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Revenue from contracts with customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 316,640 | $ 275,191 | $ 903,181 | $ 812,084
Interest | 38,034 | 26,430 | 99,605 | 78,691
Principal transactions, net | 14,364 | 16,892 | 42,672 | 46,635
Other | 4,314 | (5,846) | 11,621 | 3,126
Total other sources of revenue | 56,712 | 37,476 | 153,898 | 128,452
Total revenue | 373,352 | 312,667 | 1,057,079 | 940,536
Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,003 | 42 | 3,961 | 198
Interest | 1,856 | 936 | 5,892 | 3,077
Principal transactions, net | 353 | 2,484 | 250 | 6,292
Other | 61 | 545 | 186 | 1,622
Total other sources of revenue | 2,270 | 3,965 | 6,328 | 10,991
Total revenue | 3,273 | 4,007 | 10,289 | 11,189
Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 189,338 | 174,814 | 558,792 | 525,942
Interest | 24,331 | 21,248 | 66,153 | 64,230
Principal transactions, net | 977 | (612) | 3,089 | 1,509
Other | 4,141 | (2,196) | 12,487 | 6,239
Total other sources of revenue | 29,449 | 18,440 | 81,729 | 71,978
Total revenue | 218,787 | 193,254 | 640,521 | 597,920
Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 27,432 | 25,188 | 79,632 | 72,023
Interest | 0 | 0 | 0 | 0
Principal transactions, net | 0 | 0 | 0 | 0
Other | (170) | (4,358) | (1,617) | (5,036)
Total other sources of revenue | (170) | (4,358) | (1,617) | (5,036)
Total revenue | 27,262 | 20,830 | 78,015 | 66,987
Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 98,867 | 75,147 | 260,796 | 213,921
Interest | 11,847 | 4,246 | 27,560 | 11,384
Principal transactions, net | 13,034 | 15,020 | 39,333 | 38,834
Other | 282 | 163 | 565 | 301
Total other sources of revenue | 25,163 | 19,429 | 67,458 | 50,519
Total revenue | 124,030 | 94,576 | 328,254 | 264,440
Commissions from sales and trading |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 94,842 | 75,719 | 271,765 | 235,524
Commissions from sales and trading | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 6 | 4 | 14 | 18
Commissions from sales and trading | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 46,641 | 36,176 | 136,337 | 112,766
Commissions from sales and trading | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Commissions from sales and trading | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 48,195 | 39,539 | 135,414 | 122,740
Mutual fund and insurance income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 8,237 | 8,214 | 24,219 | 23,650
Mutual fund and insurance income | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 5 | 4 | 15 | 12
Mutual fund and insurance income | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 8,231 | 8,209 | 24,201 | 23,632
Mutual fund and insurance income | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Mutual fund and insurance income | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1 | 1 | 3 | 6
Advisory fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 121,631 | 107,969 | 353,675 | 310,214
Advisory fees | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 11 | 7 | 31 | 23
Advisory fees | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 94,188 | 82,774 | 274,011 | 238,168
Advisory fees | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 27,432 | 25,188 | 79,633 | 72,023
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 | 19,387 | 19,410 | 54,863 | 38,471
Investment banking - capital markets | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | (1) | 0
Investment banking - capital markets | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2,410 | 2,115 | 8,238 | 5,590
Investment banking - capital markets | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Investment banking - capital markets | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 16,977 | 17,295 | 46,626 | 32,881
Investment banking - advisory |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 32,798 | 18,001 | 76,978 | 56,883
Investment banking - advisory | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Investment banking - advisory | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 21 | 0
Investment banking - advisory | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
Investment banking - advisory | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 32,798 | 18,001 | 76,957 | 56,883
Bank deposit sweep income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 34,875 | 42,304 | 106,406 | 135,273
Bank deposit sweep income | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | (1) | 0
Bank deposit sweep income | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 34,875 | 42,304 | 106,407 | 135,273
Bank deposit sweep income | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
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 | 4,870 | 3,574 | 15,275 | 12,069
Other | Corporate/Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 981 | 27 | 3,903 | 145
Other | Private Client | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2,993 | 3,236 | 9,577 | 10,513
Other | Asset Management | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | (1) | 0
Other | Capital Markets | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 896 | $ 311 | $ 1,796 | $ 1,411

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