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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName EAGLE SERIES TRUST
Prospectus Date rr_ProspectusDate Mar. 01, 2016
Eagle Investment Grade Bond Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading SUMMARY OF INVESTMENT GRADE BOND FUND  |  3.1.2016
Objective [Heading] rr_ObjectiveHeading Investment objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Eagle Investment Grade Bond Fund (“Investment Grade Bond Fund” or the “fund”) seeks current income and preservation of capital.
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 Investment Grade Bond 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 41 of the fund’s Prospectus and on page 29 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 28, 2017
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 82% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 82.00%
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. If you sell Class C shares less than one year after purchase, you will pay a 1% CDSC 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 41 of the fund’s Prospectus and on page 29 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 Class A, Class C, Class I, Class R-3, Class R-5 and Class R-6 shares through February 28, 2017. 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 During normal market conditions, the Investment Grade Bond Fund seeks to achieve its objective by investing at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in a portfolio of U.S. and foreign investment grade fixed income instruments of varying maturities. Investment grade is defined as securities rated BBB- or better by Standard & Poor’s Rating Services or an equivalent rating by at least one other nationally recognized statistical rating organization or, for unrated securities, those that are determined to be of equivalent quality by the fund’s portfolio managers. The average portfolio duration of the fund is expected to vary and may generally range anywhere from two to seven years based upon economic and market conditions. The fund’s strategy is to actively allocate assets among market sectors. The fund expects to invest in a variety of fixed income securities including, but not limited to:
  • corporate debt securities of U.S. and non-U.S. issuers, including corporate commercial paper;
  • bank certificates of deposit;
  • debt securities issued by states or local governments and their agencies;
  • obligations of non-U.S. governments and their subdivisions, agencies and government sponsored enterprises;
  • obligations of international agencies or supranational entities (such as the European Union);
  • obligations issued or guaranteed by the U.S. government and its agencies;
  • mortgage-backed securities and asset-backed securities;
  • commercial real estate securities; and
  • floating rate instruments.
In addition, the fund may invest a portion of its assets in lower-rated corporate bonds (commonly referred to as “junk bonds”) and other fixed income securities that focus on delivering high income. The fund may sell securities when the portfolio managers believe that they no longer meet the fund’s investment criteria.
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 values of most debt securities held by the fund may be affected by changing interest rates and by changes in the effective maturities and credit ratings of these securities. For example, the values of debt securities in the fund’s portfolio generally will decline when interest rates rise and increase when interest rates fall. As a result, the fund’s net asset value (“NAV”) may also increase or decrease. An investment in the fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Investments in this fund are subject to the following primary risks:
  • Call risk is the possibility that, as interest rates decline, issuers of callable bonds may call fixed income securities with high interest rates prior to their maturity dates, which may force a fund to invest the unanticipated proceeds at lower interest rates, resulting in a decline in the fund’s income;
  • Credit risk arises if an issuer of a fixed income security is unable to meet its financial obligations or goes bankrupt;
  • Fixed income market risk is the risk that market conditions or other events that impact fixed income issuers, including adverse issuer, political, regulatory, market, economic or other developments that may cause broad changes in market value, public perceptions concerning these developments, and adverse investor sentiment, will have an adverse effect on the fund. Events in the fixed income markets may lead to periods of volatility, unusual liquidity issues and, in some cases, credit downgrades and increased likelihood of default. Such events may cause the value of securities owned by the fund to go up or down, sometimes rapidly or unpredictably, and may lead to increased redemptions, which could cause the fund to experience a loss when selling securities to meet redemption requests by shareholders;
  • Floating rate securities generally are less sensitive to interest rate changes but may decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline;
  • Foreign security risk is the risk of instability in currency exchange rates, political unrest, economic conditions 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. Governments on whose support a supranational entity depends for its financial backing or repayment may be unable or unwilling to provide that support;
  • High-yield security risk results from investments in below investment grade bonds, which have a greater risk of loss, are susceptible to rising interest rates and have greater volatility. Investments in high-yield securities (commonly referred to as “junk bonds”) are inherently speculative;
  • Inflation risk is the risk that high rates of inflation or changes in the market’s inflation expectations may adversely affect the market value of inflation-sensitive securities;
  • Interest rate risk is the risk that the value of a fund’s investments in fixed income securities will fall when interest rates rise. As of the date of this Prospectus, interest rates are near historic lows, but may rise significantly and/or rapidly, potentially resulting in substantial losses to the fund. The effect of increasing interest rates is more pronounced for any intermediate- or longer-term fixed income obligations owned by the fund;
  • 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;
  • Mortgage- and asset-backed security risk, which is possible in an unstable or depressed housing market, arises from the potential for mortgage failure, premature repayment of principal, or a delay in the repayment of principal;
  • Municipal securities risk is the possibility that a municipal security’s value, interest payments or repayment of principal could be affected by economic, legislative or political changes. Municipal securities are also subject to potential volatility in the municipal market and the fund’s share price, yield and total return may fluctuate in response to municipal bond market movements;
  • 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;
  • Redemption risk is the risk that, due to a rise in interest rates or other changing government policies that may cause investors to move out of fixed income securities on a large scale, the fund may experience periods of heavy redemptions that could cause the fund to sell assets at inopportune times or at a loss or depressed value; and
  • U.S. government securities and government-sponsored enterprises risk arises because a security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed by the applicable entity only as to the timely payment of interest and principal when held to maturity. The market prices for such securities are not guaranteed and will fluctuate. Securities held by an underlying fund that are issued by government-sponsored enterprises, such as the Federal National Mortgage Association (“Fannie Mae”), the Federal Home Loan Mortgage Corporation (“Freddie Mac”), Federal Home Loan Banks, Federal Farm Credit Banks, and the Tennessee Valley Authority are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government. U.S. Government securities and securities of government sponsored enterprises are also subject to credit risk, interest rate risk and market risk.
