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Salaries and social security expenses (Tables)
 12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
Schedule of Salaries and Social Security Expenses
 202020192018
Wages and salaries (i)89,662 104,400 105,931 
Social security costs27,430 30,888 29,865 
Equity-settled share-based compensation4,316 4,734 4,728 
 121,408 140,022 140,524 
(i)Includes US$ 27,544, US$ 32,714 and US$ 32,636, capitalized in Property, Plant and Equipment for the years 2020, 2019 and 2018, respectively.