Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

EAGLE SERIES TRUST

Prospectus Date

rr_ProspectusDate

Mar. 01, 2015

Eagle International Stock Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

SUMMARY OF INTERNATIONAL STOCK FUND |  3.1.2015

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Eagle International Stock Fund (“International Stock Fund” or the “fund”) seeks capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and expenses of the fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The tables that follow describe the fees and expenses that you may pay if you buy and hold shares of the International Stock Fund. You may qualify for sales discounts if you and your family invest, or agree to invest in the future, at least $25,000 in the Class A shares of the Eagle Family of Funds. More information about these and other discounts is available from your financial professional, on page 35 of the fund’s Prospectus and on page 27 of the fund’s Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees
(fees paid directly from your investment):

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 expense example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 96% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

96.00%

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

If you purchased $1,000,000 or more of Class A shares of an Eagle mutual fund that were not otherwise eligible for a sales charge waiver and sell the shares within 18 months from the date of purchase, you may pay up to a 1% contingent deferred sales charge at the time of sale.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales discounts if you and your family invest, or agree to invest in the future, at least $25,000 in the Class A shares of the Eagle Family of Funds. More information about these and other discounts is available from your financial professional, on page 35 of the fund’s Prospectus and on page 27 of the fund’s Statement of Additional Information.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

25,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense 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 assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same, except that the example reflects the fee waiver/expense reimbursement arrangement for each share class. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal investment strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The International Stock Fund invests, under normal market conditions, at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of companies economically tied to countries outside of the U.S. Equity securities include common and preferred stocks, warrants or rights exercisable into common or preferred stock, convertible preferred stock, American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and European Depositary Receipts (“EDRs”). Issuers considered to be economically tied to countries outside of the U.S. include, without limitation: (1) an issuer organized under the laws of or maintaining a principal office or principal place(s) of business outside of the U.S.; (2) an issuer of securities that are principally traded in one or more markets outside the U.S.; (3) an issuer that derives or is currently expected to derive 50% or more of its total sales, revenues, profits, earnings, growth, or another measure of economic activity from, the production or sale of goods or performance of services or making of investments or other economic activity in, outside of the U.S., or that maintains or is currently expected to maintain 50% or more of its employees, assets, investments, operations, or other business activity outside of the U.S.; (4) a governmental or quasi-governmental entity of a country outside of the U.S.; or (5) any other issuer that the subadviser believes may expose the fund’s assets to the economic fortunes and risks of a country or countries outside of the U.S. The fund’s benchmark is the MSCI EAFE® Index which measures large- and mid-cap equity performance across 21 of 23 developed countries, excluding the U.S. and Canada.

In selecting securities for the fund, the subadviser utilizes quantitative tools to implement a “bottom-up,” fundamentally based, investment process. The subadviser constructs a portfolio that seeks to maximize expected return, subject to constraints designed to meet long-run expected active risk goals.

The fund may invest in exchange traded funds (“ETFs”) in order to equitize cash positions, seek exposure to certain markets or market sectors and to hedge against certain market movements. The fund may sell securities when they no longer meet the portfolio managers’ investment criteria and/or to take advantage of more attractive investment opportunities.

Risk [Heading]

rr_RiskHeading

Principal risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The greatest risk of investing in this fund is that you could lose money. The fund invests primarily in common stocks whose values increase and decrease in response to the activities of the companies that issued such stocks, general market conditions and/or economic conditions. As a result, the fund’s net asset value (“NAV”) may also increase or decrease. Investments in this fund are subject to the following primary risks:

• Equity securities are subject to stock market risk. In addition, common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company. Preferred stocks and convertible preferred stocks are sensitive to movements in interest rates. Investing in depositary receipts entails substantially the same risks as direct investment in foreign securities. Rights and warrants do not carry dividend or voting rights with respect to the underlying securities or any rights in the assets of the issuer, and a right or a warrant ceases to have value if it is not exercised prior to its expiration date;

