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Accrued liabilities - Long-term (Details)
$ in Thousands, $ in Thousands
Dec. 31, 2018
USD ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Accrued liabilities        
Aircraft and engine lease extension benefit   $ 61,730 $ 107,400 $ 127,831
Supplier services agreement   66,539 77,174 4,350
Depositary services benefit       1,473
Other   8,964 15,274 36,154
Total long-term accrued liabilities $ 6,972 $ 137,233 $ 199,848 $ 169,808