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Note 12 - Derivative Financial Instruments (Details) - Effect of Derivative Instruments on the Consolidated Statements of Income - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Financial Derivatives: |  |  |  |
Financial Derivatives | $ (2,133) | $ (752) | $ 825 | $ (1,794)
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Financial Derivatives: |  |  |  |
Financial Derivatives | (2,125) | (719) | 871 | (1,733)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |
Financial Derivatives: |  |  |  |
Financial Derivatives | $ (8) | $ (33) | $ (46) | $ (61)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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