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Significant Related Party Transactions (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Related Party Transaction [Line Items] |  |  |
Related party revenues | $ 132,793,592 us-gaap_RevenueFromRelatedParties | $ 77,329,868 us-gaap_RevenueFromRelatedParties | $ 25,982,724 us-gaap_RevenueFromRelatedParties
One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 29,322,581 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember | 20,841,594 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember | 9,392,131 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember
Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 90,885,669 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember | 55,508,435 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember | 16,590,593 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember
Shanghai Gopher Asset Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 9,264,250 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherAssetManagementCompanyLimitedMember |  |
Shanghai Gopher Asset Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 10,276,509 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherAssetManagementCompanyLimitedMember |  |
Shanghai Gopher Asset Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 48,654 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherAssetManagementCompanyLimitedMember |  |
Gopher Asset Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 5,093,514 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember | 2,161,933 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember | 3,866,439 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember
Gopher Asset Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 15,790,524 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember | 11,827,050 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember | 2,504,815 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember
Gopher Asset Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 10,607,614 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdMember |  |
Gopher Capital GP | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 3,502,034 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember | 20,004 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember | 159,257 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember
Gopher Capital GP | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 5,091,211 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember | 34,003 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember | 14,002 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherCapitalGroupMember
Gopher- Nuobao (Shanghai) Asset Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 2,738,586 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherNuobaoShanghaiAssetManagementCompanyLimitedMember |  |
Gopher- Nuobao (Shanghai) Asset Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 184,414 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherNuobaoShanghaiAssetManagementCompanyLimitedMember |  |
Gopher- Nuobao (Shanghai) Asset Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 11,294 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherNuobaoShanghaiAssetManagementCompanyLimitedMember |  |
Wanjia Win-Win Assets Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 2,224,784 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember | 433,024 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember |
Wanjia Win-Win Assets Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 15,333,971 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember | 5,047,542 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinAssetsManagementCompanyLimitedMember |
Wuhu Gopher Asset Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 2,168,853 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember | 5,570,754 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember | 1,226,227 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember
Wuhu Gopher Asset Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 12,925,380 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember | 10,665,773 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember | 191,757 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember
Wuhu Gopher Asset Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 336,107 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuGopherAssetManagementCompanyLimitedMember |
Shanghai Gopher Languang Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,106,637 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember | 3,489,082 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember | 819,199 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember
Shanghai Gopher Languang Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 3,301,240 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember | 4,885,604 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember | 459,439 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember
Shanghai Gopher Languang Investment Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,145,515 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember | 561,458 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherLanguangInvestmentManagementCompanyLimitedMember |
Shanghai Gopher Zhengda Damuzhi Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 582,521 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherZhengdaDamuzhiInvestmentManagementCompanyLimitedMember |  |
Shanghai Gopher Zhengda Damuzhi Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 798,399 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherZhengdaDamuzhiInvestmentManagementCompanyLimitedMember |  |
Hangzhou Sequoia Heyuan Capital Investment Fund (Limited Partnership) | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 513,558 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouSequoiaHeyuanCapitalInvestmentFundLimitedPartnershipMember | 131,164 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouSequoiaHeyuanCapitalInvestmentFundLimitedPartnershipMember | 1,024,790 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouSequoiaHeyuanCapitalInvestmentFundLimitedPartnershipMember
Hangzhou Sequoia Heyuan Capital Investment Fund (Limited Partnership) | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 906,687 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouSequoiaHeyuanCapitalInvestmentFundLimitedPartnershipMember |  |
Sequoia Capital Investment Management (Tianjin) Co., Ltd | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 481,461 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinSequoiaCapitalInvestmentFundLimitedPartnershipMember | 127,965 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinSequoiaCapitalInvestmentFundLimitedPartnershipMember | 218,860 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinSequoiaCapitalInvestmentFundLimitedPartnershipMember
Hangzhou Vanke Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 427,429 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember | 5,077,871 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember |
Hangzhou Vanke Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 6,058,713 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember | 3,151,268 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember |
