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21 Loans and Financing (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 3,188,531 | R$ 3,142,383 | R$ 4,047,307
Loans and financing, percent | 100.00% | 100.00% |
Foreign Currency [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 140,337 | R$ 108,983 |
Loans and financing, percent | 4.40% | 3.47% |
Foreign Currency [member] | United States of America, Dollars |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 140,337 | R$ 108,983 |
Loans and financing, percent | 4.40% | 3.47% |
Local Currency [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 3,048,194 | R$ 3,033,400 |
Loans and financing, percent | 95.60% | 96.53% |
Local Currency [member] | TJLP |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 2,090,340 | R$ 2,271,187 |
Loans and financing, percent | 65.58% | 72.30% |
Local Currency [member] | CDI |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 638,431 | R$ 676,720 |
Loans and financing, percent | 20.02% | 21.54% |
Local Currency [member] | TR |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing |  | R$ 2,202 |
Loans and financing, percent |  | 0.07% |
Local Currency [member] | IPCA |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 270,749 | R$ 8,288 |
Loans and financing, percent | 8.49% | 0.26% |
Local Currency [member] | Without indexer (annual fixed rate) |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loans and financing | R$ 48,674 | R$ 75,003 |
Loans and financing, percent | 1.51% | 2.36% |

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