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Tax Effects of Temporary Differences that Give Rise to Deferred Tax Balances (Detail) In Thousands, unless otherwise specified | Dec. 31, 2012 USD ($) | Dec. 31, 2012 CNY | Dec. 31, 2011 CNY
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Schedule of Deferred Income Tax Assets and Liabilities [Line Items] |  |  |
Provision for doubtful receivables | $ 266 | 1,655 | 2,586
Fixed assets depreciation | 2,146 | 13,367 | 36,274
Net operating loss carry-forward | 53,514 | 333,397 | 248,790
Accrued expenses, payroll and others | 34,382 | 214,211 | 140,805
Deferred tax assets | 90,308 | 562,630 | 428,455
Valuation allowance | (56,020) | (349,012) | (254,919)
Deferred tax assets, net | 34,288 | 213,618 | 173,536
Long-lived assets arising from acquisitions | 46,465 | 289,482 | 131,629
Deferred tax liabilities | $ 46,465 | 289,482 | 131,629

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