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Employee Benefits and Private Pension Plan - Post-employment benefit expense (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]      
Employee benefit expense R$ 17,521 R$ 20,944 R$ 15,585
Health and dental care plan [member]      
Disclosure of defined benefit plans [line items]      
Employee benefit expense 11,182 14,660 15,265
Indemnification of FGTS [member]      
Disclosure of defined benefit plans [line items]      
Employee benefit expense 4,909 4,766 4,409
Seniority bonus [member]      
Disclosure of defined benefit plans [line items]      
Employee benefit expense 286 563 (4,886)
Life insurance [member]      
Disclosure of defined benefit plans [line items]      
Employee benefit expense R$ 1,144 R$ 955 R$ 797