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Earnings per share (Details 1) - BRL (R$) R$ / shares in Units, shares in Thousands, R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per share [Abstract]
Profit attributable to owners of the Company	R$ 478,781	R$ 127,186	R$ 35,084
Weighted average number of common shares	262,288,607	262,288,607	262,288,607
Basic and diluted earnings per share - in reais	R$ 1.8254	R$ 0.4849	R$ 0.1338

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- Definition

The amount of earnings per share when the basic and diluted measurements are equal. [Refer: Basic earnings (loss) per share; Diluted earnings (loss) per share]

+ References

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- Definition

The profit (loss) attributable to owners of the parent. [Refer: Profit (loss)]

+ References

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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

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