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Description of the business and summary of significant accounting policies - Foreign currency exchange differences and liabilities and provisions (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
MXN ($)
USD ($)
Dec. 31, 2021
₡ / $
USD ($)
Dec. 31, 2021
Q / $
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
MXN ($)
USD ($)
Dec. 31, 2020
₡ / $
USD ($)
Dec. 31, 2020
USD ($)
Q / $
Dec. 31, 2019
USD ($)
Dec. 31, 2019
MXN ($)
USD ($)
Dec. 31, 2019
₡ / $
USD ($)
Dec. 31, 2019
Q / $
USD ($)
Apr. 26, 2022
$ / $
Dec. 31, 2021
₡ / $
Dec. 31, 2021
Q / $
Dec. 31, 2021
$ / $
Dec. 31, 2020
₡ / $
Dec. 31, 2020
Q / $
Dec. 31, 2020
$ / $
Dec. 31, 2019
₡ / $
Dec. 31, 2019
Q / $
Dec. 31, 2019
$ / $
Description of the business and summary of significant accounting policies                                            
Average exchange rate for year 20.9853   641.2439 7.75370 21.4961   588.4240 7.7292 19.2618   590.9574 7.7066                    
Exchange rate as of end of the year 20.5835 20.5835 20.5835 20.5835 19.9487 19.9487 19.9487 19.9487 18.8452 18.8452 18.8452 18.8452 20.3183 645.9000 7.7285 20.5835 615.7800 7.8095 19.9487 573.4400 7.6988 18.8452
Exchange differences on translation of foreign operations $ (195,000) $ (4,021)       $ 23,970       $ 8,045