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Trade Accounts Receivable - Summary of Movements of Bad Debt Expense in Credit Loss (Detail) - Trade Accounts Receivables [Member] - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Trade Accounts Receivable [Line Items]      
Beginning balance $ (48,675) $ (31,528) $ (30,622)
Bad debt expense (22,125) (25,289) (12,006)
Reversal of bad debts 19,778 8,142 11,100
Ending balance $ (51,022) $ (48,675) $ (31,528)