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Note 5 - Accumulated Other Comprehensive Loss (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | $ (412) | $ 1,829
Other Comprehensive Income (Loss) before Reclassifications, Tax | (139) | 724
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 941 | 1,228
Reclassification from AOCI, Current Period, Tax | 346 | 452
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 876 | (1,574)
Other Comprehensive Income (Loss) before Reclassifications, Tax | $ 341 | $ (609)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + 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=66004124&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=65896914&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=66004124&loc=d3e640-108580 + Details
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