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Note 15 - Schedule of Reclassifications of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]      
Cost of sales $ (352) $ (182) $ (372)
Tax (expense) benefit 131 68 133
Net Income (loss) (221) (114) (239)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Tax (expense) benefit (56) (1) (42)
Net Income (loss) 93 2 72
Net sales 147 6 $ 114
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Hedge Ineffectiveness [Member]      
Net sales 2 (3)
Reclassification out of Accumulated Other Comprehensive Income [Member]      
Net Income (loss) (128) (112) $ (167)
Cost of sales (249,233) (362,722) (299,209)
Tax (expense) benefit 11,951 (4,651) (12,358)
Net Income (loss) (29,388) (17,887) (923)
Net sales $ 236,608 $ 403,298 $ 359,445