Hangzhou Vanke Investment Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 10,225 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_HangzhouVankeInvestmentManagementCompanyLimitedMember |  |
Shareholder transaction | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 426,154 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShareholdersMember |  |
Shareholder transaction | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 59,481 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShareholdersMember |  |
Shareholder transaction | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 2,541 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShareholdersMember |  |
Tianjin Gopher Asset Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 403,099 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember | 31,991 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember | 645,699 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember
Tianjin Gopher Asset Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 4,082,036 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember | 3,876,955 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember | 3,622,393 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_TianjinGopherAssetManagementCoLtdMember
Kunshan Jingzhao Equity Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 248,201 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember | 717,565 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember | 215,657 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember
Kunshan Jingzhao Equity Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 2,552,337 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember | 2,742,184 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember | 2,111,583 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember
Kunshan Jingzhao Equity Investment Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,299 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_KunshanJingzhaoEquityInvestmentManagementLimitedMember |  |
Gopher RE Credit Fund SP | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 123,847 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherReCreditFundSpMember |  |
Shaoxing Sequoia Huiyuan Capital Investment Fund (Limited Partnership) | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 16,049 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShaoxingSequoiaJiyeHuiyuanCapitalInvestmentFundLimitedPartnershipMember | 359,671 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShaoxingSequoiaJiyeHuiyuanCapitalInvestmentFundLimitedPartnershipMember | 411,614 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShaoxingSequoiaJiyeHuiyuanCapitalInvestmentFundLimitedPartnershipMember
Financial Products Held By Shareholders | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,604 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsHeldByShareholdersMember | 21,906 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsHeldByShareholdersMember |
Wuhu Bona Film Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 1,037,354 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuBonaFilmInvestmentManagementLimitedMember |
Wuhu Bona Film Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,142,560 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuBonaFilmInvestmentManagementLimitedMember | 331,157 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WuhuBonaFilmInvestmentManagementLimitedMember |
Chongqing Gopher Longxin Equity Investment Management Co., Ltd. | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 807,242 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember | 748,914 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember
Chongqing Gopher Longxin Equity Investment Management Co., Ltd. | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,675,845 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember | 2,893,066 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember | 268,632 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ChongqingGopherLongxinEquityInvestmentManagementCompanyLimitedMember
Gopher investment Fund SPC | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 761,105 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherInvestmentFundSpcMember |
Gopher investment Fund SPC | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 528,338 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherInvestmentFundSpcMember |
Financial Products Invested By Group And Affiliates | One Time Commissions |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues |  | 92,962 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsInvestedByGroupAndAffiliatesMember | 55,475 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OneTimeCommissionsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsInvestedByGroupAndAffiliatesMember
Financial Products Invested By Group And Affiliates | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 313 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsInvestedByGroupAndAffiliatesMember | 1,140,375 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsInvestedByGroupAndAffiliatesMember | 1,010,330 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_FinancialProductsInvestedByGroupAndAffiliatesMember
Sequoia Capital Investment Management Tianjin Company Limited | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 8,546,576 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_SequoiaCapitalInvestmentManagementTianjinCompanyLimitedMember | 8,385,120 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_SequoiaCapitalInvestmentManagementTianjinCompanyLimitedMember | 6,407,642 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_SequoiaCapitalInvestmentManagementTianjinCompanyLimitedMember
Shanghai Gopher Investment Management Company Limited | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 1,283,681 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_ShanghaiGopherInvestmentManagementCompanyLimitedMember |  |
Beijing Sequoia Heyuan Capital Investment Fund Limited Partnership | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 850,019 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_BeijingSequoiaHeyuanCapitalInvestmentFundLimitedPartnershipMember |  |
Noah Holdings (Hong Kong) Limited | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 25,260 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_NoahHoldingsHongKongLimitedMember |  |
Gopher Asset Management Co., Ltd., Subsidiary | Recurring Service Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 513 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_RecurringServiceFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_GopherAssetManagementCoLtdSubsidiaryMember |  |
Wanjia Win-Win Assets Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | 756,696 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinInvestmentManagementLimitedMember | 82,275 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_WanjiaWinwinInvestmentManagementLimitedMember |
Yiwu Xinguang Equity Investment Fund Management Co., Ltd. | Other Service Fee |  |  |
Related Party Transaction [Line Items] |  |  |
Related party revenues | $ 1,504 us-gaap_RevenueFromRelatedParties / us-gaap_IncomeStatementLocationAxis = noah_OtherServiceFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = noah_YiwuXinguangEquityInvestmentFundmanagementMember |  |

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