• Foreign security risk is the risk of instability in currency exchange rates, political unrest, economic conditions, custodial arrangements or foreign law changes. The risks associated with investments in governmental or quasi-governmental entities of a foreign country are heightened by the potential for unexpected governmental change and inadequate government oversight. Foreign security risk may also apply to ADRs, GDRs and EDRs;

• Growth stock risk is the risk of a lack of earnings increase or lack of dividend yield;

• Liquidity risk is the possibility that, during times of widespread market turbulence, trading activity in certain securities may be significantly hampered, which may reduce the returns of the fund because it may be unable to sell the securities at an advantageous price or time;

• Market timing risk arises because certain types of securities in which the fund invests, including foreign securities, could cause the fund to be at greater risk of market timing activities by fund shareholders;

• Investing in other investment companies and ETFs carries with it the risk that, by investing in another investment company or ETF, the fund, and therefore its shareholders, indirectly bear the fund’s proportionate share of the fees and expenses paid by shareholders of the other investment company or ETF, in addition to the fees and expenses fund shareholders directly bear in connection with the fund’s own operations;

• Portfolio turnover risk is the risk that performance may be adversely affected by a high rate of portfolio turnover, which generally leads to greater transaction and tax costs;

• Sector risk is the risk associated with the fund holding a core portfolio of stocks invested in similar businesses, all of which could be affected by the same economic or market conditions; and

• Stock market risk is the risk of broad stock market decline or volatility or a decline in particular holdings in response to adverse issuer, political, regulatory, market, economic or other developments, public perceptions concerning these developments, and adverse investor sentiment.

Risk Lose Money [Text]

rr_RiskLoseMoney

The greatest risk of investing in this fund is that you could lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart that follows illustrates annual fund returns for the periods ended December 31. The table that follows compares the fund’s returns for various periods with benchmark returns. This information is intended to give you some indication of the risk of investing in the fund by demonstrating how its returns have varied over time. The bar chart shows the fund’s Class A share performance from one year to another. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. To obtain more current performance data as of the most recent month-end, please visit our website at eagleasset.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

This information is intended to give you some indication of the risk of investing in the fund by demonstrating how its returns have varied over time.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

eagleasset.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the preceding tables do not reflect sales charges. If the sales charges were reflected, the returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the preceding tables do not reflect sales charges. If the sales charges were reflected, the returns would be lower than those shown.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During performance period	Return	Quarter Ended
(Class A shares):
Best Quarter	9.86%	September 30, 2013
Worst Quarter	(5.29)%	September 30, 2014

Performance Table Heading

rr_PerformanceTableHeading

Average annual total returns
(for the periods ended December 31, 2014):

Fund return (after deduction of sales charges and expenses)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historically 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 shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) plan or individual retirement account (“IRA”).

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown for Class A only and after-tax returns for Class C, Class I, Class R-3, Class R-5, and Class R-6 will vary.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

The return after taxes on distributions and sale of fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of fund shares at the end of the measurement period.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

To obtain more current performance data as of the most recent month-end, please visit our website at eagleasset.com.

After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual 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 fund shares through tax-deferred arrangements, such as a 401(k) plan or individual retirement account (“IRA”). After-tax returns are shown for Class A only and after-tax returns for Class C, Class I, Class R-3, Class R-5, and Class R-6 will vary. The return after taxes on distributions and sale of fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of fund shares at the end of the measurement period.

Eagle International Stock Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

4.86%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

5.98%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.39%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.59%

Year 1

rr_ExpenseExampleYear01

629

Year 3

rr_ExpenseExampleYear03

1,796

Year 5

rr_ExpenseExampleYear05

2,939

Year 10

rr_ExpenseExampleYear10

5,702

2014

rr_AnnualReturn2014

(3.92%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2013

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

9.86%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2014

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.29%)

1-yr

rr_AverageAnnualReturnYear01

(8.47%)

Lifetime

rr_AverageAnnualReturnSinceInception

4.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

4.83%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

6.70%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.33%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

2.37%

Year 1

rr_ExpenseExampleYear01

340

Year 3

rr_ExpenseExampleYear03

1,592

Year 5

rr_ExpenseExampleYear05

2,898

Year 10

rr_ExpenseExampleYear10

5,975

1-yr

rr_AverageAnnualReturnYear01

(4.70%)

