Restricted net assets (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restricted net assets | ||
| Percentage of after-tax income required to be transferred to statutory general reserve fund (as a percent) | 10.00% | |
| Reserve level threshold for mandatory appropriation requirement (as a percent) | 50.00% | |
| VIE's | ||
| Restricted net assets | ||
| Restricted net assets | $ 771,016 | $ 744,087 |
| Subsidiaries | ||
| Restricted net assets | ||
| Restricted net assets | $ 189,158 | $ 182,861 |