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Organization and Principal Activities - Additional Information (Parenthetical) (Detail) (Tianjin Gopher Asset Management Co., Ltd.)	Dec. 31, 2014
Tianjin Gopher Asset Management Co., Ltd.
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Equity interest sold to Gopher Asset	100.00%noah_EquityMethodInvestmentOwnershipPercentageSold / dei_LegalEntityAxis = noah_TianjinGopherAssetManagementCoLtdMember

X

- Definition

Equity Method Investment, Ownership Percentage Sold

+ References

No definition available.

+ Details

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Namespace Prefix:	noah_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration