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Net intangible assets and goodwill
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Net intangible assets and goodwill Net intangible assets and goodwill
Net intangible assets and goodwill consist of the following at year-end:

 20212020
Net intangible assets (i)  
Computer software cost$79,054 $69,999 
Initial franchise fees13,652 14,223 
Reacquired franchised rights15,403 16,884 
Letter of credit fees940 940 
Others1,000 1,000 
Total cost110,049 103,046 
Total accumulated amortization(76,451)(71,601)
Subtotal33,598 31,445 
Goodwill (ii)20212020
Brazil2,992 3,196 
Argentina1,276 1,276 
Chile873 1,047 
Colombia69 82 
Subtotal5,210 5,601 
 $38,808 $37,046 

(i)Total amortization expense for fiscal years 2021, 2020 and 2019 amounted to $10,932, $11,822 and $11,580, respectively. The estimated aggregate amortization expense for each of the five succeeding fiscal years and thereafter is as follows: $13,470 for 2022, $10,263 for 2023; $4,465 for 2024; $1,777 for 2025; $1,656 for 2026; and thereafter $1,967.
(ii)Related to the acquisition of franchised restaurants (Brazil, Argentina, Chile and Colombia) and non-controlling interests in Chile.