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Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Segment Reporting Information [Line Items]
Net revenues		$ 944,251	$ 821,572	$ 800,787	$ 770,420	$ 793,449	$ 738,342	$ 742,732	$ 750,358	$ 3,337,030	[1]	$ 3,024,881	[1]	$ 2,926,432	[1]
Income/(loss) before income taxes										599,138		534,362		269,536
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									2,130,559		1,990,319		1,822,218
Income/(loss) before income taxes										785,960		737,003		626,906
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									1,214,017		1,055,495		1,110,768
Income/(loss) before income taxes										175,670		157,051		217,981
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									(7,546)		(20,933)		(6,554)
Income/(loss) before income taxes										$ (362,492)		$ (359,692)		$ (575,351)
[1] No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2019, 2018, and 2017.

X

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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