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Revenue from contracts with customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 313,405 | $ 283,906 | $ 637,554 | $ 586,541
Interest | 38,017 | 34,805 | 74,386 | 61,571
Principal transactions, net | 14,532 | 10,074 | 23,507 | 28,308
Other | 7,224 | 1,804 | 5,556 | 7,307
Total other sources of revenue | 59,773 | 46,683 | 103,449 | 97,186
Total revenue | 373,178 | 330,589 | 741,003 | 683,727
Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,435 | 1,957 | 2,777 | 2,958
Interest | 1,822 | 1,769 | 3,252 | 4,036
Principal transactions, net | 508 | 132 | 275 | (103)
Other | 11 | 64 | 50 | 125
Total other sources of revenue | 2,341 | 1,965 | 3,577 | 4,058
Total revenue | 3,776 | 3,922 | 6,354 | 7,016
Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 215,430 | 210,881 | 438,519 | 421,654
Interest | 21,943 | 21,626 | 43,428 | 41,822
Principal transactions, net | 1,973 | 376 | 1,386 | 2,112
Other | 7,075 | 1,643 | 5,074 | 6,899
Total other sources of revenue | 30,991 | 23,645 | 49,888 | 50,833
Total revenue | 246,421 | 234,526 | 488,407 | 472,487
Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 96,540 | 71,068 | 196,258 | 161,929
Interest | 14,252 | 11,410 | 27,706 | 15,713
Principal transactions, net | 12,051 | 9,566 | 21,846 | 26,299
Other | 138 | 97 | 432 | 283
Total other sources of revenue | 26,441 | 21,073 | 49,984 | 42,295
Total revenue | 122,981 | 92,141 | 246,242 | 204,224
Commissions from sales and trading |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 102,433 | 88,943 | 205,160 | 176,923
Commissions from sales and trading | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 13 | 3 | 25 | 8
Commissions from sales and trading | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 47,203 | 44,766 | 95,970 | 89,696
Commissions from sales and trading | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 55,217 | 44,174 | 109,165 | 87,219
Mutual fund and insurance income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 7,592 | 8,112 | 15,743 | 15,982
Mutual fund and insurance income | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 6 | 5 | 12 | 10
Mutual fund and insurance income | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 7,585 | 8,106 | 15,729 | 15,970
Mutual fund and insurance income | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1 | 1 | 2 | 2
Advisory fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 125,628 | 117,197 | 254,431 | 232,044
Advisory fees | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 18 | 9 | 29 | 20
Advisory fees | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 125,610 | 117,188 | 254,402 | 232,024
Advisory fees | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Investment banking - capital markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 21,046 | 16,828 | 42,707 | 35,476
Investment banking - capital markets | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | (1) | 0 | (1)
Investment banking - capital markets | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2,758 | 2,807 | 5,720 | 5,828
Investment banking - capital markets | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 18,288 | 14,022 | 36,987 | 29,649
Investment banking - advisory |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 22,487 | 12,291 | 48,449 | 44,180
Investment banking - advisory | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Investment banking - advisory | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 21
Investment banking - advisory | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 22,487 | 12,291 | 48,449 | 44,159
Bank deposit sweep income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 28,654 | 34,846 | 58,729 | 71,531
Bank deposit sweep income | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | (1) | 0 | (1)
Bank deposit sweep income | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 28,654 | 34,847 | 58,729 | 71,532
Bank deposit sweep income | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 5,565 | 5,689 | 12,335 | 10,405
Other | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,398 | 1,942 | 2,711 | 2,922
Other | Wealth Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 3,620 | 3,167 | 7,969 | 6,583
Other | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 547 | $ 580 | $ 1,655 | $ 900

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