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Note 5 - Loans and Allowance for Credit Losses (Details) - Troubled Debt Restructurings $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 10 |  | 6
TDRs | $ 15,445 | $ 2,100 | $ 13,729
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 4 |  | 1
TDRs | $ 1,387 |  | $ 227
Income Producing Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 4 |  | 3
TDRs | $ 8,512 |  | $ 7,849
Owner Occupied Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 1 |  | 1
TDRs | $ 509 |  | $ 565
Construction Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 1 |  | 1
TDRs | $ 5,037 |  | $ 5,088
Performing Financial Instruments [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 15,230 |  | 13,502
Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 1,172 |  |
Performing Financial Instruments [Member] | Income Producing Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 8,512 |  | 7,849
Performing Financial Instruments [Member] | Owner Occupied Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 509 |  | 565
Performing Financial Instruments [Member] | Construction Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 5,037 |  | 5,088
Nonperforming Financial Instruments [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | 215 |  | 227
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
TDRs | $ 215 |  | $ 227

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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=49124121&loc=SL6953676-111524 + Details
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