Loans and Leases (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Noncovered loans pledged to secure debt obligations	$ 2,534,250	$ 2,570,773
Charge off of past due business credit card loans (days)	120 days
Ungraded \| Business Credit Card Loans
Financing Receivable, Recorded Investment [Line Items]
Loans to finance buyout, outstanding balance	73,701
Ungraded \| Tobacco Buyout Loans
Financing Receivable, Recorded Investment [Line Items]
Loans to finance buyout, outstanding balance	$ 21,808

The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of other debt obligations, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant