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Summary of Intangible Assets (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥)
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | ¥ 977,341 | ¥ 1,274,166 |
Additions |  | 20,311 | 39,544 |
Disposals |  | (280,397) | (6,531) |
Foreign currency translation difference |  | (8,686) | 8,929 |
Amortization expense | $ (22,071) | (143,602) | (183,964) | ¥ (184,147)
Impairment | (25,314) | (163,852) | (154,803) |
Ending Balance | 61,650 | 401,115 | 977,341 | 1,274,166
Purchased software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 73,445 | 74,471 |
Additions |  | 11,073 | 26,763 |
Disposals |  | (5,973) | (6,531) |
Foreign currency translation difference |  | (905) | 1,814 |
Amortization expense |  | (27,011) | (23,072) |
Ending Balance | 7,781 | 50,629 | 73,445 | 74,471
Radio Spectrum License |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 91,568 | 93,387 |
Foreign currency translation difference |  | (7,781) | 7,115 |
Amortization expense |  | (6,646) | (8,934) |
Ending Balance | 11,856 | 77,141 | 91,568 | 93,387
Network Use Right |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 15,834 | 16,834 |
Disposals |  | (15,086) |  |
Amortization expense |  | (748) | (1,000) |
Ending Balance |  |  | 15,834 | 16,834
Contract Backlog |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 18,338 | 24,926 |
Amortization expense |  | (6,588) | (6,588) |
Ending Balance | 1,806 | 11,750 | 18,338 | 24,926
Customer Relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 412,775 | 595,648 |
Disposals |  | (134,706) |  |
Amortization expense |  | (52,992) | (80,349) |
Impairment |  | (87,195) | (102,524) |
Ending Balance | 21,192 | 137,882 | 412,775 | 595,648
Licenses |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 12,557 | 16,519 |
Disposals |  | (4,000) |  |
Amortization expense |  | (757) | (1,266) |
Impairment |  | (3,532) | (2,696) |
Ending Balance | 656 | 4,268 | 12,557 | 16,519
Supplier Relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 88,443 | 115,727 |
Disposals |  | (7,227) |  |
Amortization expense |  | (19,304) | (25,277) |
Impairment |  | (41,768) | (2,007) |
Ending Balance | 3,096 | 20,144 | 88,443 | 115,727
Trade Names |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 168,385 | 211,189 |
Disposals |  | (37,270) |  |
Amortization expense |  | (12,217) | (17,908) |
Impairment |  | (22,494) | (24,896) |
Ending Balance | 14,817 | 96,404 | 168,385 | 211,189
Platform Software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 3,924 | 7,753 |
Amortization expense |  | (3,241) | (3,829) |
Ending Balance | 105 | 683 | 3,924 | 7,753
Non - Complete Agreement |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 8,903 | 18,504 |
Disposals |  | (4,297) |  |
Amortization expense |  | (3,347) | (5,694) |
Impairment |  | (1,105) | (3,907) |
Ending Balance | 24 | 154 | 8,903 | 18,504
Internal Use Software |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 40,006 | 27,619 |
Additions |  | 9,238 | 12,781 |
Disposals |  | (41,660) |  |
Amortization expense |  | (5,524) | (394) |
Ending Balance | $ 317 | 2,060 | 40,006 | 27,619
Property management relationship |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Beginning Balance |  | 43,163 | 71,589 |
Disposals |  | (30,178) |  |
Amortization expense |  | (5,227) | (9,653) |
Impairment |  | ¥ (7,758) | (18,773) |
Ending Balance |  |  | ¥ 43,163 | ¥ 71,589

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