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Shareholders' equity (Details) - USD ($)
shares in Thousands, $ in Thousands
9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Oct. 24, 2018
Stockholders' Equity Note [Abstract]      
Share repurchase program, authorized amount     $ 500,000
Common shares repurchased (in shares) 0 0  
Amount remaining under share repurchase authorization $ 287,452