Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Billing Status, Type [Axis] Billing Status, Type [Axis] Accounts Payable Purchase of Property Plant And Equipment Accounts Payable Purchase of Property Plant And Equipment Payable for purchases of property and equipment Accounts Receivable [Member] Accounts Receivable Accounts Receivable, Net, Current Accounts receivable, net of allowance for doubtful accounts Accounts receivable, net of allowance for doubtful accounts of nil as of December 31, 2014 and December 31, 2015 Accrued Income Taxes, Current Income tax payable Income tax payable (including income tax payable of the consolidated VIEs without recourse to Noah Holdings Ltd. of RMB28,035,249 and RMB55,966,327 as of December 31, 2014 and December 31, 2015, respectively) The total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Liabilities And Employee Related Liabilities, Current Accrued payroll and welfare expenses Accrued payroll and welfare expenses (including accrued payroll and welfare expense of the consolidated VIEs without recourse to Noah Holdings Ltd. of RMB68,617,341 and RMB181,685,160 as of December 31, 2014 and December 31, 2015, respectively) Accrued Liabilities, Current Accrued expenses Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Accumulated other comprehensive income Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-in Capital Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustment to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Adopted Accounting Pronouncements [Policy Text Block] Adopted Accounting Pronouncements [Policy Text Block] Accounting Pronouncement Adopted in 2015 After Modification [Member] After Modification [Member] After Modification Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Reversals Allowance for Doubtful Accounts Receivable, Reversals Reversal of allowance provided Allowance for Loan and Lease Losses, Write-offs Charge-offs Allowance for Loan Losses, Percentage Allowance for Loan Losses, Percentage Loan loss provision rate Allowance For Loan Losses Roll forward [Table Text Block] Allowance For Loan Losses Roll forward [Table Text Block] Activity in Allowance for Loan Losses Allowance for Notes, Loans and Financing Receivable, Current Loans receivable, allowance for loan losses Allowance for loan losses Amendment [Axis] Amendment [Axis] Amendment [Axis] Amendment [Domain] Amendment [Domain] Amendment [Domain] Amendment Flag Amendment Flag American Depositary Share [Member] American Depositary Share [Member] American Depositary Share American Depository Shares to Shares Ratio American Depository Shares to Shares Ratio Number of ADS that each ordinary share represents Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries Restricted net assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities excluded from computation of earnings per share Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Asset Management Industry [Member] Asset Management Industry [Member] Asset Management Business Assets Total assets Total assets Assets [Abstract] ASSETS Assets, Current Total current assets Assets, Current [Abstract] Current assets Current assets: Assets, Fair Value Disclosure, Nonrecurring Assets reported at fair value on a non-recurring basis Assets, Total [Member] Total Assets Available-for-sale Securities Available-for-sale investments Available-for-sale Securities, Amortized Cost Basis Amortized cost of the available-for-sale investments Available-for-sale Securities, Current Available for sale investments Available-for-sale Securities, Noncurrent Available-for-sale investments - Available-for-sale investments Available for sale investments Award Type [Axis] Award Type [Axis] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Before Modification [Member] Before Modification [Member] Before Modification Beijing Sequoia Heyuan Capital Investment Fund Limited Partnership [Member] Beijing Sequoia Heyuan Capital Investment Fund Limited Partnership [Member] Beijing Sequoia Heyuan Capital Investment Fund Limited Partnership Beijing Sequoia Mingde Capital Investment Fund Limited Partnership Beijing Sequoia Mingde Capital Investment Fund Limited Partnership [Member] Beijing Sequoia Mingde Capital Investment Fund Limited Partnership [Member] Beijing Shengyi Technology And Art Company Limited [Member] Beijing Shengyi Technology And Art Company Limited [Member] Beijing Shengyi Technology And Art Company Limited [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition Outstanding Shares Reduced Ownership Percentage Business Acquisition Outstanding Shares Reduced Ownership Percentage Percentage of share ownership diluted Business Acquisition, Percentage of Voting Interests Acquired Equity interest sold to Gopher Asset Percentage of equity shares Business Combination Allocation of Purchase Price [Line Items] Business Combination Allocation of Purchase Price [Line Items] Business Combination Allocation of Purchase Price [Line Items] Business Combination Allocation of Purchase Price [Table] Business Combination Allocation of Purchase Price [Table] Business