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Balances and transactions with related parties: Additional information (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of transactions between related parties [line items]      
Explanation of nature and extent of renewal and termination options The agreement is for an initial term of 15 years and renews automatically for subsequent five year periods, unless one of the parts issues the other a cancellation notice within a determined term prior to the programmed expiration date. The Company can only exercise its termination right through a resolution of the shareholders    
Explanation of significant terms of service concession arrangement that may affect amount, timing and certainty of future cash flows In accordance with the contract, the Company agreed to pay an annual compensation equivalent to the higher of a fixed amount or 5% of the consolidated income of the Company before deducting the compensation for technical assistance and before the comprehensive financial result, IT, depreciation and amortization, determined in accordance with financial reporting standards applicable in Mexico. Beginning in 2003, the minimum fixed amount is of USD2,000 (approximately Ps.37,700).    
Key management personnel compensation $ 66,083 $ 41,411 $ 53,268
Technical assistance amount 175,615 404,086 386,249
Aerostar and Airplan      
Disclosure of transactions between related parties [line items]      
Key management personnel compensation 15,650 17,381 16,350
Inversiones y Tecnicas Aeroportuarias, S. A. de C. V.      
Disclosure of transactions between related parties [line items]      
Technical assistance amount $ 175,615 $ 404,086 $ 386,249