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Accounts payable and accrued expenses (Details) - MXN ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounts payable and accrued expenses:    
Suppliers $ 353,885 $ 245,100
Taxes payable 57,174 175,573
Use rights of assets under concession 5,070 269,916
Accounts payable to related parties (Note 14.1) 53,256 97,312
Lease payable (Note 7.1) 17,236 20,422
Salaries payable 128,105 149,452
Sundry creditors for services provided 640,068 803,746
Accounts payable to contractors 343,610 37,809
Accounts payable and accrued expenses $ 1,598,404 $ 1,799,330