Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 170,257	$ 170,257
Accumulated Amortization	59,052	56,071
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	141,621	141,621
Accumulated Amortization	48,568	46,209
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24,713	24,713
Accumulated Amortization	9,083	8,670
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,345	1,345
Accumulated Amortization	474	379
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,578	2,578
Accumulated Amortization	$ 927	$ 813