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17. Taxes recoverable/payable (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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SummaryOfTaxesRecoverablePayableLineItems [Line Items] |  |
Current tax liabilities | R$ 183,965 | R$ 168,757
Cofins and Pasep |  |
SummaryOfTaxesRecoverablePayableLineItems [Line Items] |  |
Current tax liabilities | 74,034 | 49,132
INSS (Social Security contribution) |  |
SummaryOfTaxesRecoverablePayableLineItems [Line Items] |  |
Current tax liabilities | 35,365 | 35,376
IRRF (Withholding income tax on financial investments) |  |
SummaryOfTaxesRecoverablePayableLineItems [Line Items] |  |
Current tax liabilities | 58,204 | 62,771
Other |  |
SummaryOfTaxesRecoverablePayableLineItems [Line Items] |  |
Current tax liabilities | R$ 16,362 | R$ 21,478

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- Definition The amount of payment due on social security and taxes other than income tax. Income taxes include all domestic and foreign taxes that are based on taxable profits. Income taxes also include taxes, such as withholding taxes, that are payable by a subsidiary, associate or joint arrangement on distributions to the reporting entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78&doctype=Standard -URIDate 2017-03-09 + Details
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