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Financial instruments - Schedule of foreign exchange gains and losses recognized within AOCI and the interest benefit recognized within interest expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]      
Foreign exchange gains $ (62,904) $ (63,191) $ 59,758
Interest benefit on swaps not designed as hedging instrument 20,880 19,296 $ 19,178
Cross Currency Interest Rate Contract | Not Designated as Hedging Instrument      
Derivative Instruments, Gain (Loss) [Line Items]      
Interest benefit on swaps not designed as hedging instrument 20,880 19,296  
Cross Currency Interest Rate Contract | Cash Flow Hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Foreign exchange gains $ 22,399 $ 34,849