Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 4,391,439	$ 4,737,088	$ 3,752,061
Income/(loss) before income taxes		885,116	1,067,081	651,160
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	2,825,866	2,598,837	2,190,826
Income/(loss) before income taxes		1,067,571	914,953	725,884
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	1,536,017	2,152,439	1,583,147
Income/(loss) before income taxes		254,132	558,937	325,285
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	29,556	(14,188)	(21,912)
Income/(loss) before income taxes		$ (436,587)	$ (406,809)	$ (400,009)

[1] No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2022, 2021, and 2020.