v3.26.1
Income taxes - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Income Tax Disclosure [Abstract]          
Income tax expense / (benefit) $ 19,615 $ (20,674) $ 42,422 $ (323)  
Effective income tax rate 21.30% (11.30%) 19.30% (0.10%)  
Increase (release) of provisions for uncertain tax position $ 1,900 $ (29,300) $ 2,700 $ (27,300)  
Increase (release) of deferred tax liability related to investments in foreign subsidiaries 0 $ (30,600) 0 $ (30,800)  
Unrecognized tax benefits and related interest and penalties 105,900   105,900   $ 103,300
Unrecognized tax benefits 80,800   80,800   81,000
Interest and related penalties $ 25,100   $ 25,100   $ 22,300