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Related Parties - Restricted Stock Program (Detail) R$ / shares in Units, R$ in Thousands | 12 Months Ended
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Dec. 31, 2019 BRL (R$) R$ / shares
Summary of related parties [line items] |
Balance of number of shares granted | 1,738,660
Total grant costs, including taxes | R$ 70,243
Accumulated recognized grant costs | (19,742)
Accumulated unrecognized grant costs | R$ 50,501
Restricted program [member] |
Summary of related parties [line items] |
Grant date | Oct. 01, 2017
Balance of number of shares granted | 240,000
Vesting period | 2023
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 38.19
Total grant costs, including taxes | R$ 12,642
Accumulated recognized grant costs | (4,741)
Accumulated unrecognized grant costs | R$ 7,901
Restricted And Performance Program [member] |
Summary of related parties [line items] |
Grant date | Nov. 08, 2017
Balance of number of shares granted | 75,876
Vesting period | 2020 to 2022
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 38.19
Total grant costs, including taxes | R$ 5,014
Accumulated recognized grant costs | (2,850)
Accumulated unrecognized grant costs | R$ 2,164
Restricted And Performance Program [member] |
Summary of related parties [line items] |
Grant date | Apr. 04, 2018
Balance of number of shares granted | 184,076
Vesting period | 2021 to 2023
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 34.35
Total grant costs, including taxes | R$ 12,066
Accumulated recognized grant costs | (5,539)
Accumulated unrecognized grant costs | R$ 6,527
Restricted program [member] |
Summary of related parties [line items] |
Grant date | Sep. 19, 2018
Balance of number of shares granted | 160,000
Vesting period | 2024
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 19.58
Total grant costs, including taxes | R$ 4,321
Accumulated recognized grant costs | (900)
Accumulated unrecognized grant costs | R$ 3,421
Restricted program [member] |
Summary of related parties [line items] |
Grant date | Sep. 24, 2018
Balance of number of shares granted | 80,000
Vesting period | 2024
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 18.40
Total grant costs, including taxes | R$ 2,030
Accumulated recognized grant costs | (423)
Accumulated unrecognized grant costs | R$ 1,607
Restricted And Performance Program [member] |
Summary of related parties [line items] |
Grant date | Apr. 03, 2019
Balance of number of shares granted | 558,708
Vesting period | 2022 to 2024
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 23.25
Total grant costs, including taxes | R$ 24,096
Accumulated recognized grant costs | (4,729)
Accumulated unrecognized grant costs | R$ 19,367
Restricted program [member] |
Summary of related parties [line items] |
Grant date | Sep. 02, 2019
Balance of number of shares granted | 440,000
Vesting period | 2025
Market price of shares on the grant date (in R$ per share) | R$ / shares | R$ 16.42
Total grant costs, including taxes | R$ 10,074
Accumulated recognized grant costs | (560)
Accumulated unrecognized grant costs | R$ 9,514

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