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Description of the business and summary of significant accounting policies - Revenue recognition and financial instruments (Details)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Dec. 31, 2015
MXN ($)
Non-ticket revenues        
Air travel-related services   $ 6,293,747 $ 5,055,836 $ 3,418,654
Non-air travel-related services   589,338 494,864 441,393
Cargo   170,973 171,621 189,292
Total non-ticket revenues $ 357,431 7,054,058 5,722,321 4,049,339
Impairment on accounts receivable   $ 4,720 $ 9,164 $ 8,825