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Note 4 - Loans and Allowance for Loan Losses (Details) - TDR's Pre-Modification and Post-Modification (Performing Financing Receivable [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Residential real estate
Pre-Modification of Recorded Investment	$ 249
Post-Modification of Recorded Investment	249
Residential Portfolio Segment [Member] | Interest Only Payments [Member]
Residential real estate
Pre-Modification of Recorded Investment	249
Post-Modification of Recorded Investment	$ 249

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524

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- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524

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