Combination Allocation of Purchase Price [Table] Business Combination, Consideration Transferred Purchase price Business Combinations [Abstract] Business Combinations [Abstract] Business Tax And Surcharges Business Tax And Surcharges Less: business taxes and related surcharges Business Tax And Surcharges Rate Business Tax And Surcharges Rate Business tax and related surcharges Business Tax, Policy Business Tax, Policy [Policy Text Block] Business Tax and Related Surcharges Capital Expenditures Incurred but Not yet Paid Purchase of property and equipment in accounts payable Capitalized Computer Software, Gross Software Carrying Amount and Maximum Exposure to Loss for Equity Method Investments [Table Text Block] Carrying Amount and Maximum Exposure to Loss for Equity Method Investments [Table Text Block] Summary of Maximum Exposure to Loss Associated with Identified Nonconsolidated VIEs Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents-end of the period Cash and cash equivalents-beginning of the period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net (decrease) increase in cash and cash equivalents Net increases in cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash investing and financing activities: Change in noncontrolling interests. Change in Noncontrolling Interest Non-controlling interest capital injection Chongqing Gopher Longxin Equity Investment Management Company Limited Chongqing Gopher Longxin Equity Investment Management Company Limited [Member] Chongqing Gopher Longxin Equity Investment Management Co., Ltd. Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Class of Stock [Domain] Class of Stock [Domain] Class of Treasury Stock [Table] Class of Treasury Stock [Table] CHINA CHINA Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments Disclosure [Text Block] Commitments Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Common Stock, Dividends, Per Share, Declared Cash dividend declared Common Stock [Member] Ordinary Shares Common Stock, Par or Stated Value Per Share Ordinary shares, par value Common Stock, Shares Authorized Ordinary shares, shares authorized Common Stock, Shares, Issued Ordinary shares, shares issued Common Stock, Shares, Outstanding Ordinary shares, shares outstanding Common Stock, Value, Issued Ordinary shares (US$0.0005 par value): 94,100,000 shares authorized, 29,123,118 shares issued and 28,055,302 shares outstanding as of December 31, 2014 and 29,317,611 shares issued and 28,071,538 shares outstanding as of December 31, 2015 Compensation and Employee Benefit Plans [Text Block] Employee Benefit Plans Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Compensation Related Costs, Policy [Policy Text Block] Compensation and benefits Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Noah Holdings Limited shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive income attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Comprehensive Income, Policy [Policy Text Block] Comprehensive Income Computation of Earnings Per Share [Line Items] Computation of Earnings Per Share [Line Items] Computation of Earnings Per Share [Line Items] Computer Software, Intangible Asset [Member] Software Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Percentage Concentration risk, percentage Concentration Risk Type [Domain] Concentration Risk Type [Domain] Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Financial Information of Parent Company Only Disclosure [Text Block] Additional Financial Information of Parent Company - Financial Statements Schedule I Condensed Financial Information of Subsidiaries Disclosure [Abstract] Condensed Financial Information of Subsidiaries Disclosure [Abstract] Condensed Financial Information of Subsidiaries Disclosure [Abstract] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Condensed Statement of Comprehensive Income [Table] Condensed Statement of Comprehensive Income [Table] Condensed Statement of Income Captions [Line Items] Condensed Statement of Income Captions [Line Items] Consolidation, Policy [Policy Text Block] Principles of Consolidation Construction in Progress, Gross Construction in progress Contracts Expiration Month and Year Contracts Expiration Month and Year Interest-free loans agreements expiry date Conversion Of Common Stock Conversion Ratio Conversion Of Common Stock Conversion Ratio Conversion of Class B into Class A ordinary shares ratio Convertible Debt [Member] Convertible notes (Notes) Convertible Notes Payable, Noncurrent Convertible notes Cost Method Investments Long-term investment - cost method investment, Carrying Value Cost Method Investments, Fair Value Disclosure Long-term investment - cost method investment, Fair Value Costs and Expenses Total operating cost and expenses Total operating cost and expenses Total operating cost and expenses Costs and Expenses [Abstract] Operating cost and expenses Operating cost and expenses: Counterparty Name [Axis] Counterparty Name [Axis] Credit Concentration Risk [Member] Credit Concentration Risk Current Fiscal Year End Date Current Fiscal Year End Date Current Income