Intangible Assets (Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition) (Details) - USD ($) $ in Thousands		Jun. 30, 2017		Dec. 31, 2016
Intangible Assets [Line Items]
Gross Carrying Amount		$ 99,337		$ 72,270
Accumulated Amortization		(54,216)		(51,253)
Net Carrying Value		45,121		21,017
Core deposit intangibles
Intangible Assets [Line Items]
Gross Carrying Amount		16,850		16,850
Accumulated Amortization		(5,677)		(4,721)
Net Carrying Value		11,173		12,129
Customer Relationships
Intangible Assets [Line Items]
Gross Carrying Amount		76,865	[1]	54,865
Accumulated Amortization		(48,274)	[1]	(46,302)
Net Carrying Value		28,591	[1]	8,563
Other
Intangible Assets [Line Items]
Gross Carrying Amount	[2]	5,622	[1]	555
Accumulated Amortization	[2]	(265)	[1]	(230)
Net Carrying Value	[2]	5,357	[1]	325
State banking licenses
Intangible Assets [Line Items]
Net Carrying Value		$ 322		$ 322

[1] 2017 increase associated with the Coastal acquisition.

[2] Balance primarily includes noncompete covenants, as well as $322 thousand related to state banking licenses not subject to amortization.