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Cost of Services - Summary of Cost of Services (Detail) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cost Of Service [Abstract]      
Employee cost (Note 24) $ 663,360 $ 584,560 $ 502,794
Maintenance 505,352 346,805 302,203
Safety, security and insurance 317,023 282,310 249,752
Utilities 278,895 222,891 192,158
Other 345,777 345,805 311,351
Cost of services $ 2,110,407 $ 1,782,371 $ 1,558,258