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16. TAX INSTALLMENTS PROGRAMS (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of fair value measurement of liabilities [line items] |  |
REFIS debts and other tax installment payment plans, current | R$ 20,179 | R$ 21,551
REFIS debts and other tax installment payment plans, noncurrent | 73,934 | 79,242
Federal REFIS Law 11.941/09 |  |
Disclosure of fair value measurement of liabilities [line items] |  |
REFIS debts and other tax installment payment plans, current | 12,100 | 12,552
REFIS debts and other tax installment payment plans, noncurrent | 18,895 | 20,083
Federal REFIS Law 12.865/13 |  |
Disclosure of fair value measurement of liabilities [line items] |  |
REFIS debts and other tax installment payment plans, current | 6,240 | 5,984
REFIS debts and other tax installment payment plans, noncurrent | 52,661 | 56,381
Other taxes in installments |  |
Disclosure of fair value measurement of liabilities [line items] |  |
REFIS debts and other tax installment payment plans, current | 1,839 | 3,015
REFIS debts and other tax installment payment plans, noncurrent | R$ 2,378 | R$ 2,778

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