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Related Parties - Summary of Shares granted (Detail) R$ / shares in Units, R$ in Thousands | 12 Months Ended
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Dec. 31, 2017 BRL (R$) R$ / shares
Summary of related parties [line items] |
Balance of number of shares granted | 850,064
Total grant costs, including taxes | R$ 81,434
Accumulated recognized grant costs | (55,904)
Accumulated unrecognized grant costs | R$ 25,530
Sharebased payment arrangements 1 [member] |
Summary of related parties [line items] |
Grant date | Mar. 13, 2017
Balance of number of shares granted | 100,000
Vesting period | 2022 to 2024
Market price of shares on the grant date | R$ / shares | R$ 67,990
Total grant costs, including taxes | R$ 9,378
Accumulated recognized grant costs | (2,920)
Accumulated unrecognized grant costs | R$ 6,458
Sharebased payment arrangements 2 [member] |
Summary of related parties [line items] |
Grant date | Mar. 04, 2016
Balance of number of shares granted | 190,000
Vesting period | 2021 to 2023
Market price of shares on the grant date | R$ / shares | R$ 65,430
Total grant costs, including taxes | R$ 17,147
Accumulated recognized grant costs | (8,252)
Accumulated unrecognized grant costs | R$ 8,895
Sharebased payment arrangements 3 [member] |
Summary of related parties [line items] |
Grant date | Dec. 09, 2014
Balance of number of shares granted | 400,000
Vesting period | 2019 to 2021
Market price of shares on the grant date | R$ / shares | R$ 50,640
Total grant costs, including taxes | R$ 27,939
Accumulated recognized grant costs | (19,376)
Accumulated unrecognized grant costs | R$ 8,563
Sharebased payment arrangements 4 [member] |
Summary of related parties [line items] |
Grant date | Mar. 05, 2014
Balance of number of shares granted | 83,400
Vesting period | 2019 to 2021
Market price of shares on the grant date | R$ / shares | R$ 52,150
Total grant costs, including taxes | R$ 5,999
Accumulated recognized grant costs | (4,925)
Accumulated unrecognized grant costs | R$ 1,074
Sharebased payment arrangements 5 [member] |
Summary of related parties [line items] |
Grant date | Nov. 07, 2012
Balance of number of shares granted | 76,664
Vesting period | 2017 to 2019
Market price of shares on the grant date | R$ / shares | R$ 42,900
Total grant costs, including taxes | R$ 16,139
Accumulated recognized grant costs | (15,599)
Accumulated unrecognized grant costs | R$ 540
Sharebased payment arrangements 6 [member] |
Summary of related parties [line items] |
Grant date | Dec. 14, 2011
Vesting period | 2016 to 2018
Market price of shares on the grant date | R$ / shares | R$ 31,850
Total grant costs, including taxes | R$ 4,832
Accumulated recognized grant costs | R$ (4,832)

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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 2018-01-01 -Paragraph 45 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_a&doctype=Standard -URIDate 2018-03-16 + Details
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