Goodwill And Other Intangible Assets (Goodwill And Other Intangible Assets, Net Of Accumulated Amortization) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 529,887		$ 529,887
Other intangible assets	6,544		10,270
Consumer Deposits [Member]
Goodwill [Line Items]
Goodwill	377,605	[1]
Other intangible assets	6,544	[1]
Small Business [Member]
Goodwill [Line Items]
Goodwill	138,955
Community Banking [Member]
Goodwill [Line Items]
Goodwill	516,560
Other intangible assets	6,544
Retail Banking [Member]
Goodwill [Line Items]
Goodwill			516,560
Other intangible assets			10,270
Other (HSA Bank) [Member]
Goodwill [Line Items]
Goodwill	$ 13,327		$ 13,327

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