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Fair Value Measurement - Fair Value Hierarchy (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value Measurement |  |
Wealth management products, short-term | $ 76,917 | $ 69,947
Equity securities with readily determinable market value | 158,090 | 136,832
Financial instruments measured on a recurring basis |  |
Fair Value Measurement |  |
Wealth management products, short-term | 76,917 | 69,947
Wealth management products, long-term | 201,244 | 194,746
Equity securities with readily determinable market value | 158,090 | 136,832
Total | 436,251 | 401,525
Financial instruments measured on a recurring basis | Quoted Prices in Active Market for Identical Assets (Level 1) |  |
Fair Value Measurement |  |
Wealth management products, short-term | 0 | 0
Wealth management products, long-term | 0 | 0
Equity securities with readily determinable market value | 158,090 | 136,832
Total | 158,090 | 136,832
Financial instruments measured on a recurring basis | Significant Other Observable Inputs (Level 2) |  |
Fair Value Measurement |  |
Wealth management products, short-term | 76,917 | 69,947
Wealth management products, long-term | 201,244 | 194,746
Equity securities with readily determinable market value | 0 | 0
Total | 278,161 | 264,693
Financial instruments measured on a recurring basis | Significant Unobservable Inputs (Level 3) |  |
Fair Value Measurement |  |
Wealth management products, short-term | 0 | 0
Wealth management products, long-term | 0 | 0
Equity securities with readily determinable market value | 0 | 0
Total | $ 0 | $ 0

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