Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 962,282
Goodwill, Adjustments	15,447
Goodwill, Ending balance	977,729
Intangible assets, Beginning balance	116,304
Intangible assets, Amortization	(2,981)	$ (2,974)
Intangible assets, Ending balance	113,323
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	270,779
Goodwill, Adjustments	12,358
Goodwill, Ending balance	283,137
Intangible assets, Beginning balance	45,231
Intangible assets, Amortization	(1,067)
Intangible assets, Ending balance	44,164
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	691,503
Goodwill, Adjustments	3,089
Goodwill, Ending balance	694,592
Intangible assets, Beginning balance	71,073
Intangible assets, Amortization	(1,914)
Intangible assets, Ending balance	$ 69,159