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Restricted Net Assets - Additional Information (Detail) In Thousands, unless otherwise specified	Sep. 30, 2012 USD ($)	Sep. 30, 2012 CNY	Dec. 31, 2011 CNY
Restricted Cash and Cash Equivalents Items [Line Items]
Net assets restricted with respect to transferring to the company	$ 282,081	1,772,820	1,218,289

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph e

-Subparagraph 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e)(3)(ii))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

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- Details

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