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<!-- EDGAR Online I-Metrix Xcelerate Instance Document, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version:  6.20.1 -->
<!-- Round: 1 -->
<!-- Creation date: 2012-10-31T18:48:08Z -->
<!-- Copyright (c) 2005-2011 EDGAR Online, Inc. All Rights Reserved. -->
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  <dei:DocumentType contextRef="eol_0000894189-12-005908_STD_1_20120501_0" id="id_415764_3E75D2AB-D530-4125-B9AD-0901A366A65C_1_3">Other</dei:DocumentType>
  <dei:DocumentPeriodEndDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0" id="id_415764_3E75D2AB-D530-4125-B9AD-0901A366A65C_1_5">2011-12-31</dei:DocumentPeriodEndDate>
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  <dei:AmendmentFlag contextRef="eol_0000894189-12-005908_STD_1_20120501_0" id="id_415764_3E75D2AB-D530-4125-B9AD-0901A366A65C_1_4">false</dei:AmendmentFlag>
  <dei:DocumentCreationDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0" id="id_415764_3E75D2AB-D530-4125-B9AD-0901A366A65C_1_0">2012-10-24</dei:DocumentCreationDate>
  <rr:ProspectusDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0" id="id_415764_3E75D2AB-D530-4125-B9AD-0901A366A65C_1_2">2012-05-01</rr:ProspectusDate>
  <rr:PortfolioTurnoverTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_33">&lt;tt&gt;The Fund pays transaction costs, such as commissions, when it buys and sells &lt;br /&gt;securities (or "turns over" its portfolio). A higher portfolio turnover may &lt;br /&gt;indicate higher transaction costs and may result in higher taxes when Fund shares &lt;br /&gt;are held in a taxable account. These costs, which are not reflected in annual &lt;br /&gt;fund operating expenses or in the Example, affect the Fund&apos;s performance. &lt;br /&gt;During the most recent fiscal year, the Fund&apos;s portfolio turnover was 78% &lt;br /&gt;of the average value of its portfolio.&lt;/tt&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_93">&lt;div style="display:none"&gt;~ http://www.corefund.net/role/ExpenseExample_S000008815Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_91">&lt;div style="display:none"&gt;~ http://www.corefund.net/role/BarChartData_S000008815Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_3">&lt;tt&gt;The investment objective of The Core Fund is a high level of income over the long term &lt;br /&gt;consistent with the preservation of capital.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_26">&lt;tt&gt;This Example is intended to help you compare the cost of investing in the Fund &lt;br /&gt;with the cost of investing in other mutual funds.&lt;br /&gt; &lt;br /&gt;The Example assumes that you invest $10,000 in the Fund for the time periods&lt;br /&gt;indicated and then redeem all of your shares at the end of those periods. The &lt;br /&gt;Example also assumes that your investment has a 5% return each year and that the &lt;br /&gt;Fund&apos;s operating expenses remain the same.&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PerformanceTableHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_61">Performance Table</rr:PerformanceTableHeading>
  <rr:IndexNoDeductionForFeesExpensesTaxes contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_62">reflects no deductions for fees, expenses or taxes</rr:IndexNoDeductionForFeesExpensesTaxes>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_36">&lt;tt&gt;The Fund&apos;s investment adviser seeks to achieve the Fund&apos;s investment objective&lt;br /&gt;by investing primarily in U.S. Government securities. U.S. Government securities&lt;br /&gt;are those issued or guaranteed by the U.S. government, its agencies or&lt;br /&gt;instrumentalities, as well as asset-backed securities invested in U.S. &lt;br /&gt;Government guaranteed loans, money market funds investing primarily in &lt;br /&gt;U.S. Government securities and repurchase agreements that are fully &lt;br /&gt;collateralized by U.S. Government securities. Under normal circumstances, &lt;br /&gt;the Fund&apos;s portfolio will have a dollar-weighted average effective maturity &lt;br /&gt;of no more than 3 years and at least 80% of the Fund&apos;s assets (defined as &lt;br /&gt;net assets plus the amount of any borrowing for investment purposes) will &lt;br /&gt;be invested in U.S. Government securities.&lt;br /&gt; &lt;br /&gt;The adviser ordinarily allocates most of the Fund&apos;s assets among relatively&lt;br /&gt;higher-yielding sectors of the U.S. Government securities universe, including:&lt;br /&gt;(1) mortgage-backed securities, (2) asset-backed securities (including auction&lt;br /&gt;rate securities), (3) callable bonds, (4) structured notes, (5) step-up notes&lt;br /&gt;and (6) cash equivalents. Mortgage-backed and asset-backed securities represent&lt;br /&gt;an ownership interest in a pool of mortgage loans or other types of loans. These&lt;br /&gt;securities have a relatively higher yield because the borrower has the right to&lt;br /&gt;prepay its loan, which makes a security&apos;s maturity uncertain. Similarly, callable &lt;br /&gt;bonds have a relatively higher yield because the borrower has the right to prepay &lt;br /&gt;(call) the security prior to its stated final maturity. Structured notes have &lt;br /&gt;interest and/or principal payments indexed to certain interest rates or one or &lt;br /&gt;more indices. Step-up obligations have a coupon rate that "steps-up" periodically &lt;br /&gt;and typically are callable. These securities have higher yields because of the &lt;br /&gt;uncertainty of the interest payments and maturity. However, when the adviser deems &lt;br /&gt;it appropriate, the adviser will invest some or all of the Fund&apos;s assets in &lt;br /&gt;lower-yielding sectors of the U.S. Government universe that are less sensitive &lt;br /&gt;to interest rate increases.&lt;br /&gt; &lt;br /&gt;The Fund may invest the remainder of its assets in securities other than U.S.