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Trade receivables - Net (Schedule of Age of Receivables Past Due) (Details) - MXN ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets that are either past due or impaired [line items]    
Total $ 936,793 $ 467,377
Trade receivables [Member] | 30 - 60 days [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Total 279,048 221,996
Trade receivables [Member] | 61 - 90 days [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Total 121,790 57,119
Trade receivables [Member] | 91 + days [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Total $ 535,955 $ 188,262