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Note 23 - Current Allowances and Provisions - Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Sales risks [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year $ 13,885 $ 6,290
Translation differences 247 189
Additional provisions 4,238 16,266
Reclassifications (22)
Used (6,974) (8,838)
Values at the end of the year 11,396 13,885
Miscellaneous other provisions [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year 8,871 2,705
Translation differences 227 (86)
Additional provisions 9,432 7,791
Reclassifications 7,591 1,954
Used (5,187) (3,493)
Values at the end of the year 20,934 8,871
Provision for current liabilities [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year 22,756 8,995
Translation differences 474 103
Additional provisions 13,670 24,057
Reclassifications 7,591 1,932
Used (12,161) (12,331)
Values at the end of the year $ 32,330 $ 22,756