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Note 23 - Current Allowances and Provisions - Deducted From Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Allowance for doubtful accounts - trade receivables [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year $ (66,535) $ (78,385)
Translation differences 9 329
Increase due to business combinations (1,788)  
Additional / reversals allowances 16,256  
Used 3,276 6,849
Effect of adoption of new standards   6,423
Additional allowances   (1,751)
Values at the end of the year (48,782) (66,535)
Allowance for other doubtful accounts - other receivables [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year (6,784) (6,255)
Translation differences 88 359
Increase due to business combinations  
Additional / reversals allowances 1,239  
Used 565 291
Effect of adoption of new standards  
Additional allowances   (1,179)
Values at the end of the year (4,892) (6,784)
Allowance for inventory obsolescence [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year (209,796) (216,068)
Translation differences 794 3,575
Increase due to business combinations (10,761)  
Additional / reversals allowances (29,138)  
Used 31,184 28,154
Effect of adoption of new standards  
Additional allowances   (25,457)
Values at the end of the year $ (217,717) $ (209,796)