Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance				$ 795,026,000
Goodwill, Net additions				89,767,000
Goodwill, Impairment losses	$ 0
Goodwill, Ending balance		$ 884,793,000		884,793,000
Intangible assets, Beginning balance				54,563,000
Intangible assets, Net additions				9,868,000
Intangible assets, Amortization		(1,900,000)	$ (1,600,000)	(5,952,000)	$ (9,762,000)
Intangible assets, Ending balance		58,479,000		58,479,000
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance				177,171,000
Goodwill, Net additions				83,971,000
Goodwill, Ending balance		261,142,000		261,142,000
Intangible assets, Beginning balance				23,503,000
Intangible assets, Net additions				9,868,000
Intangible assets, Amortization				(3,244,000)
Intangible assets, Ending balance		30,127,000		30,127,000
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance				617,855,000
Goodwill, Net additions				5,796,000
Goodwill, Ending balance		623,651,000		623,651,000
Intangible assets, Beginning balance				31,060,000
Intangible assets, Amortization				(2,708,000)
Intangible assets, Ending balance		$ 28,352,000		$ 28,352,000