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Note 5 - Accumulated Other Comprehensive Loss (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |
OCI, before Reclassifications, before Tax, Attributable to Parent | $ 1,829 | $ (14,614)
Other Comprehensive Income (Loss) before Reclassifications, Tax | 724 | (5,692)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | (1,228) | (106)
Reclassification from AOCI, Current Period, Tax | (452) | (34)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |
OCI, before Reclassifications, before Tax, Attributable to Parent | (1,574) | (2,279)
Other Comprehensive Income (Loss) before Reclassifications, Tax | $ (609) | $ (859)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e39076-109324 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 + Details
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