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Related Party Transactions (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount due from related parties |  | ¥ 59,268 |  | ¥ 44,278 |  | $ 9,110
Amount due to related parties |  | 81,810 |  | 71,167 |  | 12,574
Kingsoft Group |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount due from related parties |  | 16,227 |  | 15,262 |  | 2,494
Amount due to related parties |  | 16,146 |  | 26,247 |  | 2,482
Kingsoft Group | Corporate, technical support and leasing services received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [1] | 28,596 | $ 4,395 | 26,613 | ¥ 7,588 |
Kingsoft Group | Licensing fees paid to |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [2] | 8,435 | 1,296 | 12,162 | 9,129 |
Kingsoft Group | Promotion services received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [3] | 8,142 | 1,251 | 22,599 | 28,231 |
Tencent Group |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount due from related parties |  | 11,598 |  | 14,412 |  | 1,782
Amount due to related parties |  | 36,591 |  | 26,421 |  | 5,624
Tencent Group | Corporate, technical support and leasing services received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [1] | 17,399 | 2,674 |  |  |
Tencent Group | Promotion services received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [3] | 30,695 | 4,718 | 39,069 | 41,599 |
Tencent Group | Promotion services provided to |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [4] | 58,669 | 9,017 | 153,650 | 293,510 |
Xiaomi Group |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount due from related parties |  | 13,395 |  | 7,694 |  | 2,059
Amount due to related parties |  | 26,072 |  | 11,638 |  | 4,007
Xiaomi Group | Promotion services received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [3] | 61,042 | 9,382 | 59,377 | 47,826 |
Beijing OrionStar | Technical support services provided to |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [5] | 10,920 | 1,678 |  |  |
Beijing OrionStar | Capital injection provided to |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount |  | 264,768 | 40,694 |  |  |
Matrix Partners IV | Capital injection received from |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount |  | 151,419 | $ 23,273 |  |  |
Baomi Technology [Member] | Sales of products to |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount | [6] |  |  |  | ¥ 12,701 |
Other Related Parties |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Amount due from related parties | [7] | 18,048 |  | 6,910 |  | 2,775
Amount due to related parties | [7] | ¥ 3,001 |  | ¥ 6,861 |  | $ 461
[1] | In 2015, 2016 and 2017, the Group entered into agreements with Kingsoft Group and Tencent Group, pursuant to which these entities provided services including corporate, technology support and leasing services to the Group.
[2] | On January 1, 2009, Kingsoft Japan entered into an exclusive licensing agreement with Kingsoft Group, pursuant to which Kingsoft Group granted Kingsoft Japan the exclusive right to use certain office software within Japan and to sub-license such software to original equipment manufacturers in Japan solely for their self-use and sale of products and services.
[3] | In 2015, 2016 and 2017, the Group entered into agreements with Kingsoft Group, Tencent Group and Xiaomi Group for promotion services ranging from one to two years.
[4] | In 2015, 2016 and 2017, the Group entered into a series of agreements with Tencent Group to provide online advertising services.
[5] | In 2017, the Group entered into a series of agreements with Beijing OrionStar to provide technical support services.
[6] | In 2015, the Group entered into a series of agreements with Baomi Technology to sell purifiers.
[7] | The balances mainly represent services received from or provided to the Group's equity investees and entities controlled by a director of the Group in the ordinary course of business.

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