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v2.4.1.9

Condensed Financial Information of the Parent Company - Condensed Statements of Comprehensive Income (Detail) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY | Dec. 31, 2012 CNY | Dec. 31, 2014 Parent Company [Member] USD ($) | Dec. 31, 2014 Parent Company [Member] CNY | Dec. 31, 2013 Parent Company [Member] CNY | Dec. 31, 2012 Parent Company [Member] CNY
Operating expenses: |  |  |  |  |  |  |  |
General and administrative expenses | $ (20,912)us-gaap_GeneralAndAdministrativeExpense | (129,751)us-gaap_GeneralAndAdministrativeExpense | (82,529)us-gaap_GeneralAndAdministrativeExpense | (83,153)us-gaap_GeneralAndAdministrativeExpense | $ (1,479)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (9,178)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,125)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (14,638)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating Profit(losses) | 145,736 us-gaap_OperatingIncomeLoss | 904,235 us-gaap_OperatingIncomeLoss | 554,904 us-gaap_OperatingIncomeLoss | 298,466 us-gaap_OperatingIncomeLoss | (1,479)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (9,178)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,125)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (14,638)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Interest income | 5,590 us-gaap_InterestIncomeDepositsWithFinancialInstitutions | 34,682 us-gaap_InterestIncomeDepositsWithFinancialInstitutions | 11,082 us-gaap_InterestIncomeDepositsWithFinancialInstitutions | 5,093 us-gaap_InterestIncomeDepositsWithFinancialInstitutions | 802 us-gaap_InterestIncomeDepositsWithFinancialInstitutions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4,973 us-gaap_InterestIncomeDepositsWithFinancialInstitutions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_InterestIncomeDepositsWithFinancialInstitutions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_InterestIncomeDepositsWithFinancialInstitutions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Equity in income of subsidiaries |  |  |  |  | 121,342 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 752,885 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 457,287 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 227,519 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income before income taxes | 151,736 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 941,461 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 568,456 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 303,869 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 120,665 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 748,680 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 456,162 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 212,881 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income tax expense | 31,071 us-gaap_IncomeTaxExpenseBenefit | 192,781 us-gaap_IncomeTaxExpenseBenefit | 112,294 us-gaap_IncomeTaxExpenseBenefit | 90,988 us-gaap_IncomeTaxExpenseBenefit | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net income | 120,665 us-gaap_NetIncomeLoss | 748,680 us-gaap_NetIncomeLoss | 456,162 us-gaap_NetIncomeLoss | 212,881 us-gaap_NetIncomeLoss | 120,665 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 748,680 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 456,162 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 212,881 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other comprehensive income, net of tax of nil |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 636 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 3,946 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 1,403 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 583 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 636 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,946 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,734 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 252 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Comprehensive income | $ 121,301 us-gaap_ComprehensiveIncomeNetOfTax | 752,626 us-gaap_ComprehensiveIncomeNetOfTax | 457,565 us-gaap_ComprehensiveIncomeNetOfTax | 213,464 us-gaap_ComprehensiveIncomeNetOfTax | $ 121,301 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 752,626 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 457,896 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 213,133 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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