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Accounts receivable - Net: (Details 1) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current trade receivables $ 685,502 $ 464,872  
Allowance account for credit losses of financial assets (127,711)    
Allowance account for credit losses of financial assets (173,398) (127,711)  
Trade receivables [member]      
Current trade receivables 173,398 127,711  
Allowance account for credit losses of financial assets 127,711 128,221 $ 130,185
Allowance account for credit losses of financial assets 173,398 127,711 128,221
Utilisation, allowance account for credit losses of financial assets 36,621 (510) $ (1,964)
Additional allowance recognised in profit or loss, allowance account for credit losses of financial assets 6,690    
Trade receivables [member] | Airplan [Member]      
Additional allowance recognised in profit or loss, allowance account for credit losses of financial assets 2,376    
Trade receivables [member] | Financial assets past due but not impaired [member]      
Current trade receivables 192,805 71,317  
Trade receivables [member] | Not later than one month [member]      
Current trade receivables 137,155 51,820  
Trade receivables [member] | Later than three months and not later than six months [member]      
Current trade receivables 71,049 592  
Trade receivables [member] | Later than six months and not later than one year [member]      
Current trade receivables 157,999 146,616  
Trade receivables [member] | Current [member]      
Current trade receivables $ 366,203 $ 199,028