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Note 8 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Unrealized holding gain on securities transferred from held to maturity to available for sale, tax	$ 237		$ 237
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Unrealized holding gain (loss) on available for sale securities, tax			(861)	1,454
Unrealized holding gain on securities transferred from held to maturity to available for sale, tax			237
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Unrealized holding gain (loss) on available for sale securities, tax			0	0
Unrealized holding gain on securities transferred from held to maturity to available for sale, tax			0
AOCI Attributable to Parent [Member]
Unrealized holding gain (loss) on available for sale securities, tax			(861)	$ 1,454
Unrealized holding gain on securities transferred from held to maturity to available for sale, tax			$ 237

X

- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 11
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- Definition

Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) related to transfers of securities into the available-for-sale category and out of the held-to-maturity category.

+ References

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