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Machinery, Equipment and Improvements on Leased Assets - Summary of Net Balances of Machinery, Equipment and Improvements on Leased Assets (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment $ 2,146,232 $ 1,905,684 $ 1,906,233 $ 1,655,688
Machinery and equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 1,602,765 1,393,985 1,426,828  
Office furniture and equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 188,767 196,928 165,061  
Computer equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 264,637 225,984 228,427  
Transportation equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 45,992 25,058 18,236  
Communication equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment 10,047 11,637 12,810  
Improvements on leased assets [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Property plant and equipment $ 34,024 $ 52,092 $ 54,871