Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 13,335,915	$ 9,518,151
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	10,519,575	5,816,284
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	2,193,781	3,476,592
Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 622,559	$ 225,275