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Leases Obligations - Additional Information (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Leases Obligations [Line Items]        
Amortization Rights of Use Assets   $ 12,977 $ 16,261 $ 13,118
Lease agreements, average discount interest rate 8.23% 7.95% 7.99% 8.38%
Interest on liability for lease   $ 2,582 $ 3,703 $ 3,733
Bottom of Range [Member]        
Disclosure Of Leases Obligations [Line Items]        
Average lease term   2 years    
Top of Range [Member]        
Disclosure Of Leases Obligations [Line Items]        
Average lease term   4 years