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Note 16 - Accumulated Other Comprehensive Loss - Schedule of Reclassifications of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cost of sales                 $ (159,481) $ (249,233) $ (362,722)
Associated income tax benefit                 4,756 11,951 (4,651)
Net loss $ 5,834 $ 727 $ (6,242) $ (9,583) $ (13,693) $ (1,515) $ (12,079) $ (2,101) (9,263) (29,388) (17,887)
Net sales $ 39,179 $ 41,088 $ 42,061 $ 33,928 $ 45,562 $ 52,335 $ 53,846 $ 84,865 156,256 236,608 403,298
Reclassification out of Accumulated Other Comprehensive Income [Member]                      
Net loss                 (228) (128) (112)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]                      
Cost of sales                 (392) (352) (182)
Associated income tax benefit                 136 131 68
Net loss                 (256) (221) (114)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]                      
Associated income tax benefit                 (17) (56) (1)
Net loss                 28 93 2
Net sales                 45 147 6
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Hedge Ineffectiveness [Member]                      
Net sales                 $ 2 $ (3)