Goodwill and Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 207,529	$ 200,225
Accumulated Amortization	87,802	80,570
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	167,624	160,745
Accumulated Amortization	70,274	65,254
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	27,131	26,831
Accumulated Amortization	12,540	11,755
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,615	8,615
Accumulated Amortization	1,940	816
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,714	2,603
Accumulated Amortization	1,736	1,452
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,445	1,431
Accumulated Amortization	$ 1,312	$ 1,293