Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 4,737,088	$ 3,752,061	$ 3,337,030
Income/(loss) before income taxes		1,067,081	651,160	599,138
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	2,598,837	2,190,826	2,130,559
Income/(loss) before income taxes		914,953	725,884	785,960
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	2,152,439	1,583,147	1,214,017
Income/(loss) before income taxes		558,937	325,285	175,670
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	(14,188)	(21,912)	(7,546)
Income/(loss) before income taxes		$ (406,809)	$ (400,009)	$ (362,492)

[1] No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2021, 2020, and 2019.