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Machinery, Equipment and Improvements on Leased Buildings - Summary of Net Balances of Machinery, Equipment and Improvements on Leased Buildings (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment $ 1,655,688 $ 1,630,393 $ 1,555,593 $ 812,653
Machinery and equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 1,197,349 1,254,469 1,225,595  
Office furniture and equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 123,805 100,623 74,558  
Computer equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 251,071 219,619 214,725  
Transportation equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 12,510 11,663 13,675  
Communication equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 13,656 13,943 15,416  
Improvements on leased buildings [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment $ 57,297 $ 30,076 $ 11,624