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Note 11 - Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Net gain (loss)	[1]	$ 1,730	$ 166
Not Designated as Hedging Instrument [Member]
Net gain (loss)		1,276	232
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Net gain (loss)		$ 454	$ (66)
[1] Net gains (losses) are recorded as "Net loss from fair value adjustments" in the Consolidated Statements of Income.

X

- 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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- Details

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- Details

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- Details

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- Details

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