Note 8 - Loans and Allowance for Loan Losses (Detail) - Loans by Class Modified as Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real Estate Mortgage Residential [Member] \| TDR Identified Current Period [Member]
Real Estate:
Number of Loans	2
Pre-Modification Outstanding Recorded Investment	$ 291
Post-Modification Outstanding Recorded Investment	291
Real Estate Mortgage Residential [Member]
Real Estate:
Post-Modification Outstanding Recorded Investment	2,953	634
TDR Identified Current Period [Member]
Real Estate:
Number of Loans	2
Pre-Modification Outstanding Recorded Investment	291
Post-Modification Outstanding Recorded Investment	$ 291

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Number of financing receivables that have been 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=7512638&loc=SL6953676-111524

+ Details

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- Definition

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings.

+ References

+ Details

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- Definition

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings.

+ References

+ Details

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