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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | Disaggregation of Revenue The following presents the Company's revenue from contracts with customers disaggregated by major business activity and other sources of revenue for the years ended December 31, 2020 and 2019:
(Expressed in thousands) | For the Year Ended December 31, 2020
| Reportable Segments
| Private Client |  | Asset Management |  | Capital Markets |  | Corporate/Other |  | Total
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |
Commissions from sales and trading | $ | 174,346 |  |  | $ | — |  |  | $ | 185,542 |  |  | $ | 29 |  |  | $ | 359,917 |
Mutual fund income | 35,101 |  |  | 3 |  |  | 9 |  |  | 67 |  |  | 35,180 |
Advisory fees | 326,858 |  |  | 128,258 |  |  | 2 |  |  | 143 |  |  | 455,261 |
Investment banking - capital markets | 16,093 |  |  | — |  |  | 123,670 |  |  | — |  |  | 139,763 |
Investment banking - advisory | — |  |  | 2,000 |  |  | 80,535 |  |  | — |  |  | 82,535 |
Bank deposit sweep income | 34,829 |  |  | — |  |  | — |  |  | — |  |  | 34,829 |
Other | 14,316 |  |  | — |  |  | 2,485 |  |  | 127 |  |  | 16,928 |
Total revenues from contracts with customers | 601,543 |  |  | 130,261 |  |  | 392,243 |  |  | 366 |  |  | 1,124,413 |
Other sources of revenue: |  |  |  |  |  |  |  |  |
Interest | 25,148 |  |  | — |  |  | 7,749 |  |  | 580 |  |  | 33,477 |
Principal transactions, net | 3,300 |  |  | — |  |  | 26,306 |  |  | (1,732) |  |  | 27,874 |
Other | 12,092 |  |  | 13 |  |  | 454 |  |  | 344 |  |  | 12,903 |
Total other sources of revenue | 40,540 |  |  | 13 |  |  | 34,509 |  |  | (808) |  |  | 74,254 |
Total revenue | $ | 642,083 |  |  | $ | 130,274 |  |  | $ | 426,752 |  |  | $ | (442) |  |  | $ | 1,198,667 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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