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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | $ 725,647 | $ 652,145 | $ 1,401,178 | $ 1,272,119
Income/(loss) before income taxes |  | 83,198 | 15,793 | 162,217 | 59,706
Global Wealth Management [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 451,990 | 386,039 | 894,722 | 765,843
Income/(loss) before income taxes |  | 153,237 | 105,053 | 295,289 | 198,387
Institutional Group [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | 276,153 | 260,920 | 513,620 | 502,196
Income/(loss) before income taxes |  | 52,892 | 42,414 | 92,764 | 71,705
Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net revenues | [1] | (2,496) | 5,186 | (7,164) | 4,080
Income/(loss) before income taxes |  | $ (122,931) | $ (131,674) | $ (225,836) | $ (210,386)
[1] | No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016.

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