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Note 19 - Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Net gain (loss) | [1] | $ 919 | $ (580) | $ 1,537
Not Designated as Hedging Instrument [Member] |  |  |  |
Net gain (loss) |  | 1,094 | (102) | 71
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |  |
Net gain (loss) |  | $ (175) | $ (478) | $ 1,466
[1] | Net gains (losses) are recorded as part of "Net loss 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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