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Post-employment benefits - Summary of Movement in Defined Benefit Obligation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reconciliation Of Changes In Defined Benefit Obligation [Abstract]      
January 1 $ (19,252) $ (17,889)  
Changes In Defined Benefit Obligation [Abstract]      
Service Cost (1,321) (1,849) $ (1,134)
of which current service cost (1,758) (1,963)  
of which past service cost including effects from curtailment 437 114  
Interest expense (414) (156) (50)
Actuarial gains (losses) 403 2,360 497
Actual plan participants’ contributions (1,441) (1,361)  
Transfers (in) out due to (joiners) leavers 1,037 (551)  
Currency translation differences (2,025) 194  
December 31 (23,013) (19,252) (17,889)
Funded      
Reconciliation Of Changes In Defined Benefit Obligation [Abstract]      
January 1 (19,221) (17,686)  
Changes In Defined Benefit Obligation [Abstract]      
Service Cost (1,311) (1,759) (1,054)
of which current service cost (1,748) (1,873)  
of which past service cost including effects from curtailment 437 114  
Interest expense (413) (154) (49)
Actuarial gains (losses) 401 2,110 471
Actual plan participants’ contributions (1,441) (1,361)  
Transfers (in) out due to (joiners) leavers 1,037 (551)  
Currency translation differences (2,024) 180  
December 31 (22,972) (19,221) (17,686)
Unfunded      
Reconciliation Of Changes In Defined Benefit Obligation [Abstract]      
January 1 (31) (203)  
Changes In Defined Benefit Obligation [Abstract]      
Service Cost (10) (90) (80)
of which current service cost (10) (90)  
of which past service cost including effects from curtailment 0 0  
Interest expense (1) (2) (1)
Actuarial gains (losses) 2 250 26
Actual plan participants’ contributions 0 0  
Transfers (in) out due to (joiners) leavers 0 0  
Currency translation differences (1) 14  
December 31 $ (41) $ (31) $ (203)