Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 4,348,944	$ 4,391,439	$ 4,737,088
Income/(loss) before income taxes		706,692	885,116	1,067,081
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	3,049,962	2,825,866	2,598,837
Income/(loss) before income taxes		1,215,822	1,067,571	914,953
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	1,226,317	1,536,017	2,152,439
Income/(loss) before income taxes		2,100	254,132	558,937
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	72,665	29,556	(14,188)
Income/(loss) before income taxes		$ (511,230)	$ (436,587)	$ (406,809)

[1] No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2023, 2022, and 2021.