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Income taxes - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Operating Loss Carryforwards [Line Items]          
Other Tax Expense (Benefit) $ 100 $ 200 $ 200 $ 500  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   262,700   262,700  
Income tax (benefit) expense 5,960 (270,228) 6,019 (280,679)  
Loss before income taxes 23,530 41,533 31,793 37,866  
Current Foreign Tax Expense (Benefit) 5,800 2,000 7,700 400  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   262,700   262,700  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions     (400)    
Unrecognized Tax Benefits 22,400   22,400   $ 21,300
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 9,400   9,400    
Income Tax Effects Allocated Directly to Equity, Other $ 100 4,700 1,700 4,700  
Restructuring adjustments   $ 100 $ 100 $ 600