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Income taxes - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Operating Loss Carryforwards [Line Items]              
Other Tax Expense (Benefit)   $ 300,000   $ 100,000 $ 400,000 $ 200,000  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   200,000 $ 294,900,000   295,100,000    
Income tax (benefit) expense   1,333,000   (3,998,000) 299,542,000 (12,251,000)  
Loss before income taxes   (46,488,000)   (21,210,000) (87,367,000) (59,332,000)  
Income tax (benefit) expense   1,333,000   (3,998,000) 299,542,000 (12,251,000)  
Loss before income taxes   (46,488,000)   (21,210,000) (87,367,000) (59,332,000)  
Current Foreign Tax Expense (Benefit)   1,500,000   4,600,000 2,900,000 13,400,000  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   200,000 $ 294,900,000   295,100,000    
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions $ (3,900,000)            
Unrecognized Tax Benefits 28,100,000 28,100,000     28,100,000   $ 25,800,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 13,000,000.0 13,000,000.0     13,000,000.0    
Income Tax Effects Allocated Directly to Equity, Other   500,000   300,000 3,000,000.0 600,000  
Restructuring adjustments   $ 600,000   $ 100,000 $ 1,100,000 $ 200,000