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Noah Investments Subsidiaries (Detail) | 12 Months Ended
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Dec. 31, 2014
Gopher Asset Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Feb. 09, 2012 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_GopherAssetManagementCoLtdMember |
Shanghai Noah Investment Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Aug. 26, 2005 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_ShanghaiNoahInvestmentManagementCoLtdMember |
Noah Upright (Shanghai) Fund Investment Consulting Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Sep. 29, 2007 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_NoahUprightShanghaiMutualFundSalesInvestmentConsultingCompanyLimitedMember |
Shanghai Noah Rongyao Insurance Broker Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Sep. 24, 2008 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_ShanghaiNoahRongyaoInsuranceBrokerCompanyLimitedMember |
Tianjin Gopher Asset Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Mar. 18, 2010 | [1]
Place of Incorporation | PRC | [1]
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_TianjinGopherAssetManagementCoLtdMember | [1]
Shanghai Gopher Blue Ray Investment Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Aug. 15, 2012 |
Place of Incorporation | PRC |
Percentage of Ownership | 60.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_ShanghaiGopherBlueRayInvestmentManagementCoLtdMember |
Wuhu Gopher Asset Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Oct. 10, 2012 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember |
Shanghai Gopher Asset Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Dec. 14, 2012 |
Place of Incorporation | PRC |
Percentage of Ownership | 100.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_ShanghaiGopherAssetManagementCoLtdMember |
Zhejiang Vanke Noah Assets Management Co., Ltd. |  |
Variable Interest Entity [Line Items] |  |
Date of Incorporation | Mar. 22, 2013 |
Place of Incorporation | PRC |
Percentage of Ownership | 51.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = noah_ZhejiangVankeNoahAssetsManagementCompanyLimitedMember |
[1] | In March 2012, Noah Investment acquired 100% equity interest of Tianjin Gopher Asset Management Co., Ltd ("Tianjin Gopher") and Gopher Asset Management Co., Ltd ("Gopher Asset") which was established in February 2012 from Shanghai Noah Financial Services Co., Ltd. at cost. The transaction was recorded as reorganization between entities under common control with no impact on the consolidated financial statements.

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