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Significant Accounting Policies - Concentration of Risks (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 USD ($) customer Agency | Dec. 31, 2024 USD ($) | Dec. 31, 2023
Significant Accounting Policies |  |  |
Cash, cash equivalents and short-term investments | $ 2,405,080 | $ 2,350,484 |
Percentage Of Cash And Cash Equivalents Held Financial Institution | 36.00% |  |
Percentage Of Short Term Investments Held Financial Institution | 20.00% |  |
Accounts receivable | $ 400,209 | 339,754 |
Current liabilities denominated in RMB | 1,055,833 | 968,136 |
Cash Cash Equivalents And Short Term Investments | Concentration of credit risk | China |  |  |
Significant Accounting Policies |  |  |
Cash, cash equivalents and short-term investments | 2,200,000 | 1,600,000 |
Cash Cash Equivalents And Short Term Investments | Concentration of foreign currency risks | RMB |  |  |
Significant Accounting Policies |  |  |
Cash, cash equivalents and short-term investments | $ 2,039,600 | $ 1,487,600 |
Percentage of benchmark derived from specified source | 85.00% | 63.00% |
Consolidated net revenues benchmark | Customer concentration risk |  |  |
Significant Accounting Policies |  |  |
Other customers or advertising agencies accounting for 10% or more of the Group's revenues | customer | 0 |  |
Consolidated net accounts receivables benchmark | Concentration of credit risk | Alibaba |  |  |
Significant Accounting Policies |  |  |
Percentage of benchmark derived from specified source | 11.00% | 13.00% |
Consolidated net accounts receivables benchmark | Concentration of credit risk | Another customer |  |  |
Significant Accounting Policies |  |  |
Percentage of benchmark derived from specified source | 10.00% | 11.00% |
Consolidated net accounts receivables benchmark | Concentration of foreign currency risks | RMB |  |  |
Significant Accounting Policies |  |  |
Accounts receivable | $ 396,700 | $ 336,800 |
Current liabilities | Concentration of foreign currency risks | RMB |  |  |
Significant Accounting Policies |  |  |
Current liabilities denominated in RMB | $ 1,028,900 | $ 947,700 |
Advertising and marketing revenues | Consolidated net revenues benchmark | Customer concentration risk | Top 10 advertising agencies | China |  |  |
Significant Accounting Policies |  |  |
Percentage of benchmark derived from specified source | 32.00% | 35.00% | 37.00%
Number of advertising agencies | Agency | 10 |  |

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