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Income taxes - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Income Tax Disclosure [Line Items]          
Effective income tax rate 2.60% (0.50%) 3.10% (0.60%)  
Statutory federal tax rate     21.00%    
Conversion of stock (in shares) | shares 0   6,496,800    
Stockholder's equity, exchange ratio 1   1    
Deferred tax assets, valuation allowance $ 125,200,000   $ 125,200,000   $ 95,100,000
Liability on tax receivable agreement 0   0   $ 0
Unrecognized liability on tax receivable agreement 121,000,000   121,000,000    
Payments pursuant to tax receivable agreement     0 $ 2,822,000  
Tax Receivables Agreement | Related Party          
Income Tax Disclosure [Line Items]          
Payments pursuant to tax receivable agreement $ 0 $ 0 $ 0 $ 2,800,000