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Income Taxes - Summary of Deferred Income Tax from Tax Loss Carryforwards (Detail) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Tax Loss Carryforwards [Abstract] |  |  |
Tax loss carryforwards | $ 1,340,729 | $ 1,070,673 | $ 1,162,441
Unrecognized tax loss carryforwards | (1,021,106) | (899,659) | (784,917)
Recognized tax loss carryforwards | $ 319,623 | $ 171,014 | $ 377,524

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