&lt;br /&gt;Government securities, including mortgage-backed securities, asset-backed&lt;br /&gt;securities, money market investments (including money market funds), commercial&lt;br /&gt;paper and taxable municipal securities (including auction rate securities). The&lt;br /&gt;Fund may also employ borrowing by using reverse repurchase agreements to make&lt;br /&gt;additional investments when the adviser believes investment returns will exceed&lt;br /&gt;borrowing costs.&lt;br /&gt; &lt;br /&gt;The adviser also seeks to achieve the capital preservation component of the&lt;br /&gt;Fund&apos;s objective by maintaining a relatively short weighted average effective&lt;br /&gt;maturity and by using a variety of derivative instruments in an attempt to &lt;br /&gt;limit (hedge) interest rate risk and reduce the volatility of the Fund&apos;s share&lt;br /&gt;price. The adviser may buy or sell options, futures contracts and options on&lt;br /&gt;futures contracts, as well as enter into swap and structured contracts for these&lt;br /&gt;purposes. Generally, the adviser uses these instruments to extend the Fund&apos;s&lt;br /&gt;duration when interest rates are expected to decline and to reduce the Fund&apos;s&lt;br /&gt;duration when interest rates are expected to rise. The Fund may also use these&lt;br /&gt;instruments to increase the Fund&apos;s income or gain.&lt;br /&gt; &lt;br /&gt;In general terms, the adviser buys securities that it believes offer attractive&lt;br /&gt;yields and are undervalued relative to other securities of similar quality and&lt;br /&gt;interest rate sensitivity. The adviser sells securities when they no longer meet&lt;br /&gt;these criteria, to adjust the asset allocation, or to manage the average effective &lt;br /&gt;maturity or duration of the Fund&apos;s portfolio. The adviser may engage in frequent &lt;br /&gt;buying and selling of portfolio securities and futures contracts in seeking to &lt;br /&gt;achieve the Fund&apos;s investment objective.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_1">FUND SUMMARY</rr:RiskReturnHeading>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_24">The operating expenses in this fee table will not correlate to the expense
ratio in the Fund&apos;s financial highlights because the financial statements
include only the direct operating expenses incurred by the Fund.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:ExpenseExampleHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_25">Example:</rr:ExpenseExampleHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_63">After-tax returns are estimated and were calculated using the historical
highest individual federal marginal income tax rates and do not reflect
the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ObjectiveHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_2">Investment Objective:</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_43">You should be aware that the Fund&apos;s past performance (before and after taxes)
may not be an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskLoseMoney contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_39">As with all mutual funds, there is the risk that you could lose money through your investment in the Fund.</rr:RiskLoseMoney>
  <rr:RiskHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_37">Principal Investment Risks:</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_6">Shareholder Fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleByYearCaption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_27">Although your actual costs may be higher or lower, based upon these assumptions your costs would be:</rr:ExpenseExampleByYearCaption>
  <rr:PortfolioTurnoverRate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_34">0.78</rr:PortfolioTurnoverRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_64">Actual after-tax returns depend on an investor&apos;s tax situation and may
differ from those shown, and after-tax returns shown are not relevant
to investors who hold shares of the Fund through tax-deferred arrangements,
such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_44">Class I shares Annual Total Return (Years ended December 31)</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_40">Performance</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableClosingTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_90">&lt;tt&gt;After-tax returns are estimated and were calculated using the historical highest&lt;br /&gt;individual federal marginal income tax rates and do not reflect the impact of&lt;br /&gt;state and local taxes. Actual after-tax returns depend on an investor&apos;s tax&lt;br /&gt;situation and may differ from those shown, and after-tax returns shown are not&lt;br /&gt;relevant to investors who hold shares of the Fund through tax-deferred arrangements, &lt;br /&gt;such as 401(k) plans or individual retirement accounts. After tax returns for &lt;br /&gt;Class Y shares are not shown and will vary.&lt;/tt&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_42">The bar chart and performance table below show the variability of the Fund&apos;s
returns, which is some indication of the risks of investing in the Fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_60">&lt;tt&gt;During the period shown in the bar chart, the highest return for a quarter was&lt;br /&gt;1.55% during the quarter ended September 30, 2007, and the lowest return for a&lt;br /&gt;quarter was (0.31)% during the quarter ended June 30, 2004.&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:ExpensesRestatedToReflectCurrent contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_23">Other Expenses (Excluding Interest Expense and Shareholder Servicing) have       been restated to reflect current management fee waiver and expense               reimbursement arrangements.                                      </rr:ExpensesRestatedToReflectCurrent>
  <rr:OperatingExpensesCaption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_11">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_66">Average Annual Total Returns (For periods ended December 31, 2011)</rr:AverageAnnualReturnCaption>
  <rr:PortfolioTurnoverHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_32">Portfolio Turnover:</rr:PortfolioTurnoverHeading>
