v3.26.1
Share-based compensation - Restricted shares and RSUs (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Share based compensation        
Weighted-average remaining vesting period for outstanding share options 6 years 3 months 18 days 5 years 9 months 5 years 10 months 24 days 6 years 4 months 20 days
Restricted shares and RSUs        
Share based compensation        
Number of Shares, Unvested at beginning (in shares) | shares 3,779,613 8,460,274 14,597,666  
Number of Shares, Granted (in shares) | shares 1,446,216 647,941 899,005  
Number of Shares, Vested (in shares) | shares (2,655,580) (4,918,922) (6,079,090)  
Number of Shares, Forfeited/cancelled (in shares) | shares (256,346) (409,680) (957,307)  
Number of Shares, Unvested at ending (in shares) | shares 2,313,903 3,779,613 8,460,274 14,597,666
Number of Shares, Expected to vest at ending (in shares) | shares 1,904,094      
Weighted Average Grant Date Fair Value, Unvested at beginning (in dollars per share) | $ $ 35.78 $ 41.42 $ 40.97  
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ 19.9 16.38 13.51  
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ 40.08 41.65 39.3  
Weighted Average Grant Date Fair Value, Forfeited/cancelled (in dollars per share) | $ 17.24 26.99 33.7  
Weighted Average Grant Date Fair Value, Unvested at ending (in dollars per share) | $ 22.97 $ 35.78 $ 41.42 $ 40.97
Weighted Average Grant Date Fair Value, Expected to vest at ending (in dollars per share) | $ $ 23.15      
Weighted Average Remaining Contractual Life, Unvested (In Years) 8 years 3 months 3 days 6 years 9 months 18 days 7 years 1 month 20 days 7 years 5 months 19 days
Weighted Average Remaining Contractual Life, Expected to vest (In Years) 8 years 1 month 28 days