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Taxes to Recover - Summary of Recoverable Income Tax and Social Contribution Taxes (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2017
Disclosure Of Recoverable Income Tax and Social Contribution Taxes [line items]      
Recoverable and social contribution taxes R$ 362,784 R$ 295,172  
Current 257,182 216,630  
Non-current 105,602 78,542 R$ 35,864
IRPJ and CSLL [member]      
Disclosure Of Recoverable Income Tax and Social Contribution Taxes [line items]      
Recoverable and social contribution taxes R$ 362,784 R$ 295,172