Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Goodwill, Beginning balance	$ 358,988
Goodwill, Ending balance	358,988
Intangible assets, Beginning balance	33,863
Intangible assets, Amortization	(1,329)	(1,064)
Intangible assets, Ending balance	32,534
Global Wealth Management [Member]
Goodwill, Beginning balance	143,828
Goodwill, Ending balance	143,828
Intangible assets, Beginning balance	18,819
Intangible assets, Amortization	(625)
Intangible assets, Ending balance	18,194
Institutional Group [Member]
Goodwill, Beginning balance	215,160
Goodwill, Ending balance	215,160
Intangible assets, Beginning balance	15,044
Intangible assets, Amortization	(704)
Intangible assets, Ending balance	$ 14,340