Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

ASTON FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 28, 2015

ASTON/SILVERCREST SMALL CAP FUND

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

ASTON/Silvercrest Small Cap Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

February 29, 2016

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

PORTFOLIO TURNOVER

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 31.68%.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

31.68%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example shows the operating expenses you would incur as a shareholder if you invested $10,000 in the Fund over the time periods shown and you redeem all your shares at the end of those periods. The example assumes that the average annual return was 5%, operating expenses remained the same and expenses were capped for one year in each period.

Although your actual costs may be higher or lower, based on the above assumptions, your costs would be:

Strategy [Heading]

rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its assets in common stocks and other equity securities of small-cap companies. The Fund considers companies with market capitalizations below $3 billion at the time of acquisition to be small-cap. The subadviser invests in companies that it believes to be undervalued at the time of purchase. These companies typically possess, in the opinion of the subadviser, one or more of the following attributes:

• Business that results in relatively consistent longer-term earnings and cash flow growth
• Franchise/asset value that may make the company attractive to potential acquirers
• Cyclically depressed earnings and/or cash flow that has potential for improvement
• A catalyst that will promote recognition of the company’s undervalued status

The Fund may also invest in securities of companies outside the small-cap range, preferred stock, convertible preferred stocks, convertible bonds and real estate investment trusts (“REITs”). The subadviser employs a strategy of diversification, and adheres to a structured sell discipline.

Risk [Heading]

rr_RiskHeading

PRINCIPAL RISKS

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

You could lose money by investing in the Fund. There can be no assurance that the Fund’s investment objective will be achieved. The following is a summary of the principal risks of investing in the Fund.

Convertible Securities Risk. Convertible preferred stocks, which are convertible into shares of the issuer’s common stock and pay regular dividends, and convertible bonds, which are convertible into shares of the issuer’s common stock and bear interest, are subject to the risks of equity securities and fixed income securities. The lower the conversion premium, the more likely the price of the convertible security will follow the price of the underlying common stock. Conversely, higher premium convertible securities are more likely to exhibit the behavior of bonds because the likelihood of conversion is lower, which may cause their prices to fall as interest rates rise.

The value of a convertible security is also affected by the credit quality of the issuer and any call provisions. There is the risk that the issuer of convertible preferred stock will not be able to make dividend payments or that the issuer of a convertible bond will not be able to make principal and/or interest payments.

Liquidity Risk. When there is no willing buyer and a security cannot be readily sold at the desired time or price, the Fund may need to accept a lower price or may not be able to sell the security at all. An inability to sell securities, at the Fund’s desired price or at all, can adversely affect the Fund’s value or prevent the Fund from being able to take advantage of other investment opportunities. Less liquid securities are more difficult to dispose of at their recorded values and are subject to wider bid-ask spreads and volatility.

Manager Risk. The performance of the Fund is dependent upon the investment adviser’s skill in selecting managers and the subadviser’s skill in making appropriate investments. As a result, the Fund may underperform its benchmark or its peers.

Market Risk. The Fund’s share price can move down in response to stock market conditions, changes in the economy or changes in a particular company’s stock price. An individual stock may decline in value even when the value of stocks in general is rising.

REIT Risk. Securities of REITs may be affected by changes in the values of their underlying properties. REITs depend generally on their ability to generate cash flow to make distributions to shareholders or unitholders, which may be subject to defaults by borrowers and self-liquidations. Some REITs may have limited diversification and may be subject to risks inherent in investments in a limited number of properties, in a narrow geographic area, or in a single property type. Real estate prices are also affected by general economic conditions. When growth is slowing, demand for property decreases and prices and rents may decline. High or rising interest rates, which result in high or rising mortgage and financing costs, may restrain buying and selling activity, reducing the appeal of real estate investments. Distributions from REITs generally are taxed as ordinary income for federal income tax purposes.

Small-Cap and Mid-Cap Company Risk. Investing in securities of small-cap and mid-cap companies may involve greater risks than investing in securities of larger, more established companies. Small-cap and mid-cap companies generally have limited product lines, markets, and financial resources. Their securities may trade less frequently and in more limited volumes than the securities of larger, more established companies. Also, small-cap and mid-cap companies are typically subject to greater changes in earnings and business prospects than larger companies. As a result, their stock prices may experience greater volatility and may decline more than those of large-cap companies in market downturns.

