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Trade Accounts Receivable - Summary of Past Due Balances of Accounts Receivable (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Less than 1 month [Member]      
Disclosure Of Trade Accounts Receivable [Line Items]      
Accounts receivable $ 45,895 $ 28,477 $ 52,833
Accounts receivables past due 31 to 60 days [Member]      
Disclosure Of Trade Accounts Receivable [Line Items]      
Accounts receivable 11,588 7,225 8,290
Accounts receivables past due 61 to 90 days [Member]      
Disclosure Of Trade Accounts Receivable [Line Items]      
Accounts receivable 5,966 6,300 4,292
Accounts receivables past due more than 90 days [Member]      
Disclosure Of Trade Accounts Receivable [Line Items]      
Accounts receivable 207 510 1,834
Aggregate past due [Member]      
Disclosure Of Trade Accounts Receivable [Line Items]      
Accounts receivable $ 63,656 $ 42,512 $ 67,249