XML 78 R65.htm IDEA: XBRL DOCUMENT v3.21.1
Intangible and other long-term assets (Narrative) (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2009
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets $ 11,250 $ 9,880  
Trademark San 42 [Member]      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets impairment loss     $ 16,000
Goodwill [Member]      
Disclosure of detailed information about intangible assets [line items]      
Goodwill impairment loss     $ 2,352,000