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Material accounting policies - Derivative financial instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]    
Notional Value $ 93,607 $ 536,532
$150 million facility    
Disclosure of detailed information about borrowings [line items]    
Notional Value $ 150,000