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Finance income and cost (Details)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Analysis of finance income        
Interest on cash and equivalents   $ 58,269 $ 93,122 $ 201,191
Interest on asset backed trust notes   5,714 6,342 6,525
Interest on recovery of guarantee deposits   7,595 2,047 83
Total finance income $ 3,477 71,578 101,511 207,799
Analysis of finance cost        
Leases financial cost   2,603,820 2,350,250 2,128,162
Financial instruments loss     448,559  
Interest on asset backed trust notes   115,578 116,240 80,314
Cost of letter credit notes   61,549 73,141 49,856
Interest on debts and borrowings   14,222 16,368 1,660
Bank fees and others   4,574 3,707 3,607
Other finance costs   32,246 10,219 6,230
Total finance costs $ 137,585 2,831,989 3,018,484 2,269,829
Capitalized borrowing costs        
Interest on debts and borrowings   158,188 400,406 457,973
Capitalized interest   (143,966) (384,038) (456,313)
Interest on debts and borrowing in the consolidated statements of operations   $ 14,222 $ 16,368 $ 1,660