Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			$ 962,282
Goodwill, Adjustments			7,482
Goodwill, Ending balance	$ 969,764		969,764
Intangible assets, Beginning balance			116,304
Intangible assets, Net Additions			5,195
Intangible assets, Amortization	(3,200)	$ (5,000)	(6,246)	$ (8,008)
Intangible assets, Ending balance	115,253		115,253
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			270,779
Goodwill, Adjustments			6,622
Goodwill, Ending balance	277,401		277,401
Intangible assets, Beginning balance			45,231
Intangible assets, Net Additions			3,800
Intangible assets, Amortization			(2,273)
Intangible assets, Ending balance	46,758		46,758
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			691,503
Goodwill, Adjustments			860
Goodwill, Ending balance	692,363		692,363
Intangible assets, Beginning balance			71,073
Intangible assets, Net Additions			1,395
Intangible assets, Amortization			(3,973)
Intangible assets, Ending balance	$ 68,495		$ 68,495