Goodwill And Other Intangible Assets (Gross Carrying Value And Accumulated Amortization Of Other Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 49,420		$ 54,119
Accumulated Amortization	(42,876)		(43,849)
Net Carrying Amount	6,544		10,270
Community Banking [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	49,420	[1]
Accumulated Amortization	(42,876)	[1]
Net Carrying Amount	6,544	[1]
Retail Banking [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount			49,420
Accumulated Amortization			(39,150)
Net Carrying Amount			10,270
Other (HSA Bank) [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount			4,699
Accumulated Amortization			(4,699)
Net Carrying Amount			$ 0

[1] These reporting units are included in the Community Banking segment for financial reporting purposes.