Value Style Risk. Value investing involves buying stocks that the subadviser believes are out of favor and/or undervalued in comparison to their peers or their prospects for growth. Typically, the valuation levels of value stocks are less than those of growth stocks. Because different types of stocks go in and out of favor with prevailing market and economic conditions, the Fund’s performance may be adversely affected when value stocks underperform.

Risk Lose Money [Text]

rr_RiskLoseMoney

You could lose money by investing in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

FUND PERFORMANCE

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart shows how the performance of the Class N shares of the Fund has varied from year to year for the periods shown. Class N shares and Class I shares are invested in the same portfolio of securities, so the annual returns would differ only to the extent that the classes have different expenses. The annual returns of the Class I shares would be higher than the returns of the Class N shares due to 12b-1 fees paid by Class N shares. This information may help illustrate the risks of investing in the Fund. The Fund makes updated performance information available on the Fund’s website, www.astonfunds.com, or by calling toll-free 800-992-8151. As with all mutual funds, past performance (before and after taxes) does not guarantee future performance.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows how the performance of the Class N shares of the Fund has varied from year to year for the periods shown.

The following table indicates how the Fund’s average annual returns for different calendar periods compared to the returns of a broad-based securities market index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-992-8151

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.astonfunds.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

As with all mutual funds, past performance (before and after taxes) does not guarantee future performance.

Bar Chart [Heading]

rr_BarChartHeading

Class N Shares
Calendar Year Total Return

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter:	03/13	12.39	%
Worst quarter:	09/14	(8.19	)%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2014)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Class N shares. After-tax returns for Class I shares will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table indicates how the Fund’s average annual returns for different calendar periods compared to the returns of a broad-based securities market index.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. After-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class N shares. After-tax returns for Class I shares will vary.

ASTON/SILVERCREST SMALL CAP FUND | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.36%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.61%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[1]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.40%

^[1],[2]

1 Year

rr_ExpenseExampleYear01

143

3 Years

rr_ExpenseExampleYear03

488

5 Years

rr_ExpenseExampleYear05

856

10 Years

rr_ExpenseExampleYear10

1,893

2012

rr_AnnualReturn2012

13.51%

2013

rr_AnnualReturn2013

36.31%

2014

rr_AnnualReturn2014

4.28%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2013

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.39%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2014

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(8.19%)

1 Year

rr_AverageAnnualReturnYear01

4.28%

Since Inception

rr_AverageAnnualReturnSinceInception

17.24%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 27, 2011

ASTON/SILVERCREST SMALL CAP FUND | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.36%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.36%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[1]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.15%

^[1],[2]

1 Year

rr_ExpenseExampleYear01

117

3 Years

rr_ExpenseExampleYear03

410

5 Years

rr_ExpenseExampleYear05

725

10 Years

rr_ExpenseExampleYear10

1,617

1 Year

rr_AverageAnnualReturnYear01

4.52%

Since Inception

rr_AverageAnnualReturnSinceInception

17.56%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 27, 2011

ASTON/SILVERCREST SMALL CAP FUND | Return After Taxes on Distributions | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.76%

Since Inception

rr_AverageAnnualReturnSinceInception

16.58%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 27, 2011

ASTON/SILVERCREST SMALL CAP FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.86%

Since Inception

rr_AverageAnnualReturnSinceInception

13.52%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 27, 2011

ASTON/SILVERCREST SMALL CAP FUND | Russell 2000 Value Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class N and Class I shares is computed from December 31, 2011.)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.22%

Since Inception

rr_AverageAnnualReturnSinceInception

18.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2011

[1] The investment adviser is contractually obligated to waive management fees and/or reimburse ordinary operating expenses, not including investment-related costs (such as brokerage commissions), interest, taxes, extraordinary expenses and acquired fund fees and expenses, through February 29, 2016, to the extent that operating expenses exceed 1.40% of the Fund's average daily net assets with respect to Class N shares and 1.15% of the Fund's average daily net assets with respect to Class I shares (the "Operating Expense Limit"). Prior to February 29, 2016, the arrangement may be amended or terminated for a class only by a vote of the Board of Trustees of Aston Funds. For a period of up to three years from the end of the fiscal year during which fees are waived or expenses are reimbursed, the investment adviser is entitled to be reimbursed by the Fund for such fees waived and expenses reimbursed from the commencement of operations through the completion of the first three full fiscal years to the extent that the Total Annual Operating Expenses for a class, not including investment-related costs (such as brokerage commissions), interest, taxes, extraordinary expenses and acquired fund fees and expenses, remain at or below the Operating Expense Limit after such reimbursement.

[2] After Fee Waiver and Reimbursement