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5. FINANCIAL INVESTMENTS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of fair value measurement of assets [line items]
Financial Investments	R$ 895,713	R$ 735,712
CDB - Bank deposit certificate
Disclosure of fair value measurement of assets [line items]
Financial Investments	882,376	716,218
Government securities
Disclosure of fair value measurement of assets [line items]
Financial Investments	R$ 13,337	R$ 19,494

X

- Definition

The amount of current investments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

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+ References

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