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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | $ 1,144,938 | $ 883,300 | $ 3,432,863 | $ 2,692,151
Income/(loss) before income taxes |  | 256,502 | 158,393 | 748,419 | 416,459
Global Wealth Management [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 655,533 | 526,836 | 1,924,595 | 1,615,574
Income/(loss) before income taxes |  | 232,119 | 178,930 | 682,655 | 529,422
Institutional Group [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 492,284 | 363,365 | 1,519,176 | 1,093,699
Income/(loss) before income taxes |  | 125,092 | 76,841 | 383,774 | 201,630
Other Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | (2,879) | (6,901) | (10,908) | (17,122)
Income/(loss) before income taxes |  | $ (100,709) | $ (97,378) | $ (318,010) | $ (314,593)
[1] | No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2021 or 2020.

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