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Salaries and social security expenses
 12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Salaries and social security expenses
Salaries and social security expenses
 
2018
 
2017
 
2016
Wages and salaries (i)
105,931

 
132,025

 
117,423

Social security costs
29,865

 
30,558

 
28,849

Equity-settled share-based compensation
4,728

 
5,552

 
4,796

 
140,524

 
168,135

 
151,068


(i)
Includes US$ 32,636, US$ 41,172 and US$ 28,475, capitalized in Property, Plant and Equipment for the years 2018, 2017 and 2016, respectively.