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Note 3 - Selling, General and Administrative Expenses (Tables)
 12 Months Ended
Dec. 31, 2018
Statement Line Items [Line Items]  
Disclosure of detailed information about selling, general and administrative expenses [text block]
    Year ended December 31,  
(all amounts in thousands of U.S. dollars)   2018     2017     2016  
                   
Services and fees    
128,090
      
132,301
      
123,653
  
Labor cost    
470,928
      
443,338
      
441,355
  
Depreciation of property, plant and equipment    
16,968
      
17,979
      
16,965
  
Amortization of intangible assets    
206,672
      
188,550
      
241,238
  
Commissions, freight and other selling expenses    
491,555
      
339,759
      
243,401
  
Provisions for contingencies    
23,498
      
17,664
      
30,841
  
Allowances for doubtful accounts    
1,751
      
(5,421
 )    
(12,573
 )
Taxes    
71,110
      
56,826
      
67,724
  
Other    
99,404
      
81,061
      
76,563
  
     
1,509,976
      
1,272,057
      
1,229,167
  
From discontinued operations    
-
      
(2,041
 )    
(32,238
 )
     
1,509,976
      
1,270,016
      
1,196,929