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Note 18 - Fair Value of Financial Instruments (Details) - Financial Assets and Liabilities Reported Under the Fair Value Option - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Fair Value Measurements |  | $ 30,700 | $ 32,600 |
Net gain (loss) from fair value adjustments |  | (1,841) | (2,568) | $ (2,521)
Collateralized Mortgage Backed Securities [Member] |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Fair Value Measurements |  | 2,527 | 4,678 |
Net gain (loss) from fair value adjustments |  | (59) | 75 | (725)
Other Securities [Member] |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Fair Value Measurements |  | 28,205 | 27,915 |
Net gain (loss) from fair value adjustments |  | 53 | 598 | 241
Borrowed Funds [Member] |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Fair Value Measurements |  | 29,018 | 28,771 |
Net gain (loss) from fair value adjustments |  | (238) | 802 | (5,651)
Financial Assets And Liabilities, Excluding Interest Rate Caps / Swaps [Member] |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Net gain (loss) from fair value adjustments | [1] | $ (244) | $ 1,475 | $ (6,135)
[1] | The net gain (loss) from fair value adjustments presented in the above table does not include net gains and (losses) of ($1.6) million, ($4.0) million and $3.6 million from the change in fair value of derivative instruments during the years ended December 31, 2015, 2014 and 2013, respectively.

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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
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