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Note 12 - Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Net gain (loss) |  | $ (2,415) | $ 662 | $ (4,102) | $ 2,392
Not Designated as Hedging Instrument [Member] |  |  |  |  |
Net gain (loss) | [1] | (1,597) | 438 | (2,647) | 1,714
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |  |  |
Net gain (loss) | [2] | $ (818) | $ 224 | $ (1,455) | $ 678
[1] | Net gains and losses are recorded as part of "Net gain/loss from fair value adjustments" in the Consolidated Statements of Income.
[2] | Net gains and losses recorded during the three and six months ended June 30, 2019, are recorded as part of "Interests and fees on loans" in the Consolidated Statements of Income. Net gains and losses recorded during the three and six months ended June 30, 2018, are recorded as part of "Net gain/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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