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Related Party Transactions (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related Party Transactions |  |  |
Interest income | $ 118,209,000 | $ 105,434,000 | $ 77,280,000
Related party outstanding balance: |  |  |
Payable to SINA for the acquisition of the equity of STC (Note 6) | 0 | 218,402,000 |
Accounts receivable | 440,768,000 | 502,443,000 |
Prepaid expenses and other current assets | 359,881,000 | 391,502,000 |
Other non-current assets | 755,762,000 | 898,422,000 |
Accounts receivable | 440,768,000 | 502,443,000 |
Accounts payable | 161,493,000 | 161,029,000 |
Accrued and other liabilities | $ 656,445,000 | 913,984,000 |
Related Parties [Member] | Loans to and interest receivable |  |  |
Related Party Transactions |  |  |
Loan agreement term | 5 years |  |
Related party outstanding balance: |  |  |
Other non-current assets | $ 349,716,000 | 454,912,000 |
Total of expenses | 449,716,000 | 564,912,000 |
Other related parties |  |  |
Related Party Transactions |  |  |
Costs and expenses | 33,900,000 | 32,300,000 | 62,600,000
Related party outstanding balance: |  |  |
Accounts receivable | 38,200,000 | 48,600,000 |
Accounts receivable | 38,200,000 | 48,600,000 |
Accounts payable | 36,800,000 | 21,700,000 |
Accrued and other liabilities | 6,000,000.0 | 6,600,000 |
Other related parties | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Prepaid expenses and other current assets | 100,000,000 | 110,000,000 |
Credit losses recognized (reversal) | $ 2,100,000 | $ 7,600,000 | $ 0
SINA | Related Parties [Member] |  |  |
Related Party Transactions |  |  |
Loan agreement term | 1 year | 1 year | 1 year
Loan to SINA | $ 1,105,700,000 | $ 1,261,900,000 | $ 978,200,000
Loan repaid by SINA | 1,071,100,000 | 1,249,476,000 | 1,058,574,000
Revenue | 66,810,000 | 76,946,000 | 111,521,000
Costs and expenses | 36,483,000 | 47,178,000 | 38,270,000
Interest Income, Operating | 14,913,000 | 14,770,000 | 17,943,000
Related party outstanding balance: |  |  |
Amount due from SINA | 486,397,000 | 487,117,000 |
Payable to SINA for the acquisition of the equity of STC (Note 6) | 0 | 218,402,000 |
SINA | Related Parties [Member] | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Amount due from SINA | 445,200,000 | 420,400,000 |
SINA | Related Parties [Member] | Revenue billed through |  |  |
Related Party Transactions |  |  |
Revenue | 41,557,000 | 44,962,000 | 68,351,000
SINA | Related Parties [Member] | Revenue from services provided to |  |  |
Related Party Transactions |  |  |
Revenue | 25,253,000 | 31,984,000 | 43,170,000
SINA | Related Parties [Member] | Costs and expenses incurred by Weibo but paid by SINA |  |  |
Related Party Transactions |  |  |
Costs and expenses | 24,900,000 | 37,700,000 | 48,000,000.0
SINA | Related Parties [Member] | Costs and expenses related to certain of SINA's activities for which Weibo made the payments |  |  |
Related Party Transactions |  |  |
Costs and expenses | 9,900,000 | 600,000 | 800,000
Alibaba | Related Parties [Member] |  |  |
Related Party Transactions |  |  |
Services provided by Alibaba | 23,366,000 | 33,745,000 | 44,006,000
Related party outstanding balance: |  |  |
Accounts receivable | 61,094,000 | 75,347,000 |
Accounts receivable | 61,094,000 | 75,347,000 |
Alibaba | Related Parties [Member] | Advertising and marketing revenues as an advertiser |  |  |
Related Party Transactions |  |  |
Revenue | 111,608,000 | 106,974,000 | 139,561,000
Alibaba | Related Parties [Member] | Advertising and marketing revenues as an agent |  |  |
Related Party Transactions |  |  |
Revenue |  | 223,000 | 41,680,000
Company A | Other related parties | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Prepaid expenses and other current assets | 100,000,000 | 110,000,000 |
Company B | Other related parties | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Other non-current assets | $ 349,716,000 | $ 454,912,000 |
Minimum | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Annual interest rate | 4.00% | 4.00% |
Minimum | SINA | Related Parties [Member] | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Annual interest rate | 1.00% |  |
Maximum | Related Parties [Member] | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Annual interest rate | 6.70% | 6.70% |
Maximum | SINA | Related Parties [Member] | Loans to and interest receivable |  |  |
Related party outstanding balance: |  |  |
Annual interest rate | 4.00% |  |
Advertising and marketing revenues | Other related parties |  |  |
Related Party Transactions |  |  |
Revenue | $ 32,700,000 | $ 40,500,000 | 70,000,000.0
Advertising and marketing revenues | SINA | Related Parties [Member] |  |  |
Related Party Transactions |  |  |
Revenue | 45,319,000 | 56,206,000 | 96,359,000
Value-added services revenues | Other related parties |  |  |
Related Party Transactions |  |  |
Revenue | 2,700,000 | 8,100,000 | 3,300,000
Value-added services revenues | SINA | Related Parties [Member] |  |  |
Related Party Transactions |  |  |
Revenue | $ 21,491,000 | $ 20,740,000 | $ 15,162,000

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