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Prepaid Land Lease Payments - Additional Information (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 582us-gaap_AdjustmentForAmortization	3,610us-gaap_AdjustmentForAmortization	2,801us-gaap_AdjustmentForAmortization	1,637us-gaap_AdjustmentForAmortization

X

- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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- Details

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