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CONVERTIBLE NOTE (Reconciliation of Derivative Redemption Feature Measured at Fair Value on Recurring Basis) (Detail) (Derivative redemption feature [Member], CNY)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Derivative redemption feature [Member]
 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning Balance   
Fair value of the derivative redemption feature on issuance date 22,355us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_EmbeddedDerivativeFinancialInstrumentsMember
Change in fair value of the derivative redemption feature 26,809us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_EmbeddedDerivativeFinancialInstrumentsMember
Settlement of the derivate redemption feature upon IPO (49,164)us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_EmbeddedDerivativeFinancialInstrumentsMember
Ending Balance