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Financial Risk Management - Summary of Variable Interest Rates to the Company is Exposed had been 100 Basis Points (Higher) or Lower Than the Interest Rate (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Financial Liabilities Variable Rate [Abstract]      
Effect in case of interest rate increase in 100 basis points, Variable rate long term debt $ (121,747) $ (112,134) $ (64,031)
Effect in case of interest rate decrease in 100 basis points, Variable rate long term debt $ 121,747 $ 112,134 $ 64,031