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Accounts receivable - Net: (Details 2) - MXN ($) $ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Expected credit loss rate | 15.00% |  | 15.00%
Trade receivables | $ 991,033 | $ 191,682 | $ 858,900
Allowance account for credit losses of financial assets | 179,639 |  | $ 173,398
Mexico City [Member] |  |  |
Trade receivables | 131,248 | 164,332 |
Allowance account for credit losses of financial assets | 129,299 | 164,332 |
Aerostar [Member] |  |  |
Trade receivables | 246,647 | 221,285 |
Allowance account for credit losses of financial assets | 43,073 | 22,958 |
Airplan [Member] |  |  |
Trade receivables | 188,876 | 186,757 |
Allowance account for credit losses of financial assets | 7,265 | 4,391 |
Due To Expire [Member] |  |  |
Trade receivables | $ 386 | 279 |
Due To Expire [Member] | Mexico City [Member] |  |  |
Expected credit loss rate | 0.02% |  |
Trade receivables | $ 93 |  |
Due To Expire [Member] | Aerostar [Member] |  |  |
Expected credit loss rate | 0.25% |  |
Trade receivables | $ 154,235 | 111,731 |
Allowance account for credit losses of financial assets | $ 386 | 279 |
Due To Expire [Member] | Airplan [Member] |  |  |
Expected credit loss rate | 0.88% |  |
1 to 90 [Member] |  |  |
Trade receivables | $ 1,737 | 1,776 |
1 to 90 [Member] | Mexico City [Member] |  |  |
Expected credit loss rate | 0.02% |  |
Trade receivables | $ 604 |  |
1 to 90 [Member] | Aerostar [Member] |  |  |
Expected credit loss rate | 0.25% |  |
Trade receivables | $ 49,645 | 62,764 |
Allowance account for credit losses of financial assets | $ 124 | 158 |
1 to 90 [Member] | Airplan [Member] |  |  |
Expected credit loss rate | 0.88% |  |
Trade receivables | $ 183,223 | 183,985 |
Allowance account for credit losses of financial assets | 1,612 | 1,619 |
91 to 180 [Member] |  |  |
Trade receivables | $ 36 | 4,282 |
91 to 180 [Member] | Mexico City [Member] |  |  |
Expected credit loss rate | 0.02% |  |
Trade receivables | $ 1,252 |  |
91 to 180 [Member] | Aerostar [Member] |  |  |
Expected credit loss rate | 15.00% |  |
Trade receivables | $ 239 | 28,549 |
Allowance account for credit losses of financial assets | $ 36 | 4,282 |
91 to 180 [Member] | Airplan [Member] |  |  |
Expected credit loss rate | 0.88% |  |
181 to 365 [Member] |  |  |
Trade receivables | $ 11,938 | 39,874 |
181 to 365 [Member] | Mexico City [Member] |  |  |
Expected credit loss rate | 100.00% |  |
Trade receivables | $ 495 | 37,102 |
Allowance account for credit losses of financial assets | $ 495 | 37,102 |
181 to 365 [Member] | Aerostar [Member] |  |  |
Expected credit loss rate | 100.00% |  |
Trade receivables | $ 5,790 |  |
Allowance account for credit losses of financial assets | $ 5,790 |  |
181 to 365 [Member] | Airplan [Member] |  |  |
Expected credit loss rate | 100.00% |  |
Trade receivables | $ 5,653 | 2,772 |
Allowance account for credit losses of financial assets | 5,653 | 2,772 |
365 [Member] |  |  |
Trade receivables | $ 165,542 | 145,471 |
365 [Member] | Mexico City [Member] |  |  |
Expected credit loss rate | 100.00% |  |
Trade receivables | $ 128,804 | 127,230 |
Allowance account for credit losses of financial assets | $ 128,804 | 127,230 |
365 [Member] | Aerostar [Member] |  |  |
Expected credit loss rate | 100.00% |  |
Trade receivables | $ 36,738 | 18,240 |
Allowance account for credit losses of financial assets | $ 36,738 | $ 18,240 |
365 [Member] | Airplan [Member] |  |  |
Expected credit loss rate | 100.00% |  |

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