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Machinery, Equipment and Improvements on Leased Buildings - Summary of Additions for Investment and Depreciation of Machinery, Equipment and Improvements on Leased Buildings (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [Line Items]      
Net amounts $ 0 $ 0 $ 381,427
Machinery and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Net amounts     342,961
Office furniture and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Net amounts     6,498
Computer equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Net amounts     31,626
Transportation equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Net amounts     $ 342