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Note 24 - Current allowances and provisions - Deducted From Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts - trade receivables [member]    
Disclosure of other provisions [line items]    
Values at the beginning of the year $ (48,782) $ (66,535)
Translation differences (37) 9
Increase due to business combinations (1,930) (1,788)
(Additional) / reversals allowances   16,256
Used 1,717 3,276
(Additional) allowances (4,644)  
Values at the end of the year (53,676) (48,782)
Allowance for other doubtful accounts - other receivables [member]    
Disclosure of other provisions [line items]    
Values at the beginning of the year (4,892) (6,784)
Translation differences 801 88
Increase due to business combinations
(Additional) / reversals allowances   1,239
Used 1,437 565
(Additional) allowances (1,263)  
Values at the end of the year (3,917) (4,892)
Allowance for inventory obsolescence [member]    
Disclosure of other provisions [line items]    
Values at the beginning of the year (217,717) (209,796)
Translation differences 1,560 794
Increase due to business combinations (76,776) (10,761)
(Additional) / reversals allowances   (29,138)
Used 65,107 31,184
(Additional) allowances (35,809)  
Values at the end of the year $ (263,635) $ (217,717)