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Financial Risk Management - Summary of Sensitivity Analysis of the Company Financial Assets and Liabilities (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2020
MXN ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets   $ 498,845    
Financial liabilities $ (952,912) (293,816) $ (735,729) $ (730,361)
Net liability position   205,029    
Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (1,172,044) 25,369 (1,215,264) (1,181,049)
Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities   (268,447)    
Cash and Cash Equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 14,444,549 489,939 7,500,193 6,151,457
Trade Accounts Receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 1,266,005 $ 8,906 $ 1,479,410 $ 1,395,362
Peso amounts at exchange rate of Ps. 19.7354 [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 9,951,310      
Financial liabilities 5,861,243      
Net liability position 4,090,067      
Peso amounts at exchange rate of Ps. 19.7354 [Member] | Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities 506,077      
Peso amounts at exchange rate of Ps. 19.7354 [Member] | Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (5,355,166)      
Peso amounts at exchange rate of Ps. 19.7354 [Member] | Cash and Cash Equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 9,773,654      
Peso amounts at exchange rate of Ps. 19.7354 [Member] | Trade Accounts Receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 177,656      
Exchange rate would depreciate 10% [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 9,046,646      
Financial liabilities (5,328,402)      
Net liability position 3,718,244      
Exchange rate would depreciate 10% [Member] | Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities 460,070      
Exchange rate would depreciate 10% [Member] | Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (4,868,332)      
Exchange rate would depreciate 10% [Member] | Cash and Cash Equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 8,885,140      
Exchange rate would depreciate 10% [Member] | Trade Accounts Receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 161,506      
Exchange rate would appreciate 10% [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 10,946,441      
Financial liabilities 6,447,367      
Net liability position 4,499,074      
Exchange rate would appreciate 10% [Member] | Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities 556,685      
Exchange rate would appreciate 10% [Member] | Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (5,890,682)      
Exchange rate would appreciate 10% [Member] | Cash and Cash Equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 10,751,019      
Exchange rate would appreciate 10% [Member] | Trade Accounts Receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets $ 195,422