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Purchase Price Allocations (Detail) (Shanghai Yafu Investment Consulting Co., Ltd.)	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2014 Noah Ark (Shanghai) Financial Service Co., Ltd. USD ($)	Dec. 31, 2014 Noah Ark (Shanghai) Financial Service Co., Ltd. CNY	Dec. 31, 2014 Shanghai Noah Yijie Finance Technology Co., Ltd. USD ($)	Dec. 31, 2014 Shanghai Noah Yijie Finance Technology Co., Ltd. CNY	Dec. 31, 2014 Shanghai Noah Jintong Data Services Co., Ltd. USD ($)	Dec. 31, 2014 Shanghai Noah Jintong Data Services Co., Ltd. CNY	Dec. 31, 2014 Enoch Education Training Shanghai Co., Ltd. USD ($)	Dec. 31, 2014 Enoch Education Training Shanghai Co., Ltd. CNY
Business Combination Allocation of Purchase Price [Line Items]
Purchase price	$ 1,934,049us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	12,000,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	$ 805,854us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_NoahArkShanghaiFinancialServiceCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	5,000,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_NoahArkShanghaiFinancialServiceCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	$ 483,512us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_ShanghaiNoahYijieFinanceTechnologyCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	3,000,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_ShanghaiNoahYijieFinanceTechnologyCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	$ 483,512us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_ShanghaiNoahJintongDataServicesCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	3,000,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_ShanghaiNoahJintongDataServicesCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	$ 161,171us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_EnochEducationTrainingShanghaiCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember	1,000,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = noah_EnochEducationTrainingShanghaiCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiYafuInvestmentConsultingCompanyMember

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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