Legal Reserves

No definition available.

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- Definition

Maximum Requirement Of Each Of Entitys Subsidiaries After Tax Profits To Be Allocated To General Reserve Fund As Percentage Of Each Subsidiaries Registered Capital

+ References

No definition available.

+ Details

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- Definition

Number Of American Depositary Shares in Each Ordinary Share

+ References

No definition available.

+ Details

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- Definition

Required Percentage of Entitys After Tax Profits to Allocate to Statutory Common Reserve

+ References

No definition available.

+ Details

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- Details

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- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e)(3)(ii))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph e

-Subparagraph 3

-Article 4

+ Details

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Disclosure of the amount of equity that is restricted to use by regulation or agreement.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

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- Details

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Distribution of Profits - Additional Information (Detail) (USD $)	0 Months Ended				12 Months Ended
	Apr. 09, 2013	Feb. 25, 2013	Apr. 15, 2012	Feb. 28, 2012	Dec. 31, 2014	Dec. 31, 2013
Workers' Compensation Insurance and Reserves [Line Items]
Profit after taxation transferred to general reserve fund					10.00%
Maximum profit after taxation transferred to general reserve fund					50.00%
General reserve fund of PRC subsidiaries					$ 15,893,941noah_LegalReserves	$ 8,638,712noah_LegalReserves
Restricted share capital of PRC subsidiaries					105,571,519us-gaap_EquityRestrictions	86,907,832us-gaap_EquityRestrictions
Restricted net assets					121,465,460	95,546,544
Cash dividend declared		$ 0.28		$ 0.28
Number of american depositary shares in each ordinary share		2		2
Dividend distribution	7,700,000us-gaap_PaymentsOfDividendsCommonStock		7,900,000us-gaap_PaymentsOfDividendsCommonStock
Dividend, date of record		Mar. 20, 2013		Mar. 20, 2012
American Depositary Shares
Workers' Compensation Insurance and Reserves [Line Items]
Cash dividend declared		$ 0.14		$ 0.14
Variable Interest Entity, Primary Beneficiary
Workers' Compensation Insurance and Reserves [Line Items]
Restricted net assets					$ 49,330,429	$ 21,254,726