Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 37,877,577	$ 37,196,124
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	32,601,555	32,449,466
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	4,779,831	4,285,212
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 496,191	$ 461,446