Lifetime

rr_AverageAnnualReturnSinceInception

6.30%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.58%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

5.45%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.28%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.17%

Year 1

rr_ExpenseExampleYear01

119

Year 3

rr_ExpenseExampleYear03

1,246

Year 5

rr_ExpenseExampleYear05

2,362

Year 10

rr_ExpenseExampleYear10

5,110

1-yr

rr_AverageAnnualReturnYear01

(3.48%)

Lifetime

rr_AverageAnnualReturnSinceInception

7.64%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | Class R-3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

4.87%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

6.24%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.49%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.75%

Year 1

rr_ExpenseExampleYear01

178

Year 3

rr_ExpenseExampleYear03

1,450

Year 5

rr_ExpenseExampleYear05

2,692

Year 10

rr_ExpenseExampleYear10

5,663

1-yr

rr_AverageAnnualReturnYear01

(4.10%)

Lifetime

rr_AverageAnnualReturnSinceInception

6.99%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | Class R-5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.82%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

5.69%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.52%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.17%

Year 1

rr_ExpenseExampleYear01

119

Year 3

rr_ExpenseExampleYear03

1,293

Year 5

rr_ExpenseExampleYear05

2,450

Year 10

rr_ExpenseExampleYear10

5,274

1-yr

rr_AverageAnnualReturnYear01

(3.51%)

Lifetime

rr_AverageAnnualReturnSinceInception

7.62%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | Class R-6

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a % of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.82%

Acquired Fund Fees

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

5.69%

^[2]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.62%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.07%

Year 1

rr_ExpenseExampleYear01

109

Year 3

rr_ExpenseExampleYear03

1,284

Year 5

rr_ExpenseExampleYear05

2,442

Year 10

rr_ExpenseExampleYear10

5,269

1-yr

rr_AverageAnnualReturnYear01

(3.42%)

Lifetime

rr_AverageAnnualReturnSinceInception

7.72%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | After Taxes on Distributions | Class A

Risk/Return:

rr_RiskReturnAbstract

1-yr

rr_AverageAnnualReturnYear01

(10.32%)

Lifetime

rr_AverageAnnualReturnSinceInception

3.07%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | After Taxes on Distributions and Sale of Fund Shares | Class A

Risk/Return:

rr_RiskReturnAbstract

1-yr

rr_AverageAnnualReturnYear01

(4.02%)

Lifetime

rr_AverageAnnualReturnSinceInception

3.12%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

Eagle International Stock Fund | MCSI EAFE® Index (Lifetime period is measured from the inception date of Class A shares) (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1-yr

rr_AverageAnnualReturnYear01

(4.90%)

Lifetime

rr_AverageAnnualReturnSinceInception

6.36%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2013

[1] If you purchased $1,000,000 or more of Class A shares of an Eagle mutual fund that were not otherwise eligible for a sales charge waiver and sell the shares within 18 months from the date of purchase, you may pay up to a 1% contingent deferred sales charge at the time of sale.

[2] Eagle Asset Management, Inc. (“Eagle”) has contractually agreed to waive its investment advisory fee and/or reimburse certain expenses of the fund to the extent that: annual operating expenses of each class exceed a percentage of that class’ average daily net assets through February 29, 2016 as follows: Class A – 1.75%, Class C – 2.55%, Class I – 1.15%, Class R-3 - 1.75%, Class R-5 – 1.15%, and Class R-6 – 1.05%. This expense limitation excludes interest, taxes, brokerage commissions, costs relating to investments in other investment companies, dividends, and extraordinary expenses, and includes offset expense arrangements with the fund’s custodian. The contractual fee waiver can be changed only with the approval of a majority of the fund’s Board of Trustees. Any reimbursement of fund expenses or reduction in Eagle’s investment advisory fees is subject to reimbursement by the fund within the following two fiscal years, if overall expenses fall below the lesser of its then current expense cap or the expense cap in effect at the time of the fee reimbursement.