Note 13 - Commitments and Contingencies (Details) (USD $) In Billions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Commitments
Fair value of Off-Balance Sheet Arrangements		$ 2.7
Unused lines of Credit [Member]
Commitments
Unused Commitment to Extend Credit to Customers	9.6
Funds Held on Behalf of Customers [Member]
Commitments
Fair value of Off-Balance Sheet Arrangements	$ 2.7	$ 0

The fair value of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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