5. Risk Management (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Risk Management Details Narrative
Total exposure	R$ 5,702,375	R$ 5,692,984
Financial instrument assets from related parties	815,160	871,709
Effects on profit for the year before taxes	87,133	86,910
Effects on results before taxes	R$ 570,238	R$ 569,298
Leverage ratio	36.00%	40.00%
Financial instrument assets receivables from related parties	R$ 815,160	R$ 871,709
Reimbursement of additional retirement and pension plan	R$ 709,208	R$ 788,180

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 35K
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35K_a&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 36
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_36_a&doctype=Standard&book=B
-URIDate 2017-03-09

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