  <rr:RiskNarrativeTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_38">&lt;tt&gt;As with all mutual funds, there is the risk that you could lose money through your&lt;br /&gt;investment in the Fund. Many factors affect the Fund&apos;s net asset value and performance.&amp;#xA0;&amp;#xA0;&lt;br /&gt; &lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Government Risk. The U.S. Government&apos;s guarantee of ultimate payment of &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;principal and timely payment of interest on certain U.S. Government securities&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;owned by the Fund does not imply that the Fund&apos;s shares are guaranteed or that &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;the price of the Fund&apos;s shares will not fluctuate. In addition, securities &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;issued or guaranteed by federal agencies or instrumentalities may or may not &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;be backed by the full faith and credit of the U.S. Government.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Interest Rate Risk. The value of the Fund&apos;s securities will decrease when &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;interest rates rise.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Market Risk. The bond market may decrease in value, and it may decreas in &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;value sharply and unpredictably.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Management Risk. The securities selected by the adviser may underperform the &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;bond market or mutual funds with similar investment objectives and strategies. &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;The adviser may not be successful in limiting the Fund&apos;s interest rate risk.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Specific Maturity Risk. The specific maturities in which the Fund invests may &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;fall in value more than other maturities. Generally, due to changes in interest&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;rates and other factors, the value of a portfolio of bonds with a longer &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;effective maturity will fluctuate more than the value of a portfolio of bonds &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;with a shorter effective maturity.&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Prepayment Risk. The value of the callable, mortgage-backed and asset-backed &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;securities held by the Fund may go down as a result of changes in prepayment &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;rates on the underlying mortgages or consumer loans. During periods of declining &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;interest rates, prepayment usually increases and the Fund may have to reinvest &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;prepayment proceeds at a lower interest rate.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Credit Risk. The issuer of a fixed income security may not be able to make &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;interest and principal payments when due. Generally, the lower the credit rating &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;of a security, the greater the risk that the issuer will default on its&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;obligation.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Derivative Risk. The Fund may invest in structured instruments, which are &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;considered derivatives. The value of derivative securities is dependent upon &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;the performance of underlying securities or indices. If the underlying securities &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;or indices do not perform as expected, the value of the derivative security &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;may decline. Generally, derivatives are more volatile and riskier in terms of &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;both liquidity and value than traditional investments.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt; &lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Futures and Options Risk. The use of options, futures contracts or &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;options on futures contracts for risk management or hedging purposes &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;may not be successful, resulting in losses to the Fund. In addition, &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;the cost of hedging may reduce the Fund&apos;s returns, and the use of&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;futures and options for investment purposes increases the Fund&apos;s &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;potential for loss.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Leverage Risk. This is the risk associated with securities or practices &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;that multiply small market movements into large changes in value. Leverage &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;is often associated with investments in derivatives, such as futures and &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;options. Reverse repurchase agreements, a form of borrowing, are subject &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;to leverage risk.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Reverse Repurchase Transaction Risk. Reverse repurchase transactions also &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;involve the risk that the market value of the securities sold by the Fund &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;may decline below the price at which the Fund is obligated to repurchase &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;the securities. In the event of bankruptcy or other default by the &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;purchaser, the Fund could experience both delays in repurchasing the &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;portfolio securities and losses. Reverse repurchase transactions may increase&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;fluctuations in the Fund&apos;s net asset value.