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Costs and expenses by nature: Additional information (Details) $ in Thousands, $ in Thousands |  | 12 Months Ended
--- | --- | ---
May 12, 2020 USD ($) | May 12, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Disclosure of geographical areas [line items] |  |  |  |  |  |
Right of use of assets under concession |  |  |  | $ 535,379 | $ 986,850 | $ 898,253
Short term benefits |  |  |  | 1,039,883 | 1,199,217 | 1,118,926
Maintenance and preservation |  |  |  | 447,884 | 699,557 | 673,603
Mexico |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |
Right of use of assets under concession |  |  |  | 254,337 | 484,402 | 458,290
Colombia (Airplan) |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |
Right of use of assets under concession |  |  |  | $ 149,602 | 361,029 | $ 312,244
Percentage of revenue |  |  | 19.00% | 19.00% |  | 19.00%
Puerto Rico (Aerostar) |  |  |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |  |  |
Right of use of assets under concession |  |  |  | $ 131,440 | $ 141,419 | $ 127,719
Percentage of revenue |  |  |  |  |  | 5.00%
Amount of grant offer | $ 33,417 | $ 717,590 | $ 33,417 | 717,590 |  |
Amount of subsidy received for reimbursements of invoices | $ 17,125 | $ 367,752 | $ 17,125 | $ 367,752 |  |
Number of years fund usage | 4 years | 4 years |  |  |  |
Pertinent expense, net |  | $ 339,681 |  |  |  |
Short term benefits |  | 165,894 |  |  |  |
Amortization of insurance and bonding |  | 142,274 |  |  |  |
Amortization of others |  | 23,650 |  |  |  |
Maintenance and preservation |  | $ 7,863 |  |  |  |

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