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Related Party Transactions (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Related party transactions |  |  |
Costs and expenses allocated from SINA | $ 25,703,000 | $ 24,678,000 | $ 42,360,000
Interest expense on amount due to SINA | 0 | 0 | 2,838,000
Repayment of amount due to SINA |  | 2,863,000 | 269,042,000
Related party outstanding balance: |  |  |
Due to related parties |  | 12,188,000 |
SINA |  |  |
Related party transactions |  |  |
Revenue billed through SINA | 39,285,000 | 22,114,000 | 4,057,000
Deemed contribution from SINA |  |  | 61,176,000
Costs and expenses allocated from SINA | 25,703,000 | 24,678,000 | 42,360,000
Interest expense on amount due to SINA |  |  | 2,838,000
Repayment of amount due to SINA |  | 2,863,000 | 276,614,000
Other costs and expenses billed by SINA | 20,300,000 | 29,400,000 | 15,100,000
Related party outstanding balance: |  |  |
Accounts receivable due from related parties | 18,565,000 |  |
Due to related parties |  | 12,188,000 |
SINA | Transfer of Equity Interest in Weibo Funds |  |  |
Related party transactions |  |  |
Legal transfer of investee and recognition of due to SINA |  |  | 22,565,000
Alibaba |  |  |
Related party transactions |  |  |
Advertising and marketing revenues from related party | 57,908,000 | 143,650,000 | 107,587,000
Deemed contribution from Alibaba |  |  | 15,300,000
Services provided by Alibaba | 13,988,000 | 4,515,000 | 128,000
Related party outstanding balance: |  |  |
Accounts receivable due from related parties | 24,293,000 | 54,052,000 |
Alibaba | Strategic cooperation with Alibaba |  |  |
Related party transactions |  |  |
Advertising and marketing revenues from related party |  | 137,400,000 | 107,600,000
Other related parties |  |  |
Related party transactions |  |  |
Advertising and marketing revenues from related party | 45,600,000 | 29,200,000 | 27,600,000
Related party outstanding balance: |  |  |
Other revenues from related party | 600,000 | 2,100,000 | 1,500,000
Amount of promotional services from related parties | 10,600,000 | 7,800,000 | $ 11,200,000
Due from related parties | 30,100,000 | 33,900,000 |
Due to related parties | $ 9,300,000 | $ 8,000,000 |

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