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Disposal of WiFire Entities and Aipu Group - Additional Information (Detail) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 CNY (¥) Subsidiary shares | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of wholly owned subsidiaries | Subsidiary | 6 |  |
Impairment losses of long-lived assets |  | $ 61,757 | ¥ 401,808
Impairment losses of goodwill | ¥ 766,000 | 117,800 | 766,440
Gain on disposal of subsidiaries |  | $ 76,393 | ¥ 497,036
WiFire Group Inc. ("WiFire Group") |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Equity interest transferred | 66.67% |  |
Consideration price | ¥ 6 |  |
Equity interest | 33.33% |  |
Aipu Group |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Consideration price | ¥ 1 |  |
Number of shares transferred | shares | 2 |  |
Ownership percentage before transaction | 50.00% |  |
Description of ownership after transfer of shares | The Company’s ownership in SC Aipu changed from 50% equity interest plus one share to 50% equity interest minus one share and lost control. |  |
Tibet Xingtao Culture Communications Co., Ltd. [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Equity interest transferred |  | 50.00% | 50.00%
Consideration price |  |  | ¥ 1

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