Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 9,359,179	$ 9,518,151
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	5,719,140	5,816,284
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	3,418,526	3,476,592
Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 221,513	$ 225,275