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Intangible assets and goodwill - Schedule of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Goodwill [Roll Forward]    
Goodwill beginning of the period $ 1,208,390 $ 1,031,696
Business acquisitions (note 3) 5,535 167,209
Foreign exchange (12,681) 9,485
Goodwill end of the period $ 1,201,244 $ 1,208,390