Income Per Share - Schedule of Basic and Diluted Income Per Share (Detail) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY
Numerator:
Net income from continuing operations	$ 153,302	94,942	81,753	128,978
Net income from discontinued operations	4,798	29,767	4,140	1,853
Net income attributable to ordinary shareholders used in calculating income per ordinary share-basic and diluted	$ 20,100	124,709	85,893	130,831
Denominator:
Weighted average number of ordinary shares outstanding used in calculating basic income per share	134,836,300	134,836,300	135,077,172	138,211,177
Weighted average number of ordinary shares outstanding used in calculating diluted income per share	135,180,642	135,180,642	135,077,172	138,211,177
Income per share - basic
Net income from continuing operations	$ 0.11	0.70	0.61	0.94
Net income from discontinued operations	$ 0.04	0.22	0.03	0.01
Income per share - basic	$ 0.15us-gaap_EarningsPerShareBasic	0.92us-gaap_EarningsPerShareBasic	0.64us-gaap_EarningsPerShareBasic	0.95us-gaap_EarningsPerShareBasic
Income per share - diluted
Net income from continuing operations	$ 0.11	0.70	0.61	0.94
Net income from discontinued operations	$ 0.04	0.22	0.03	0.01
Income per share - diluted	$ 0.15us-gaap_EarningsPerShareDiluted	0.92us-gaap_EarningsPerShareDiluted	0.64us-gaap_EarningsPerShareDiluted	0.95us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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