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Related Parties - Summary of Shares granted (Detail) - 12 months ended Dec. 31, 2020 R$ in Thousands | BRL (R$) | $ / shares
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Summary of related parties [line items] |  |
Balance of number of shares granted | 702,260 |
Total grant costs, including taxes | R$ 51,551 |
Accumulated recognized grant costs | (46,753) |
Accumulated unrecognized grant costs | R$ 4,798 |
Sharebased payment arrangements 1 [member] |  |
Summary of related parties [line items] |  |
Grant date | March 4, 2016 |
Balance of number of shares granted | 380,000 |
Vesting period | 2021 to 2023 |
Market price of shares on the grant date | $ / shares |  | $ 32.72
Total grant costs, including taxes | R$ 17,147 |
Accumulated recognized grant costs | (14,076) |
Accumulated unrecognized grant costs | R$ 3,071 |
Sharebased payment arrangements 2 [member] |  |
Summary of related parties [line items] |  |
Grant date | December 10, 2014 |
Balance of number of shares granted | 266,660 |
Vesting period | 2021 |
Market price of shares on the grant date | $ / shares |  | 25.32
Total grant costs, including taxes | R$ 28,405 |
Accumulated recognized grant costs | (26,726) |
Accumulated unrecognized grant costs | R$ 1,679 |
Sharebased payment arrangements 3 [member] |  |
Summary of related parties [line items] |  |
Grant date | March 5, 2014 |
Balance of number of shares granted | 55,600 |
Vesting period | 2021 |
Market price of shares on the grant date | $ / shares |  | $ 26.08
Total grant costs, including taxes | R$ 5,999 |
Accumulated recognized grant costs | (5,951) |
Accumulated unrecognized grant costs | R$ 48 |

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- Definition The description of the vesting requirements for a type of share-based payment arrangement that existed at any time during the period. An entity with substantially similar types of share-based payment arrangements may aggregate this information. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2019-03-27 + Details
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