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Consolidated statements of comprehensive income - BRL (R$)
R$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Profit or loss [abstract]          
Net income for the period R$ 148,456 R$ 60,624 R$ 478,794 R$ 127,779 R$ 35,490
Currency translation adjustment 67 55 55 0 0
Net income for the period 148,523 60,679 478,849 127,779 35,490
Owners of the Company          
Net income for the period 148,445 60,680 478,836 127,186 35,084
Non-controlling interests 78 (1) 13 593 406
Net income for the period R$ 148,523 R$ 60,679 R$ 478,849 R$ 127,779 R$ 35,490