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Note 18 - Trade Receivables, Net - Summary of the Aging of Trade Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets that are either past due or impaired [line items]      
Guaranteed $ 191,514 $ 234,427  
Not guaranteed 830,310 1,162,515  
Guaranteed and not guaranteed $ 1,021,824 $ 1,396,942  
Expected loss rate 0.07% 0.09%  
Allowances for doubtful accounts $ (721) $ (1,294)  
Nominative allowances for doubtful accounts (52,955) (47,488)  
Net Value 968,148 1,348,160 $ 1,737,366
Current trade receivables, not due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Guaranteed 170,796 205,764  
Not guaranteed 655,132 948,449  
Guaranteed and not guaranteed $ 825,928 $ 1,154,213  
Expected loss rate 0.04% 0.04%  
Allowances for doubtful accounts $ (321) $ (529)  
Nominative allowances for doubtful accounts (718)  
Net Value 824,889 1,153,684  
Current trade receivables, past due, less than 180 days [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Guaranteed 18,778 26,899  
Not guaranteed 116,802 157,960  
Guaranteed and not guaranteed $ 135,580 $ 184,859  
Expected loss rate 0.23% 0.24%  
Allowances for doubtful accounts $ (331) $ (455)  
Nominative allowances for doubtful accounts (1,011) (1,922)  
Net Value 134,238 182,482  
Current trade receivables, past due, greater than 180 days [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Guaranteed 1,940 1,764  
Not guaranteed 58,376 56,106  
Guaranteed and not guaranteed $ 60,316 $ 57,870  
Expected loss rate 0.72% 0.57%  
Allowances for doubtful accounts $ (69) $ (310)  
Nominative allowances for doubtful accounts (51,226) (45,566)  
Net Value $ 9,021 $ 11,994