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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Net revenues | [1] | $ 675,531 | $ 619,974
Income/(loss) before income taxes |  | 79,019 | 43,913
Global Wealth Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | [1] | 442,732 | 379,805
Income/(loss) before income taxes |  | 142,052 | 93,335
Institutional Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | [1] | 237,467 | 241,276
Income/(loss) before income taxes |  | 39,872 | 29,194
Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | [1] | (4,668) | (1,107)
Income/(loss) before income taxes |  | $ (102,905) | $ (78,616)
[1] | No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2017 or 2016.

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