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Financial instruments - Fair values and risk management - Currency risk related to operating (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]      
Operating expense $ (661,195) $ (671,696) $ (726,666)
EUR | Fx rate risk      
Disclosure of detailed information about financial instruments [line items]      
Trade payables (5,888) (6,653) (5,680)
Operating expense (122,878) (103,339) (101,039)
USD | Fx rate risk      
Disclosure of detailed information about financial instruments [line items]      
Trade payables (36,144) (18,043) (20,332)
Operating expense (538,317) (568,357) (625,627)
Treasury Notes | EUR | Fx rate risk      
Disclosure of detailed information about financial instruments [line items]      
Treasury Notes (87,106) (50,664) (104,006)
Treasury Notes | USD | Fx rate risk      
Disclosure of detailed information about financial instruments [line items]      
Treasury Notes $ (700) $ 0 $ 0