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Related-party transactions - Summary (Details) - Management and selected employees - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of transactions between related parties [line items]      
Compensation selected employees $ (11,497) $ (7,883) $ (5,232)
Amounts payable, related party transactions $ (18,917) $ (16,198)