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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | $ 742,732 | $ 725,647 | $ 1,493,090 | $ 1,401,178
Income/(loss) before income taxes |  | 118,347 | 83,198 | 237,901 | 162,217
Global Wealth Management [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 497,327 | 451,990 | 982,902 | 894,722
Income/(loss) before income taxes |  | 187,895 | 153,237 | 364,666 | 295,289
Institutional Group [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 252,825 | 276,153 | 522,903 | 513,620
Income/(loss) before income taxes |  | 36,024 | 52,892 | 80,594 | 92,764
Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | (7,420) | (2,496) | (12,715) | (7,164)
Income/(loss) before income taxes |  | $ (105,572) | $ (122,931) | $ (207,359) | $ (225,836)
[1] | No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2018 or 2017.

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