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17. Taxes recoverable/payable (Tables)
 12 Months Ended
Dec. 31, 2017
Taxes Recoverablepayable Tables  
Current tax assets
  December 31, 2017 December 31, 2016
Recoverable taxes    
Income tax and social contribution 270,614 32,365
Withholding income tax (IRRF) on financial investments 2,606 7,057
Other federal taxes 3,365 2,961
Other municipal taxes -  250 
Total 276,585  42,633 
Current tax liabilities
  December 31, 2017 December 31, 2016
Taxes and contributions payable    
Cofins and Pasep 74,034 49,132
INSS (Social Security contribution) 35,365 35,376
IRRF (withholding income tax) 58,204 62,771
Other 16,362 21,478
Total 183,965 168,757