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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
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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 + Details
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Period Type: | duration

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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 + Details
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