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30 Equity (Details 3) - BRL (R$) R$ / shares in Units, R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Basic and diluted numerator |  |  |
Basic and diluted earnings | R$ 1,989,946 | R$ 1,407,063 | R$ 1,033,626
Basic and diluted denominator |  |  |
Weighted average of shares | 273,655,375 | 273,655,375 | 273,655,375
Common Shares [Member] |  |  |
Basic and diluted numerator |  |  |
Basic and diluted earnings | R$ 1,007,014 | R$ 712,234 | R$ 523,206
Basic and diluted denominator |  |  |
Weighted average of shares | 145,031,080 | 145,031,080 | 145,031,080
Basic and diluted earnings per share attributable to shareholders of parent company | R$ 6.94344 | R$ 4.91091 | R$ 3.60754
Class "A" Preferred [Member] |  |  |
Basic and diluted numerator |  |  |
Basic and diluted earnings | R$ 2,984 | R$ 1,775 | R$ 1,304
Basic and diluted denominator |  |  |
Weighted average of shares | 327,368 | 328,627 | 328,627
Basic and diluted earnings per share attributable to shareholders of parent company | R$ 9.11525 | R$ 5.40201 | R$ 3.9683
Class "B" Preferred [Member] |  |  |
Basic and diluted numerator |  |  |
Basic and diluted earnings | R$ 979,948 | R$ 693,054 | R$ 509,116
Basic and diluted denominator |  |  |
Weighted average of shares | 128,296,927 | 128,295,668 | 128,295,668
Basic and diluted earnings per share attributable to shareholders of parent company | R$ 7.63812 | R$ 5.40201 | R$ 3.96830

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