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Income tax incurred and deferred: Temporary differences (Details) - MXN ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Income tax: |  |  |
Deferred tax assets | $ 264,283 | $ 260,202 |
Deferred tax liabilities | (3,308,915) | (3,425,347) |
Deferred income tax liability - Net | (3,044,632) | (3,165,145) | $ (3,004,584)
Temporary differences |  |  |
Income tax: |  |  |
Deferred tax assets | 57,201 | 31,019 |
Fair Value of Long term Debt |  |  |
Income tax: |  |  |
Deferred tax assets | 149,120 | 162,574 |
Allowance for doubtful accounts [member] |  |  |
Income tax: |  |  |
Deferred tax assets | 57,962 | 66,609 |
Deferred income tax liability - Net | 57,962 | 66,609 | $ 34,296
Fixed and intangible assets |  |  |
Income tax: |  |  |
Deferred tax liabilities | (3,111,403) | (3,198,632) |
Temporary assets |  |  |
Income tax: |  |  |
Deferred tax liabilities | (197,104) | (226,106) |
Amortization of expenses |  |  |
Income tax: |  |  |
Deferred tax liabilities | (408) | (609) |
Colombia (Airplan) | Fixed and intangible assets |  |  |
Income tax: |  |  |
Deferred tax liabilities | (587,845) | (647,571) |
Puerto Rico (Aerostar) | Fixed and intangible assets |  |  |
Income tax: |  |  |
Deferred tax liabilities | $ (1,100,265) | $ (1,032,799) |

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_o&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_56&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_o&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_56&doctype=Standard -URIDate 2021-03-24 + Details
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