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Trade Accounts Receivables - Movement in the Allowance for Expected Credit Losses of Trade Receivables (Detail) - Trade receivables [member] - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Trade Accounts Receivable [line items]    
Beginning balance R$ 7,745 R$ 5,048
Charge for the year 35,695 12,257
Reversal (3,179) (3,051)
Write-off (16,605) (6,509)
Ending balance R$ 23,656 R$ 7,745