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8. Related Parties (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	R$ 50,307	R$ 51,542	R$ 49,123
Short Term Compensation
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	45,477	40,306	37,759
Stock Compensation
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	1,399	5,427	6,126
Post Employment Benefits
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	1,096	3,336	2,936
Termination Benefit
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	8,794
Long Term Compensation
SummaryOfRelatedPartiesLineItems [Line Items]
Compensation expense of key executives	R$ (6,459)	R$ 2,473	R$ 2,302

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No definition available.

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- Definition

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2016-01-13
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2016-03-30&anchor=para_17&doctype=Standard
-URIDate 2016-03-31

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