Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Total assets	$ 8,709,459	$ 6,966,140
Global Wealth Management [Member]
Total assets	6,091,937	5,116,487
Institutional Group [Member]
Total assets	2,138,678	1,447,484
Other [Member]
Total assets	$ 478,844	$ 402,169