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Gain (loss) on Disposal of Property, Plant and Equipment and Intangibles - Additional information (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Gain loss on disposal of property plant and equipment and intangibles details narrative [abstract]      
Gain (loss) on disposal of property, plant, and equipment R$ (22,088) R$ (2,242) R$ (6,134)