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Lease liabilities - Maturity of Lease Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid $ 246,854 $ 195,772
Less than 1 year    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid 45,136 36,337
Between 1 and 2 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid 44,847 20,276
Between 2 and 3 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid 38,745 30,228
Between 3 and 4 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid 30,085 23,920
Between 4 and 5 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid 24,072 19,951
More than 5 years    
Disclosure of maturity analysis of operating lease payments [line items]    
Undiscounted operating lease payments to be paid $ 63,969 $ 65,060