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Financial risk management: (Tables) | 12 Months Ended
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Dec. 31, 2021
Financial risk management: |
Schedule of exchange rate risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2021
Asset | ​ | Ps. | 88,426 | ​ | Ps. | 124,656
Liability |  | ​ | (5,578) | ​ | ​ | (7,580)
Net Monetary Assets |  | Ps. | 82,848 | ​ | Ps. | 117,076
Schedule of liquidity position | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 |  | Cash and equivalents |  | Total Debt |  | Debt term short |  | Debt term long
Mexico | ​ | Ps. | 4,058,495 | ​ | Ps. | 3,971,210 | ​ | Ps. | 322,209 | ​ | Ps. | 3,649,001
Aerostar | ​ | ​ | 804,634 | ​ | ​ | 7,171,278 | ​ | ​ | 529,337 | ​ | ​ | 6,641,941
Airplan | ​ |  | 329,499 | ​ |  | 2,757,858 | ​ | ​ | 287,204 | ​ | ​ | 2,470,654
Total | ​ | Ps. | 5,192,628 | ​ | Ps. | 13,900,346 | ​ | Ps. | 1,138,750 | ​ | Ps. | 12,761,596
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2021 |  | Cash and equivalents |  | Total Debt |  | Debt term short |  | Debt term long
Mexico | ​ | Ps. | 5,700,314 | ​ | Ps. | 4,630,722 | ​ | Ps. | 6,964 | ​ | Ps. | 4,623,758
Aerostar | ​ |  | 2,295,087 | ​ | ​ | 6,952,069 | ​ | ​ | 353,672 | ​ | ​ | 6,598,397
Airplan | ​ |  | 774,661 | ​ | ​ | 2,196,756 | ​ | ​ | 217,508 | ​ | ​ | 1,979,248
Total | ​ | Ps. | 8,770,062 | ​ | Ps. | 13,779,547 | ​ | Ps. | 578,144 | ​ | Ps. | 13,201,403
​
Schedule of liquidity risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Under |  | Between 3 months |  | Between 1 |  | Between 2 and
At December 31, 2020 | ​ | 3 months | ​ | and one year | ​ | and 2 years | ​ | 5 years
Bank loans and interest |  | Ps. | 11,176 |  | Ps. | 797,339 | ​ | Ps. | 2,238,558 | ​ | Ps. | 3,881,097
Long term debt |  |  | 114,420 |  |  | 215,815 | ​ | ​ | 233,123 | ​ | ​ | 6,408,818
Suppliers |  |  | 353,806 |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | ​ | ​ | 1,187,345 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Bank loans and interest | ​ | Ps. | 13,660 | ​ | Ps. | 210,812 | ​ | Ps. | 3,945,092 | ​ | Ps. | 2,305,320
Long term debt | ​ | ​ | 114,009 | ​ | ​ | 239,663 | ​ | ​ | 1,512,848 | ​ | ​ | 5,696,815
Suppliers | ​ | ​ | 290,689 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accounts payable and accrued expenses | ​ | ​ | 1,383,249 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
Schedule of short term liquidity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2021
​ | ​ | ​ | ​ | ​ | ​ | ​
Current assets |  | Ps. | 7,716,049 | ​ | Ps. | 11,662,100
Current liabilities |  |  | 2,767,087 | ​ | ​ | 3,786,398
Short term position (liquidity) |  | Ps. | 4,948,962 | ​ | Ps. | 7,875,702

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