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Financial risk management: (Details Textual) $ in Thousands, $ in Thousands, $ in Thousands |  |  | 1 Months Ended | 7 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 02, 2017 MXN ($) | Mar. 08, 2017 USD ($) | Mar. 08, 2017 COP ($) | Oct. 19, 2017 MXN ($) | Mar. 17, 2014 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2015 MXN ($) | Apr. 25, 2018 | Sep. 20, 2017
Borrowings, interest rate basis |  |  |  |  |  |  |  | London Inter Bank Offered Rate (LIBOR) plus 1.85% |  |  |  |
Borrowings, maturity |  |  |  |  |  |  |  | 2022 |  |  |  |
Comprehensive income |  |  |  |  |  |  |  | $ 6,169,315 | $ 4,028,903 | $ 3,186,955 |  |
Closing foreign exchange rate |  |  |  |  |  |  |  |  |  |  | 18.28 | 19.66
Foreign exchange gain (loss) |  |  |  |  |  |  |  | 192 | 91 |  |  |
Receivables due from related parties |  |  |  |  |  | $ 437 |  | $ 437 | $ 1,886,546 |  |  |
Percentage of increase decrease in foreign exchange rate |  |  |  |  |  |  |  | 10.00% | 15.00% |  |  |
Expenses due to natural calamities |  |  |  |  |  | 294,900 | $ 15,000 |  |  |  |  |
Loss Contingency, Compensation Sought value |  | $ 135,779 | $ 20,619 |  | $ 1,400 |  |  |  |  |  |  |
Description of annual compensation |  |  |  |  |  |  |  | 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 million (Ps41.2 million pesos). |  |  |  |
Airplan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Key management personnel compensation |  |  |  | $ 3,268 |  |  |  |  |  |  |  |
Aerostar [Member] |  |  |  |  |  |  |  |  |  |  |  |
Comprehensive income |  |  |  |  |  | $ 241,157 |  |  |  |  |  |
Key management personnel compensation | $ 34,879 |  |  |  |  |  |  |  |  |  |  |
Mexican Peso [Member] |  |  |  |  |  |  |  |  |  |  |  |
Closing foreign exchange rate |  |  |  |  |  | 19.66 |  | 19.66 | 20.61 |  |  |
Cancun Airport Services, S. A. de C. V. [member] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of entity's revenue |  |  |  |  |  |  |  | 59.09% | 69.81% | 69.58% |  |
Grupo Mexicana [member] |  |  |  |  |  |  |  |  |  |  |  |
Receivables due from related parties |  |  |  |  |  | $ 128 |  | $ 128 |  |  |  |
Additional allowance recognised in profit or loss, allowance account for credit losses of financial assets |  |  |  |  |  |  |  | $ 128 |  |  |  |
Increase in interest rate [member] | Floating interest rate [member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  |  |  |  |  |  |  | 2.59% |  |  |
Comprehensive income |  |  |  |  |  |  |  |  | $ 1,476 |  |  |
Decrease in interest rate [member] | Floating interest rate [member] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  |  |  |  |  |  |  |  | 4.13% |  |  |
Comprehensive income |  |  |  |  |  |  |  |  | $ 1,659 |  |  |

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