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Cost of Services - Summary of Cost of Services (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cost Of Service [Abstract]      
Employee cost (Note 23) $ 970,481 $ 877,068 $ 773,630
Maintenance 426,523 578,510 528,929
Safety, security and insurance 458,316 428,208 386,079
Utilities 355,562 380,370 334,994
Allowance expected credit loss 86,596 5,299 (15,131)
Other 371,229 475,409 445,221
Cost of services $ 2,668,707 $ 2,744,864 $ 2,453,722