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Corporate information (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2023
USD ($)
subsidiary
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of detailed information about borrowings [line items]        
Number of subsidiaries | subsidiary 3      
Cash and cash equivalents $ 310,407 $ 326,441 $ 380,860 $ 466,544
Senior Secured Term Loans        
Disclosure of detailed information about borrowings [line items]        
Cash and cash equivalents, minimum quarterly balance $ 60,000