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Cash and cash equivalents
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Cash and cash equivalents
Cash and cash equivalents
 
2018
 
2017
Cash at bank and on hand
197,544

 
118,358

Short-term bank deposits
76,091

 
150,837

 
273,635

 
269,195