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Note 11 - Accumulated Other Comprehensive Loss - Schedule of Reclassifications of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]          
Cost of sales       $ (213) $ (255)
Tax (expense) benefit       41 95
Net loss       (172) (160)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]          
Tax (expense) benefit       (14) (55)
Net loss       24 92
Net Sales       39 148
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Hedge Ineffectiveness [Member]          
Net Sales       (1) (1)
Reclassification out of Accumulated Other Comprehensive Income [Member]          
Net loss       (148) (68)
Cost of sales $ (38,965) $ (54,846)   (122,553) (192,259)
Tax (expense) benefit 2,898 5,930   3,561 8,642
Net loss 727 (1,515)   (15,097) (15,695)
Net Sales $ 41,088 $ 52,335 $ 52,335 $ 117,077 $ 191,046