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Revenue from contracts with customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | $ 399,372 | $ 324,149
Interest | 37,531 | 36,369
Principal transactions, net | 10,787 | 8,975
Other | (2,595) | (1,668)
Total other sources of revenue | 45,723 | 43,676
Total revenue | 445,095 | 367,825
Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 1,261 | 1,342
Interest | 1,250 | 1,430
Principal transactions, net | (221) | (233)
Other | 3 | 39
Total other sources of revenue | 1,032 | 1,236
Total revenue | 2,293 | 2,578
Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 236,604 | 223,089
Interest | 20,863 | 21,485
Principal transactions, net | (897) | (587)
Other | (2,890) | (2,001)
Total other sources of revenue | 17,076 | 18,897
Total revenue | 253,680 | 241,986
Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 161,507 | 99,718
Interest | 15,418 | 13,454
Principal transactions, net | 11,905 | 9,795
Other | 292 | 294
Total other sources of revenue | 27,615 | 23,543
Total revenue | 189,122 | 123,261
Commissions from sales and trading |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 119,522 | 102,727
Commissions from sales and trading | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 14 | 12
Commissions from sales and trading | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 51,567 | 48,767
Commissions from sales and trading | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 67,941 | 53,948
Mutual fund and insurance income |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 8,819 | 8,151
Mutual fund and insurance income | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 7 | 6
Mutual fund and insurance income | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 8,811 | 8,144
Mutual fund and insurance income | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 1 | 1
Advisory fees |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 141,718 | 128,803
Advisory fees | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 24 | 11
Advisory fees | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 141,694 | 128,792
Advisory fees | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 0 | 0
Investment banking - capital markets |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 34,456 | 21,661
Investment banking - capital markets | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 0 | 0
Investment banking - capital markets | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 3,935 | 2,962
Investment banking - capital markets | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 30,521 | 18,699
Investment banking - advisory |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 63,264 | 25,962
Investment banking - advisory | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 0 | 0
Investment banking - advisory | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 268 | 0
Investment banking - advisory | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 62,996 | 25,962
Bank deposit sweep income |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 26,118 | 30,075
Bank deposit sweep income | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 0 | 0
Bank deposit sweep income | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 26,118 | 30,075
Bank deposit sweep income | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 0 | 0
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 5,475 | 6,770
Other | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 1,216 | 1,313
Other | Wealth Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | 4,211 | 4,349
Other | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue from contracts with customers | $ 48 | $ 1,108

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