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Retirement plans - Additional information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of net defined benefit liability (asset) [line items]    
Retirement obligation (asset) $ 15,600,000 $ 31,852,000
Weighted average duration of defined benefit obligation 8 years  
Unfunded | Chile    
Disclosure of net defined benefit liability (asset) [line items]    
Retirement obligation (asset) $ 19,500,000 35,300,000
Estimate of contributions expected to be paid to plan for next annual reporting period 7,600,000  
Funded    
Disclosure of net defined benefit liability (asset) [line items]    
Retirement obligation (asset) (5,000,000) (4,800,000)
Estimate of contributions expected to be paid to plan for next annual reporting period 0  
Funded | Europe    
Disclosure of net defined benefit liability (asset) [line items]    
Retirement obligation (asset) 1,100,000 $ 1,400,000
Estimate of contributions expected to be paid to plan for next annual reporting period $ 400,000