v3.25.2
Stock-based compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Stock Based Compensation [Line Items]                
Stock-based compensation   $ 435,000,000 $ 16,700,000 $ 447,682,000 $ 26,229,000 $ 50,134,000 $ 107,999,000 $ 69,266,000
Capitalized stock-based compensation expense related to internally developed software   65,600,000 3,500,000 68,348,000 6,944,000 13,646,000 13,118,000 $ 6,262,000
Unrecognized stock-based compensation cost $ 13,900,000 13,900,000   13,900,000   $ 23,700,000    
Weighted average period 1 year 6 months         1 year 4 months 24 days    
Share based transaction modification of terms incremental compensation cost             31,600  
Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, exercisable, aggregate intrinsic value           $ 29,100,000 $ 24,800,000  
Share-based compensation arrangement by share-based payment award, options, grants in period, grant date intrinsic value             $ 14.19  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross           0 1,730,000  
Restricted Stock Units (RSUs) [Member]                
Stock Based Compensation [Line Items]                
Unrecognized stock-based compensation cost $ 309,900,000 309,900,000   309,900,000   $ 528,000,000    
Weighted average period 3 years 2 months 12 days         10 months 24 days    
Business Combination Shares [Member]                
Stock Based Compensation [Line Items]                
Stock-based compensation   8,200,000 $ 9,800,000 15,300,000 $ 20,200,000 $ 31,000,000    
Unrecognized stock-based compensation cost $ 48,100,000 $ 48,100,000   $ 48,100,000   $ 17,800,000    
Weighted average period 2 years 3 months 18 days         1 year 7 months 6 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross       1,473,000        
Common Class A [Member]                
Stock Based Compensation [Line Items]                
Stock based compensation expense       $ 423,800,000        
Capitalized costs related to internally developed software       $ 62,700,000