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Liquidity Risk. Liquidity risk exists when particular investments of the Fund &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;would be difficult to purchase or sell, possibly preventing the Fund from &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;selling such illiquid securities at an advantageous time or price. If an &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;auction fails for an auction rate security, there may no secondary market for &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;the security and the Fund may be forced to hold the security until the &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;security is refinanced by the issuer or a secondary market develops.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt; &lt;br /&gt;Is the Fund Right for You?&lt;br /&gt; &lt;br /&gt;The Fund may be a suitable investment for:&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Investors seeking a fund with a high level of income over the long term &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;consistent with the preservation of capital&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Investors seeking to diversify their holdings with bonds and other fixed income&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;securities&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xB7;&amp;#xA0;&amp;#xA0;Investors willing to accept price fluctuations in their investments&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_4">Fees and Expenses of the Fund:</rr:ExpenseHeading>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_65">After tax returns for Class Y shares are not shown and will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:StrategyHeading contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_35">Principal Investment Strategies:</rr:StrategyHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_41">&lt;tt&gt;The bar chart and performance table below show the variability of the Fund&apos;s&lt;br /&gt;returns, which is some indication of the risks of investing in the Fund. The &lt;br /&gt;bar chart shows performance of the Fund&apos;s Class I shares for each full calendar &lt;br /&gt;year since the Fund&apos;s inception. The performance table compares the performance &lt;br /&gt;of the Fund&apos;s shares over time to the performance of a broad-based market index. &lt;br /&gt;You should be aware that the Fund&apos;s past performance (before and after taxes) &lt;br /&gt;may not be an indication of how the Fund will perform in the future. All&lt;br /&gt;returns are for Class I shares, except as otherwise indicated.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_5">&lt;tt&gt;This table describes the fees and expenses that you may pay if you buy and hold shares &lt;br /&gt;of the Fund.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_94">&lt;div style="display:none"&gt;~ http://www.corefund.net/role/OperatingExpensesData_S000008815Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_95">&lt;div style="display:none"&gt;~ http://www.corefund.net/role/PerformanceTableData_S000008815Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1001_92">&lt;div style="display:none"&gt;~ http://www.corefund.net/role/ShareholderFeesData_S000008815Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_82">One-Year Constant Maturity Treasury Index (reflects no deductions for fees, expenses or taxes)</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_83">0.0018</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_84">0.0143</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_86">0.0208</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_87">2002-01-09</rr:AverageAnnualReturnInceptionDate>
  <ck0001309187:AverageAnnualReturnSinceInceptionSecondary contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_88">0.0118</ck0001309187:AverageAnnualReturnSinceInceptionSecondary>
  <ck0001309187:AverageAnnualReturnInceptionDateSecondary contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_89">2007-05-01</ck0001309187:AverageAnnualReturnInceptionDateSecondary>
  <ck0001309187:AverageAnnualReturnYear05Secondary contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x-9984166" unitRef="pure" xsi:nil="true" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_2001_85" />
  <rr:AverageAnnualReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602366_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_3002_77">Class I Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602366_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_3002_78">-0.0017</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602366_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_3002_79">0.0138</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602366_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_3002_80">0.0140</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602366_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_3002_81">2002-01-09</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602395_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_4002_72">Class I Return After Taxes on Distributions</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602395_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_4002_73">-0.0076</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602395_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_4002_74">0.0125</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602395_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_4002_75">0.0132</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602440x602395_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_4002_76">2002-01-09</rr:AverageAnnualReturnInceptionDate>
