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Note 7 - Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) as Reported in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Balance	$ 314,390
Balance	302,888
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Current period credit	1,864	$ 1,246
Income tax expense
Balance	(6,978)	(7,811)
Balance	(8,842)	(9,057)
Reclassification adjustments
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Current period credit
Income tax expense	(1,449)	(220)
Balance	(9,067)	(12,876)
Balance	(11,623)	(13,358)
Reclassification adjustments	4,005	702
AOCI Attributable to Parent [Member]
Current period credit	1,864	1,246
Income tax expense	(1,449)	(220)
Balance	(16,045)	(20,687)
Balance	(20,465)	(22,415)
Reclassification adjustments	$ 4,005	$ 702

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- Definition

Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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