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Note 12 - Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Net gain (loss) |  | $ (111) | $ (1,753) | $ (3,532) | $ (882)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Net gain (loss) |  | (380) | (387) | (795) | (433)
Net gain (loss) | [1] | $ (491) | $ (2,140) | $ (4,327) | $ (1,315)
[1] | Net gains and losses are recorded as part of "Net gain (losses) from fair value adjustments" in the Consolidated Statements of Income.

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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=64837297&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=64837297&loc=SL5624171-113959 + Details
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