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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	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Balance	$ 302,888
Balance	306,775
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(8,842)	$ (9,057)
Reclassification adjustments
Current period credit	547	1,500
Income tax expense
Balance	(8,295)	(7,557)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(11,623)	(13,358)
Reclassification adjustments	2,002	351
Current period credit	14	42
Income tax expense	(740)	(143)
Balance	(10,347)	(13,108)
AOCI Attributable to Parent [Member]
Balance	(20,465)	(22,415)
Reclassification adjustments	2,002	351
Current period credit	561	1,542
Income tax expense	(740)	(143)
Balance	$ (18,642)	$ (20,665)

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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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