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Equity - Balance and Changes in Cumulative Translation Adjustments (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of changes in equity [abstract]      
Beginning Balance R$ 65,857 R$ 53,061 R$ 7,519
Translation of foreign subsidiaries, net of IRPJ and CSLL     45,542
Currency translation of foreign subsidiaries 46,330 52,531  
Effect of foreign currency exchange rate variation on financial instruments (14,788) (60,204)  
IRPJ and CSLL on exchange variation 5,028 20,469  
Ending Balance R$ 102,427 R$ 65,857 R$ 53,061