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26. EMPLOYEE BENEFITS (Details Narrative) R$ in Thousands	12 Months Ended
26. EMPLOYEE BENEFITS (Details Narrative) R$ in Thousands	Dec. 31, 2017 BRL (R$) Participants	Dec. 31, 2016 BRL (R$) Participants	Dec. 31, 2015 BRL (R$)
Disclosure of defined benefit plans [line items]
Total participants	35,176	34,051
Pension plan expense \| R$	R$ 41,544	R$ 35,798	R$ 35,539
Active contributors
Disclosure of defined benefit plans [line items]
Total participants	20,734	19,442
Retired employees
Disclosure of defined benefit plans [line items]
Total participants	13,587	13,783
Related beneficiaries
Disclosure of defined benefit plans [line items]
Total participants	855	826