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Revenue from contracts with customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | $ 302,635 | $ 278,711
Interest | 26,766 | 24,941
Principal transactions, net | 18,234 | 13,490
Other | 5,503 | 4,537
Total other sources of revenue | 50,503 | 42,968
Total revenue | 353,138 | 321,679
Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 1,001 | 114
Interest | 2,267 | 1,333
Principal transactions, net | (235) | 2,037
Other | 61 | 533
Total other sources of revenue | 2,093 | 3,903
Total revenue | 3,094 | 4,017
Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 184,813 | 177,908
Interest | 20,196 | 20,579
Principal transactions, net | 1,736 | 1,049
Other | 6,288 | 3,885
Total other sources of revenue | 28,220 | 25,513
Total revenue | 213,033 | 203,421
Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 25,960 | 23,954
Interest | 0 | 0
Principal transactions, net | 0 | 0
Other | (1,032) | 5
Total other sources of revenue | (1,032) | 5
Total revenue | 24,928 | 23,959
Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 90,861 | 76,735
Interest | 4,303 | 3,029
Principal transactions, net | 16,733 | 10,404
Other | 186 | 114
Total other sources of revenue | 21,222 | 13,547
Total revenue | 112,083 | 90,282
Commissions from sales and trading |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 87,980 | 78,977
Commissions from sales and trading | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 5 | 6
Commissions from sales and trading | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 44,930 | 38,924
Commissions from sales and trading | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Commissions from sales and trading | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 43,045 | 40,047
Mutual fund and insurance income |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 7,870 | 7,720
Mutual fund and insurance income | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 5 | 4
Mutual fund and insurance income | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 7,864 | 7,712
Mutual fund and insurance income | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Mutual fund and insurance income | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 1 | 4
Advisory fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 114,847 | 100,544
Advisory fees | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 11 | 7
Advisory fees | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 88,876 | 76,583
Advisory fees | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 25,960 | 23,954
Advisory fees | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Investment banking - capital markets |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 18,648 | 10,028
Investment banking - capital markets | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Investment banking - capital markets | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 3,021 | 1,787
Investment banking - capital markets | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Investment banking - capital markets | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 15,627 | 8,241
Investment banking - advisory |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 31,889 | 27,937
Investment banking - advisory | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Investment banking - advisory | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 21 | 0
Investment banking - advisory | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Investment banking - advisory | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 31,868 | 27,937
Bank deposit sweep income |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 36,685 | 48,909
Bank deposit sweep income | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Bank deposit sweep income | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 36,685 | 48,909
Bank deposit sweep income | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Bank deposit sweep income | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 4,716 | 4,596
Other | Corporate/Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 980 | 97
Other | Private Client | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 3,416 | 3,993
Other | Asset Management | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | 0 | 0
Other | Capital Markets | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers: | $ 320 | $ 506

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