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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, 2018
MXN ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets   $ 197,215    
Financial liabilities $ (730,361)   $ (784,533) $ (693,099)
Net liability position   (63,506)    
Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (1,028,737) (30,274) (1,037,155) (891,611)
Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities   (230,447)    
Cash and cash equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 6,151,457 186,252 7,730,143 5,188,138
Trade receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 1,395,362 $ 10,963 $ 997,370 $ 607,544
Peso amounts at exchange rate of Ps. 19.7354 [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 3,881,773      
Net liability position (1,249,979)      
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 (595,889)      
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 (4,535,862)      
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 3,665,979      
Peso amounts at exchange rate of Ps. 19.7354 [Member] | Trade receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 215,793      
Exchange rate would depreciate 10% [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 3,528,884      
Net liability position (1,136,344)      
Exchange rate would depreciate 10% [Member] | Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (541,717)      
Exchange rate would depreciate 10% [Member] | Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (4,123,511)      
Exchange rate would depreciate 10% [Member] | Cash and cash equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 3,332,708      
Exchange rate would depreciate 10% [Member] | Trade receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 196,176      
Exchange rate would appreciate 10% [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 4,269,950      
Net liability position (1,374,977)      
Exchange rate would appreciate 10% [Member] | Accounts payable [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (655,478)      
Exchange rate would appreciate 10% [Member] | Bank loans [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial liabilities (4,989,449)      
Exchange rate would appreciate 10% [Member] | Cash and cash equivalents [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets 4,032,577      
Exchange rate would appreciate 10% [Member] | Trade receivables [Member]        
Disclosure Of Financial Assets And Liabilities Exchange Rate [Line Items]        
Financial assets $ 237,373