82,951 | 82,666 |  |
Loans | 915,143 | 1,007,343 |  |
Total | 998,094 | 1,090,009 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (342,686) | (153,862) |  |
Securities sold under repurchase agreements | 0 | (53,740) |  |
Borrowings and debt | (483,731) | (1,083,543) |  |
Total | (826,417) | (1,291,145) |  |
Net effect of derivative financial instruments held for interest risk management | 47,134 | 2,145 |  |
Total interest rate sensitivity | 218,811 | (198,991) |  |
Interest rate risk | 1 to 5 years |  |  |  |
Assets |  |  |  |
Cash and due from banks | 0 | 0 |  |
Securities | 824,836 | 701,749 |  |
Loans | 280,005 | 240,949 |  |
Total | 1,104,841 | 942,698 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (59,029) | (35,082) |  |
Securities sold under repurchase agreements | 0 | (131,626) |  |
Borrowings and debt | (818,947) | (999,151) |  |
Total | (877,976) | (1,165,859) |  |
Net effect of derivative financial instruments held for interest risk management | 78,855 | 12,215 |  |
Total interest rate sensitivity | 305,720 | (210,946) |  |
Interest rate risk | More than 5 years |  |  |  |
Assets |  |  |  |
Cash and due from banks | 0 | 0 |  |
Securities | 29,156 | 7,977 |  |
Loans | 8,794 | 27,393 |  |
Total | 37,950 | 35,370 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | 0 | 0 |  |
Securities sold under repurchase agreements | 0 | 0 |  |
Borrowings and debt | (14,136) | (25,857) |  |
Total | (14,136) | (25,857) |  |
Net effect of derivative financial instruments held for interest risk management | 1,439 | (2,350) |  |
Total interest rate sensitivity | 25,253 | 7,163 |  |
Without interest rate risk |  |  |  |
Assets |  |  |  |
Cash and due from banks | 3,349 | 7,886 |  |
Securities | 0 | 0 |  |
Loans | 0 | 0 |  |
Total | 3,349 | 7,886 |  |
Liabilities |  |  |  |
Demand deposits and time deposits | (10,322) | (4,697) |  |
Securities sold under repurchase agreements | 0 | 0 |  |
Borrowings and debt | 0 | 0 |  |
Total | (10,322) | (4,697) |  |
Net effect of derivative financial instruments held for interest risk management | 0 | 0 |  |
Total interest rate sensitivity | $ (6,973) | $ 3,189 |  |

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