v3.26.1
Share-based payments (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Aug. 31, 2014
Jul. 31, 2014
Share-based Payments          
Maximum period of authorized leave of absence after which vesting shall be suspended   90 days      
Options outstanding          
Outstanding at the beginning of the period (in shares) 5,792,691        
Exercised (in shares) (372,000)        
Outstanding at the end of the period (in shares) 5,420,691 5,792,691      
Non-vested at the end of the period (in shares) 74,495        
Options vested and expected to vest at the end of the period (in shares) 5,420,691        
Exercisable at the end of the period (in shares) 5,346,196        
Weighted average exercise price per share          
Outstanding, weighted average exercise price per share (in dollars per share) $ 65.85 $ 61.66      
Option vested and expected to vest at the end of the period (in dollars per share) 65.85        
Exercisable at the end of the period (in dollars per share) $ 65.84        
Weighted average remaining contractual years to expiry per share          
Outstanding, Weighted average remaining contractual years to expiry per share 3 years 11 months 8 days 4 years 8 months 19 days      
Options vested and expected to vest at the end of the period 3 years 11 months 8 days        
Exercisable at the end of the period 3 years 11 months 8 days        
Aggregate intrinsic value          
Outstanding, aggregate intrinsic value $ 122,494 $ 32,986      
Options vested and expected to vest at the end of the period 122,494        
Exercisable at the end of the period $ 120,885        
Minimum          
Share-based Payments          
Expiration period from grant date 5 years        
Post-termination exercise period 3 months        
Maximum          
Share-based Payments          
Expiration period from grant date 10 years        
Post-termination exercise period 9 months        
Key management          
Share-based Payments          
Estimated forfeiture rate (as a percent) 0.00% 0.00% 0.00%    
Employees          
Share-based Payments          
Estimated forfeiture rate (as a percent) 28.00% 29.00% 23.00%    
Class A ordinary shares          
Options outstanding          
Exercised (in shares)   (14,000) 0    
2014 Plan          
Share-based Payments          
Automatic increase of authorized ordinary shares         1.50%
2014 Plan | Class A ordinary shares          
Share-based Payments          
Number of ordinary shares authorized as stock based compensation         5,366,998
Amended and Restated 2014 Incentive Plan          
Share-based Payments          
Automatic increase of authorized ordinary shares       1.50%  
Amended and Restated 2014 Incentive Plan | Class A ordinary shares          
Share-based Payments          
Number of ordinary shares authorized as stock based compensation       13,985,001