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Deferred Revenues Related to Recurring Management Fee Received in Advance from Related Parties (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Deferred revenue from related parties	$ 13,426,881us-gaap_DeferredRevenue	$ 9,187,091us-gaap_DeferredRevenue
Shanghai Gopher Languang Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	5,189,571us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember	292,272us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember
Wuhu Gopher Investment Management Company Limited
Related Party Transaction [Line Items]
Deferred revenue from related parties	2,881,465us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherInvestmentManagementCompanyLimitedMember	924,018us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherInvestmentManagementCompanyLimitedMember
Wanjia Win-Win Assets Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	2,624,558us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember	1,774,667us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember
Gopher Asset Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	671,541us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember	1,100,107us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember
Hangzhou Vanke Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	559,587us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember	2,130,255us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember
Kunshan Jingzhao Equity Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	643,641us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember	201,902us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember
Gopher Nuobao Asset Management Company Limited
Related Party Transaction [Line Items]
Deferred revenue from related parties	383,320us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherNuobaoAssetManagementCompanyLimitedMember
Chongqing Gopher Longxin Equity Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Deferred revenue from related parties	337,917us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember	236,586us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember
Gopher Capital GP
Related Party Transaction [Line Items]
Deferred revenue from related parties	135,281us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember	576,937us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember
Sequoia Capital Investment Management Tianjin Company Limited
Related Party Transaction [Line Items]
Deferred revenue from related parties		$ 1,950,347us-gaap_DeferredRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_SequoiaCapitalInvestmentManagementTianjinCompanyLimitedMember

X

- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

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