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Net intangible assets and goodwill (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | $ 110,049 | $ 103,046
Total accumulated amortization | (76,451) | (71,601)
Subtotal | 33,598 | 31,445
Goodwill | 5,210 | 5,601
Net intangible assets including goodwill | 38,808 | 37,046
Brazil |  |
Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | 2,992 | 3,196
Argentina |  |
Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | 1,276 | 1,276
Chile |  |
Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | 873 | 1,047
Colombia |  |
Finite-Lived Intangible Assets [Line Items] |  |
Goodwill | 69 | 82
Computer software cost |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | 79,054 | 69,999
Initial franchise fees |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | 13,652 | 14,223
Reacquired franchised rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | 15,403 | 16,884
Letter of credit fees |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | 940 | 940
Others |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total cost | $ 1,000 | $ 1,000

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