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Income taxes - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 22, 2017
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2018
Operating loss carryforwards          
Taxable income before consideration of NOL   $ 810,300,000      
Federal income tax provision   26,798,000 $ 0 $ 0  
State income tax provision   19,419,000 (27,226,000) $ 4,224,000  
Deferred tax valuation allowance   857,584,000 833,810,000    
Valuation allowance, deferred tax asset, increase (decrease)   $ 23,800,000 161,600,000    
Deferred tax liability on indefinite-lived intangibles acquired     $ 55,905,000    
Federal income tax provision at statutory rate 21.00% 21.00% 21.00% 21.00%  
Increase in current taxable income resulting from the elimination of current deduction of qualifying R&D costs under Section 174.   $ 62,500,000      
Undistributed earnings from non-US subsidiaries   425,300,000      
Undistributed earnings from non-US subsidiaries, tax   0      
Unrecognized tax benefits   107,988,000 $ 1,360,000    
Agilis          
Operating loss carryforwards          
Deferred tax liability on indefinite-lived intangibles acquired         $ 122,000,000
Federal          
Operating loss carryforwards          
Research and development credit carryforwards   146,500,000      
State          
Operating loss carryforwards          
Net operating loss carryforwards   204,900,000      
Foreign Tax Authority          
Operating loss carryforwards          
Net operating loss carryforwards   $ 9,800,000