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Investment property (Tables)
 12 Months Ended
Dec. 31, 2018
Investment property [abstract]  
Disclosure of detailed information about investment property
Changes in the Group’s investment property in 2018 and 2017 were as follows:
 
 
2018
 
2017 (*)
Beginning of the year
42,342

 
44,581

Net gain from fair value adjustment (Note 8)
13,409

 
4,302

Reclassification to property, plant and equipment (i)
(3,313
)
 
—

Exchange difference
(11,713
)
 
(6,541
)
End of the year
40,725

 
42,342

Fair value
40,725

 
42,342

Net book amount
40,725

 
42,342

 
(i)       Relates to new contracts with third parties.