Goodwill And Other Intangible Assets (Goodwill And Other Intangible Assets, Net Of Accumulated Amortization) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 529,887	$ 529,887
Other intangible assets	7,786	10,270
Total goodwill and other intangible assets	537,673	540,157
Retail Banking [Member]
Goodwill [Line Items]
Goodwill	516,560	516,560
Other intangible assets	7,786	10,270
Other (HSA Bank) [Member]
Goodwill [Line Items]
Goodwill	$ 13,327	$ 13,327