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Commitments and contingencies: Additional information (Details) $ in Thousands, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 21, 2019 MXN ($) | Mar. 21, 2015 MXN ($) | Mar. 21, 2015 USD ($) | Jun. 30, 2021 MXN ($) | Dec. 31, 2021 MXN ($) room | Dec. 31, 2020 MXN ($) | Aug. 19, 2020 MXN ($)
Commitments and contingencies: |  |  |  |  |  |  |
Contingent rents recognised as expense |  | $ 573 | $ 28 |  |  |  |
Leasing |  |  |  |  | $ 6,467 | $ 6,304 |
Number of hotel rooms | room |  |  |  |  | 450 |  |
Proceeds from resale of land |  |  |  | $ 286,283 |  |  |
Percentage of amortization of concessionaries per year |  |  |  |  | 15.00% |  |
Estimated financial effect | $ 73,000 |  |  |  |  |  |
Period that Amparo proceedings will resolve | 2 years |  |  |  |  |  |
Deferment investments |  |  |  |  |  |  | $ 2,292,355
Land in Huatulco |  |  |  |  |  |  |
Commitments and contingencies: |  |  |  |  |  |  |
Proceeds from resale of land |  |  |  |  | $ 286,283 |  |
Aeropuerto de Cancun, S. A. de C. V. |  |  |  |  |  |  |
Commitments and contingencies: |  |  |  |  |  |  |
Estimated financial effect |  |  |  |  | 865,000 |  |
Aeropuerto de Cancun, S. A. de C. V. | Legal proceedings contingent liability |  |  |  |  |  |  |
Commitments and contingencies: |  |  |  |  |  |  |
Legal proceedings provision |  |  |  |  | $ 116,000 |  |

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