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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | $ 1,153,136 | $ 895,817 | $ 2,287,925 | $ 1,808,851
Income/(loss) before income taxes |  | 264,025 | 142,960 | 491,917 | 258,066
Global Wealth Management [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 637,567 | 505,782 | 1,269,062 | 1,088,738
Income/(loss) before income taxes |  | 227,305 | 156,325 | 450,536 | 350,492
Institutional Group [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 520,811 | 398,096 | 1,026,892 | 730,334
Income/(loss) before income taxes |  | 141,494 | 83,049 | 258,682 | 124,789
Other Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | (5,242) | (8,061) | (8,029) | (10,221)
Income/(loss) before income taxes |  | $ (104,774) | $ (96,414) | $ (217,301) | $ (217,215)
[1] | No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2021 or 2020.

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