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Risks and Financial Instruments - Summary the position of hedging instruments (Detail)
R$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
BRL (R$)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
BRL (R$)
Dec. 31, 2020
USD ($)
Disclosure of detailed information about financial instruments [line items]        
Notional amount | $   $ 90,000   $ 90,000
Designated as hedge accounting [member]        
Disclosure of detailed information about financial instruments [line items]        
Fair value R$ 486,270   R$ 599,710  
Designated as hedge accounting [member] | Foreign exchange swap [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets USD + 4.65 %      
Rates agreement-liabilities 104.87% DI      
Final maturity sep-23      
Notional amount | $   125,000   185,000
Fair value R$ 212,510   298,889  
Designated as hedge accounting [member] | Foreign exchange swap one [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets USD + LIBOR-3M + 1.14%      
Rates agreement-liabilities 105.00% DI      
Final maturity jun-22      
Notional amount | $   50,000   50,000
Fair value R$ 109,332   94,782  
Designated as hedge accounting [member] | Interest rate swap contract [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets 4.59% + IPCA      
Rates agreement-liabilities 102.00% DI      
Final maturity sep-28      
Notional amount R$ 2,266,054   806,054  
Fair value R$ 166,468   203,837  
Designated as hedge accounting [member] | Interest rate swap contract one [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets 6.47%      
Rates agreement-liabilities 99.94% DI      
Final maturity nov-24      
Notional amount R$ 90,000   90,000  
Fair value R$ (9,044)   3,498  
Designated as hedge accounting [member] | Term [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets BRL      
Rates agreement-liabilities Heating Oil      
Final maturity jan-22      
Notional amount | $   120,260   42,399
Fair value R$ 1,302   (563)  
Designated as hedge accounting [member] | NDF [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets BRL      
Rates agreement-liabilities USD      
Final maturity jan-22      
Notional amount | $   68,361   23,124
Fair value R$ 5,702   (733)  
Not designated as hedge accounting [member]        
Disclosure of detailed information about financial instruments [line items]        
Fair value R$ (123,289)   407,103  
Not designated as hedge accounting [member] | Foreign exchange swap [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets USD + 0.18%      
Rates agreement-liabilities 55.5% DI      
Final maturity      
Notional amount | $     320,000
Fair value   519,260  
Not designated as hedge accounting [member] | Interest rate swap contract [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets 2.67%      
Rates agreement-liabilities 100% DI      
Final maturity      
Notional amount   1,300,000  
Fair value   (5)  
Not designated as hedge accounting [member] | Interest rate swap contract one [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets 5.25%      
Rates agreement-liabilities DI - 1.36%      
Final maturity jun-29      
Notional amount R$ 300,000 [1] 300,000  
Fair value R$ (126,752)    
Not designated as hedge accounting [member] | NDF [member]        
Disclosure of detailed information about financial instruments [line items]        
Rates agreement-assets USD      
Rates agreement-liabilities BRL      
Final maturity jun-22      
Notional amount | $   $ 625,762   $ 378,550
Fair value R$ 3,463   R$ (112,152)  
[1] Currency as indicated.