Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 35,087,698	$ 34,049,715
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	29,378,822	28,219,800
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	4,945,151	5,151,841
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 763,725	$ 678,074