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Business segment information - Schedule of certain information regarding the bank's operations by segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of Reporting Segment [Line Items] |  |  |
Interest income | $ 679,260 | $ 332,621 | $ 140,883
Interest expense | (446,077) | (184,610) | (54,101)
Inter-segment net interest income | 0 | 0 | 0
Net interest income | 233,183 | 148,011 | 86,782
Other income (expense), net | 32,936 | 18,661 | 17,424
Total revenues | 266,119 | 166,672 | 104,206
Provision for credit losses | (27,463) | (19,521) | (2,328)
Gain on non-financial assets, net |  |  | 742
Operating expenses | (72,498) | (55,111) | (39,923)
Segment profit (loss) | 166,158 | 92,040 | 62,697
Segment assets | 10,743,792 | 9,283,910 | 8,038,111
Total liabilities | 9,539,968 | 8,214,563 | 7,046,321
Reportable segments |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Segment profit (loss) | 166,158 | 92,040 | 62,697
Segment assets | 10,729,764 | 9,277,293 | 8,029,693
Total liabilities | 9,486,234 | 8,187,752 | 7,031,960
Commercial |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Interest income | 566,212 | 289,785 | 129,758
Interest expense | (467) | (463) | (648)
Inter-segment net interest income | (361,997) | (155,968) | (45,318)
Net interest income | 203,748 | 133,354 | 83,792
Other income (expense), net | 33,792 | 20,809 | 19,188
Total revenues | 237,540 | 154,163 | 102,980
Provision for credit losses | (26,785) | (13,376) | (1,050)
Gain on non-financial assets, net |  |  | 742
Operating expenses | (57,324) | (43,156) | (30,751)
Commercial | Reportable segments |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Segment profit (loss) | 153,431 | 97,631 | 71,921
Segment assets | 7,498,230 | 6,940,335 | 5,931,201
Total liabilities | 279,853 | 180,369 | 219,505
Treasury |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Interest income | 113,048 | 42,836 | 11,125
Interest expense | (445,610) | (184,147) | (53,453)
Inter-segment net interest income | 361,997 | 155,968 | 45,318
Net interest income | 29,435 | 14,657 | 2,990
Other income (expense), net | (856) | (2,148) | (1,764)
Total revenues | 28,579 | 12,509 | 1,226
Provision for credit losses | (678) | (6,145) | (1,278)
Gain on non-financial assets, net |  |  | 0
Operating expenses | (15,174) | (11,955) | (9,172)
Treasury | Reportable segments |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Segment profit (loss) | 12,727 | (5,591) | (9,224)
Segment assets | 3,231,534 | 2,336,958 | 2,098,492
Total liabilities | $ 9,206,381 | $ 8,007,383 | $ 6,812,455

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