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Financial risk management: (Details Textual) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Mar. 15, 2019
Borrowings, interest rate basis | London Inter Bank Offered Rate (LIBOR) plus 1.85%) |  |  |
Borrowings, maturity | 2022 |  |  |
Comprehensive income | $ 5,240,557 | $ 6,169,315 | $ 4,028,903 |
Closing foreign exchange rate |  |  |  | 19.33
Foreign exchange gain (loss) | $ 41,100 | 192 |  |
Percentage of entity's revenue | 3.00% |  |  |
Receivables due from related parties | $ 809 | $ 437 |  |
Additional allowance recognised in profit or loss, allowance account for credit losses of financial assets | $ 128,000 |  |  |
Percentage of increase decrease in foreign exchange rate | 5.00% | 10.00% |  |
Mexican Peso [Member] |  |  |  |
Closing foreign exchange rate | 19.65 | 19.66 |  |
Cancun Airport Services, S. A. de C. V. [member] |  |  |  |
Percentage of entity's revenue | 51.07% | 59.09% |  |
Grupo Mexicana [member] |  |  |  |
Receivables due from related parties | $ 128,000 |  |  |
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 |  | 2.59% |  |
Comprehensive income |  | $ 1,476 |  |

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