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Equity - Dividends and Allocation of Net Income (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allocation of net income [abstract] |  |  |
Profit (loss), attributable to owners of parent | R$ 893,383 | R$ 373,526 | R$ 1,150,421
Legal reserves | 44,669 |  |
Adjusted Net Income Basis for Dividends | 848,714 |  |
Minimum mandatory dividends | 424,357 |  |
Additional Dividends to Minimum Mandatory Dividends | 55,391 |  |
Allocation of Net Income to Investments Statutory Reserve | 368,966 |  |
Allocation Of Net Income | 893,383 |  |
Allocation Of Dividends [Abstract] |  |  |
Minimum mandatory dividends for the period (50% of the adjusted net income) | 424,357 |  |
Additional dividends to minimum mandatory dividends | 55,391 |  |
Total allocation (R$ 0.44 per share) | R$ 479,748 |  |

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