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Amounts Due from Related Parties (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Amounts due from related parties	$ 31,085,548us-gaap_DueFromRelatedParties	$ 8,924,824us-gaap_DueFromRelatedParties
Wanjia Win-Win Assets Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	8,330,419us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinInvestmentManagementLimitedMember	3,005,600us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinInvestmentManagementLimitedMember
Wuhu Gopher Asset Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	3,731,866us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember	856,879us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember
Gopher Capital GP
Related Party Transaction [Line Items]
Amounts due from related parties	3,535,483us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember	738,725us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember
Kunshan Jingzhao Equity Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	3,264,336us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember	2,704,988us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember
Shanghai Gopher Languang Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	2,244,540us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember	729,933us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember
Gopher Asset Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	1,494,061us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember
Hangzhou Vanke Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	1,054,369us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember	778,562us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember
Gopher Nuobao Asset Management Company Limited
Related Party Transaction [Line Items]
Amounts due from related parties	174,865us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherNuobaoAssetManagementCompanyLimitedMember
Chongqing Gopher Longxin Equity Investment Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	1,057us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember	1,082us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember
Shanghai Nuobang Asset Management Company Limited
Related Party Transaction [Line Items]
Amounts due from related parties	280us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiNuobangAssetManagementCompanyLimitedMember
Yiwu Xinguang Equity Investment Fund Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	7,254,174us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_YiwuXinguangEquityInvestmentFundmanagementMember
Tianjin Gopher Asset Management Co., Ltd.
Related Party Transaction [Line Items]
Amounts due from related parties	$ 98us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember	$ 109,055us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember

X

- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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

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