Risk Lose Money [Text] rr_RiskLoseMoney The greatest risk of investing in this fund is that you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
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 One Year or Less [Text] rr_PerformanceOneYearOrLess No performance information is presented for Class R-6 shares because Class R-6 shares for this fund have not been in existence for a full calendar year.
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 bar chart and table 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 bar chart and table 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
2.70%
September 30, 2011
Worst Quarter
(1.73)%
June 30, 2013
Performance Table Heading rr_PerformanceTableHeading Average annual total returns
(for the periods ended December 31, 2015):

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 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”).
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 No performance information is presented for Class R-6 shares because Class R-6 shares for this fund have not been in existence for a full calendar year. Current performance data as of the most recent month-end may be found on 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 Investment Grade Bond Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.75%
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 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.81%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.36%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.51%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.85%
Year 1 rr_ExpenseExampleYear01 $ 459
Year 3 rr_ExpenseExampleYear03 741
Year 5 rr_ExpenseExampleYear05 1,045
Year 10 rr_ExpenseExampleYear10 $ 1,906
2011 rr_AnnualReturn2011 5.64%
2012 rr_AnnualReturn2012 3.40%
2013 rr_AnnualReturn2013 (1.83%)
2014 rr_AnnualReturn2014 2.36%
2015 rr_AnnualReturn2015 0.68%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2011
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.70%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.73%)
1-yr rr_AverageAnnualReturnYear01 (3.11%)
5-yr rr_AverageAnnualReturnYear05 1.24%
Lifetime rr_AverageAnnualReturnSinceInception 1.65%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond 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% [1]
Redemption Fee rr_RedemptionFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.82%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.12%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.47%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.65%
Year 1 rr_ExpenseExampleYear01 $ 268
Year 3 rr_ExpenseExampleYear03 619
Year 5 rr_ExpenseExampleYear05 1,096
Year 10 rr_ExpenseExampleYear10 $ 2,415
1-yr rr_AverageAnnualReturnYear01 (0.13%)
5-yr rr_AverageAnnualReturnYear05 1.20%
Lifetime rr_AverageAnnualReturnSinceInception 1.49%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond 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 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.79%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.09%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.49%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.60%
Year 1 rr_ExpenseExampleYear01 $ 61
Year 3 rr_ExpenseExampleYear03 298
Year 5 rr_ExpenseExampleYear05 553
Year 10 rr_ExpenseExampleYear10 $ 1,285
1-yr rr_AverageAnnualReturnYear01 0.93%
5-yr rr_AverageAnnualReturnYear05 2.28%
Lifetime rr_AverageAnnualReturnSinceInception 2.58%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond 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 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses rr_OtherExpensesOverAssets 0.89%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.69%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.54%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.15%
Year 1 rr_ExpenseExampleYear01 $ 117
Year 3 rr_ExpenseExampleYear03 480
Year 5 rr_ExpenseExampleYear05 867
Year 10 rr_ExpenseExampleYear10 $ 1,953
1-yr rr_AverageAnnualReturnYear01 0.37%
5-yr rr_AverageAnnualReturnYear05 1.71%
Lifetime rr_AverageAnnualReturnSinceInception 2.01%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond 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 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.71%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.01%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.41%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.60%
Year 1 rr_ExpenseExampleYear01 $ 61
Year 3 rr_ExpenseExampleYear03 281
Year 5 rr_ExpenseExampleYear05 518
Year 10 rr_ExpenseExampleYear10 $ 1,199
1-yr rr_AverageAnnualReturnYear01 0.88%
5-yr rr_AverageAnnualReturnYear05 2.23%
Lifetime rr_AverageAnnualReturnSinceInception 2.53%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond 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 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.69% [3]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.99%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.49%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.50%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses are estimated for the current fiscal year.
Year 1 rr_ExpenseExampleYear01 $ 51
Year 3 rr_ExpenseExampleYear03 266
Year 5 rr_ExpenseExampleYear05 499
Year 10 rr_ExpenseExampleYear10 $ 1,168
Eagle Investment Grade Bond Fund | After Taxes on Distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1-yr rr_AverageAnnualReturnYear01 (3.74%)
5-yr rr_AverageAnnualReturnYear05 0.58%
Lifetime rr_AverageAnnualReturnSinceInception 0.97%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond Fund | After Taxes on Distributions and Sale of Fund Shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1-yr rr_AverageAnnualReturnYear01 (1.76%)
5-yr rr_AverageAnnualReturnYear05 0.75%
Lifetime rr_AverageAnnualReturnSinceInception 1.05%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2010
Eagle Investment Grade Bond Fund | Barclays Capital U.S. Intermediate Government/Credit Bond Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1-yr rr_AverageAnnualReturnYear01 1.07%
5-yr rr_AverageAnnualReturnYear05 2.58%
Lifetime rr_AverageAnnualReturnSinceInception 2.89%
[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. If you sell Class C shares less than one year after purchase, you will pay a 1% CDSC 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 28, 2017 as follows: Class A - 0.85%, Class C - 1.65%, Class I - 0.60%, Class R-3 - 1.15%, Class R-5 - 0.60%, and Class R-6 - 0.50%. 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.
[3] Other expenses are estimated for the current fiscal year.