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Employee Cost - Summary of Employee Cost (Detail) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure Of Employee Cost [Abstract]      
Wages and salaries $ 453,452 $ 403,312 $ 341,134
Other remunerations 61,527 50,709 47,612
Social benefits 54,003 44,967 42,354
Severance payments 4,464 6,479 5,102
Labor union fees 16,991 15,421 14,842
Taxes on employee benefits 7,832 6,483 6,053
PTU 10,128 10,337 2,917
Retirement employee benefits 16,688 14,598 13,352
Others 38,275 32,254 29,348
Total employee cost $ 663,360 $ 584,560 $ 502,794