Tax Expense (Benefit) Current Tax Customer Advances, Current Advance from customers Debt and Financial Instruments [Line Items] Debt and Financial Instruments [Line Items] Debt and Financial Instruments [Line Items] Debt Conversion, Original Debt, Amount Amount of convertible notes converted Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Convertible Notes Debt Instrument, Convertible, Conversion Price Debt instrument, initial conversion price Debt Instrument, Convertible, Conversion Ratio Debt Instrument, initial conversion rate Debt Instrument, Face Amount Debt instrument, face amount Debt Instrument, Frequency of Periodic Payment Debt Instrument, frequency of periodic payment Debt Instrument, Interest Rate, Stated Percentage Debt instrument, interest rate Debt Instrument, Maturity Date Debt instrument, maturity date Debt Instrument Repurchase Price Percentage Of Principal Amount Debt Instrument Repurchase Price Percentage Of Principal Amount Debt Instrument, repurchase price as a percentage of principal amount Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Issuance Cost Debt issuance costs Debt Securities [Member] Debt Securities of Certain Real Estate Funds Deferred Income Tax Expense (Benefit) Deferred Tax Deferred Tax Liabilities, Gross Total deferred tax liabilities Deferred Revenue Deferred revenue from related parties Deferred Revenue, by Arrangement, Disclosure [Table Text Block] Deferred Revenues Related to Recurring Management Fee Received in Advance from Related Parties Deferred Revenue, Current Deferred revenues (including deferred revenue of the consolidated VIEs without recourse to Noah Holdings Ltd. of RMB37,883,923 and RMB29,021,820 as of December 31, 2014 and December 31, 2015, respectively) Deferred revenue Deferred revenues Deferred Revenue Disclosure [Abstract] Deferred Revenue Disclosure [Abstract] Deferred Tax Assets And Liabilities [Line Items] Deferred Tax Assets And Liabilities [Line Items] Deferred Tax Assets And Liabilities [Line Items] Deferred Tax Assets And Liabilities [Table] Deferred Tax Assets And Liabilities [Table] Deferred Tax Assets And Liabilities [Table] Deferred Tax Assets, Gross Gross deferred tax assets Deferred Tax Assets, Gross [Abstract] Deferred tax assets: Deferred Tax Assets, Net of Valuation Allowance Net deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Current Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Non-current Non-current deferred tax assets Deferred Tax Assets, Operating Loss Carryforwards Tax loss carry forward Deferred Tax Assets, Other Others Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Accrued expenses Deferred Tax Assets, Unrealized Losses on Trading Securities Unrealized other income Deferred Tax Assets, Valuation Allowance Deferred tax asset allowance Valuation allowance Deferred Tax Liabilities, Gross [Abstract] Deferred tax liabilities: Deferred Tax Liabilities, Net, Current Deferred tax liabilities Deferred Tax Liabilities, Gross, Current Current Deferred Tax Liabilities, Gross, Noncurrent Non-current Deferred Tax Liabilities, Unrealized Gains on Trading Securities Unrealized investment income Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries Unrecognized deferred tax liabilities Defined Benefit Plan, Contributions by Employer Contribution for multi-employer defined contribution plan Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Depreciation Depreciation expense Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation Distribution Of Profits Distribution Of Profits [Text Block] Distribution of Profits Dividends Payable, Date to be Paid Dividend, date to be paid Dividends, Cash Cash dividend paid Dividends Payable, Date of Record Dividend, date of record Dividend Withholding Tax Rate Dividend Withholding Tax Rate Withholding income tax rate Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Information [Line Items] Document Information [Line Items] Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Document Type Document Type Donation Payments Made During Period Donation Payments Made During Period Donations Doubtful [Member] Doubtful Due from Affiliate, Current Due from subsidiaries and VIEs Due from Related Parties Amounts due from related parties Due from Related Parties, Current Amounts due from related parties Due From Related Parties Due From Related Parties [Table Text Block] Amounts Due from Related Parties Due to Affiliate, Current Amounts due to the Group's subsidiaries Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic Basic Basic net income per share Earnings Per Share, Basic [Abstract] Net income per share: Earnings Per Share, Diluted Diluted Diluted net income per share Earnings Per Share, Policy [Policy Text Block] Net Income per Share Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Text Block] Net Income per Share Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent, Total Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Income tax rate PRC income tax rate Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Deferred tax asset allowance rate Effect of deferred tax asset allowance