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Financial assets and liabilities - Financial assets (Details)
$ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Financial assets        
Total financial assets   $ 136,262 $ 62,440 $ 497,403
Current $ 7,088 133,567 62,440 497,403
Non-current $ 143 2,695    
Jet fuel Asian call options        
Financial assets        
Total financial assets     48,199 $ 497,403
Jet fuel Zero-Cost collars        
Financial assets        
Total financial assets   133,567    
Foreign currency forward contract        
Financial assets        
Total financial assets     $ 14,241  
Interest rate cap        
Financial assets        
Total financial assets   $ 2,695