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Related Parties - Summary of Shares granted (Detail)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Dec. 31, 2021
BRL (R$)
shares
R$ / shares
Disclosure of transactions between related parties [line items]  
Balance of number of shares granted | shares 4,415,294
Total grant costs, including taxes R$ 118,364
Accumulated recognized grant costs (50,603)
Accumulated unrecognized grant costs R$ 67,761
Management  
Disclosure of transactions between related parties [line items]  
Balance of number of shares granted | shares 133,332
Total grant costs, including taxes R$ 34,581
Accumulated recognized grant costs (33,996)
Accumulated unrecognized grant costs R$ 585
Deferred stock plan [member] | Grant Date March 4 2016 [member] | Management  
Disclosure of transactions between related parties [line items]  
Grant date March 4, 2016
Balance of number of shares granted | shares 133,332
Vesting period 2022 to 2023
Market price of shares on the grant date | R$ / shares R$ 32.72
Total grant costs, including taxes R$ 9,025
Accumulated recognized grant costs (8,440)
Accumulated unrecognized grant costs R$ 585
Deferred stock plan [member] | Grant Date December 10 2014 [member] | Management  
Disclosure of transactions between related parties [line items]  
Grant date December 10, 2014
Balance of number of shares granted | shares 0
Vesting period 2021
Market price of shares on the grant date | R$ / shares R$ 25.32
Total grant costs, including taxes R$ 19,557
Accumulated recognized grant costs (19,557)
Accumulated unrecognized grant costs R$ 0
Deferred stock plan [member] | Grant Date March 5 2014 [member] | Management  
Disclosure of transactions between related parties [line items]  
Grant date March 5, 2014
Balance of number of shares granted | shares 0
Vesting period 2021
Market price of shares on the grant date | R$ / shares R$ 26.08
Total grant costs, including taxes R$ 5,999
Accumulated recognized grant costs (5,999)
Accumulated unrecognized grant costs R$ 0