  <dei:TradingSymbol contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_0">SGBYX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_7">0.00</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_67">Class Y Return Before Taxes</rr:AverageAnnualReturnLabel>
  <rr:Component1OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_14">0.0025</rr:Component1OtherExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_28">56</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_29">352</rr:ExpenseExampleYear03>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_20">-0.0081</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:ExpenseExampleYear10 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_31">1567</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_10">-0.0100</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_30">668</rr:ExpenseExampleYear05>
  <rr:Component3OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_16">0.0009</rr:Component3OtherExpensesOverAssets>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_68">0.0005</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_17">0.0034</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_12">0.0100</rr:ManagementFeesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_21">2013-04-30</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" xsi:nil="true" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_69" />
  <rr:Component2OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_15">0.0000</rr:Component2OtherExpensesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_9">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_13">0.00</rr:DistributionAndService12b1FeesOverAssets>
  <rr:NetExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_22">0.0055</rr:NetExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_19">0.0136</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_70">0.0252</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_71">2007-05-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_18">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980016" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1003_8">0.00</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_0">SGBFX</dei:TradingSymbol>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_57">lowest return</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_54">highest return</rr:HighestQuarterlyReturnLabel>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_7">0.00</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_67">Class I Return Before Taxes</rr:AverageAnnualReturnLabel>
  <rr:Component1OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_14">0.0025</rr:Component1OtherExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_28">77</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_56">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleYear03 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_29">371</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_58">-0.0031</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_46">0.0138</rr:AnnualReturn2004>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_20">-0.0061</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AnnualReturn2010 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_52">0.0108</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_31">1585</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_10">0.0000</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="iso4217_USD" decimals="0" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_30">688</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_49">0.0500</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_55">0.0155</rr:BarChartHighestQuarterlyReturn>
  <rr:Component3OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_16">0.0009</rr:Component3OtherExpensesOverAssets>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_68">-0.0026</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_17">0.0034</rr:OtherExpensesOverAssets>
  <rr:AnnualReturn2008 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_50">0.0324</rr:AnnualReturn2008>
  <rr:ManagementFeesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_12">0.0100</rr:ManagementFeesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_21">2013-04-30</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_59">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AnnualReturn2009 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_51">0.0307</rr:AnnualReturn2009>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_69">0.0241</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2005 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_47">0.0274</rr:AnnualReturn2005>
  <rr:Component2OtherExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_15">0.0000</rr:Component2OtherExpensesOverAssets>
  <rr:AnnualReturn2011 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_53">-0.0026</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_9">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AnnualReturn2003 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_45">0.0103</rr:AnnualReturn2003>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_13">0.00</rr:DistributionAndService12b1FeesOverAssets>
  <rr:NetExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_22">0.0075</rr:NetExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_19">0.0136</rr:ExpensesOverAssets>
  <rr:AnnualReturn2006 contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_48">0.0405</rr:AnnualReturn2006>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_70">0.0238</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_71">2002-01-09</rr:AverageAnnualReturnInceptionDate>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="4" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_18">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000894189-12-005908_STD_1_20120501_0_602228x-9980014_602238x-9980013_602488x-9980017" unitRef="pure" decimals="2" id="id_415764_521C13FE-6BDF-4418-B45B-61147C7BE383_1002_8">0.00</rr:MaximumDeferredSalesChargeOverOfferingPrice>
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