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Employee Defined Contribution Plan - Additional Information (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 China [Member] USD ($)	Dec. 31, 2014 China [Member] CNY	Dec. 31, 2013 China [Member] CNY	Dec. 31, 2012 China [Member] CNY	Dec. 31, 2014 SINGAPORE CNY	Dec. 31, 2013 SINGAPORE CNY	Dec. 31, 2012 SINGAPORE CNY
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions to defined contribution plans	$ 2,061us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_CN	12,789us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_CN	30,252us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_CN	12,189us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_CN		106us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_SG	108us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_StatementGeographicalAxis = country_SG

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

+ Details

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