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  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">The Money Market Portfolio seeks to maximize current income to the extent consistent with the preservation of capital and the maintenance of liquidity by investing in high quality money market instruments authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">Ultra-Short Duration Government Portfolio</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The Ultra-Short Duration Government Portfolio seeks to achieve a high level of current income, consistent with low volatility of principal, by investing in obligations authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">Summary Section&lt;br/&gt; Money Market Portfolio</rr:RiskReturnHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">This table describes the fees and expenses that you may pay if you buy and hold TCU Shares&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt; of the Portfolio.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Money Market Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">Short Duration Portfolio</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The Short Duration Portfolio seeks to achieve a high level of current income, consistent with relatively low volatility of principal, by investing in obligations authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">This table describes the fees and expenses that you may pay if you buy and hold TCU Shares* of the Portfolio.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt;&lt;br/&gt;&lt;b&gt;(fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;b&gt;Shareholder Fees&lt;br/&gt;(fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;/b&gt;&lt;br/&gt;&lt;b&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0015</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0019</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0014</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0034</rr:ExpensesOverAssets>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;b&gt;Shareholder Fees &lt;br/&gt;(fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;br/&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0028</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.001</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0018</rr:Component2OtherExpensesOverAssets>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in TCU Shares of the Portfolio 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 operating expenses for TCU Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0048</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">35</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">109</rr:ExpenseExampleYear03>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_2" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">-0.0028</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">191</rr:ExpenseExampleYear05>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;br/&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:NetExpensesOverAssets id="Item_3" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="USD">431</rr:ExpenseExampleYear10>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0015</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.002</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0015</rr:Component2OtherExpensesOverAssets>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0035</rr:ExpensesOverAssets>
  <rr:PortfolioTurnoverHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">PORTFOLIO TURNOVER</rr:PortfolioTurnoverHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in TCU Shares of the Portfolio for the time periods indicated and then redeem all of your TCU Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses for TCU Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in TCU Shares of the Portfolio 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 operating expenses for TCU Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member" unitRef="pure">1.05</rr:PortfolioTurnoverRate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">36</rr:ExpenseExampleYear01>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">113</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">197</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">443</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">20</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">126</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">241</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="USD">577</rr:ExpenseExampleYear10>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">This table describes the fees and expenses that you may pay if you buy and hold TCU Shares* of the Portfolio.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:ExpenseNarrativeTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio&amp;#8217;s performance. During the most recent fiscal year, the Portfolio&amp;#8217;s turnover rate was 173% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;b&gt;Investments:&lt;/b&gt; The Portfolio invests exclusively in:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Securities issued or guaranteed as to principal and interest by the U.S. government or by its agencies, instrumentalities or sponsored enterprises (&amp;#8220;U.S. Government Securities&amp;#8221;) and related custodial receipts&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Federal funds&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;The Portfolio&amp;#8217;s securities are valued using the amortized cost method as permitted by Rule 2a-7 under the Investment Company Act of 1940, as amended (the &amp;#8220;1940 Act&amp;#8221;). Under Rule 2a-7, the Portfolio may invest only in U.S. dollar-denominated securities that are determined to present minimal credit risk and meet certain other criteria, including conditions relating to maturity, portfolio diversification, portfolio liquidity and credit quality. The Portfolio seeks to maintain a stable net asset value (&amp;#8220;NAV&amp;#8221;) of $1.00 per share.&lt;br/&gt;&lt;br/&gt;Pursuant to an order of the Securities and Exchange Commission (&amp;#8220;SEC&amp;#8221;), the Portfolio may enter into principal transactions in certain taxable money market instruments, including repurchase agreements, with Goldman, Sachs &amp;amp; Co. (&amp;#8220;Goldman Sachs&amp;#8221;), an affiliate of the Portfolio&amp;#8217;s investment adviser.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">As with any mutual fund, it is possible to lose money on an investment in the Portfolio.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;The risk that an issuer or guarantor of a security, or a bank (or a foreign branch of a U.S. bank) or other financial institution that has entered into a repurchase agreement with the Portfolio, may default on its obligations to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that during periods of rising interest rates, the Portfolio&amp;#8217;s yield (and the market value of its fixed-income securities) will tend to be lower than prevailing market rates. A low interest rate environment poses additional risks to the Portfolio, because low yields on the Portfolio&amp;#8217;s holdings may have an adverse impact on the Portfolio&amp;#8217;s ability to provide a positive yield to its shareholders, pay expenses out of Portfolio assets, or, at times, maintain a stable $1.00 share price.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may become less liquid in response to market developments or adverse investor perception. Illiquid investments may be more difficult to value. While the Portfolio endeavors to maintain a high level of liquidity, the liquidity of portfolio securities can deteriorate rapidly due to credit events affecting issuers or guarantors or due to general market conditions and a lack of willing buyers. When there is no willing buyer and investments cannot be readily sold at the desired time or price, the Portfolio may have to accept a lower price or may not be able to sell the instrument at all. An inability to sell one or more portfolio positions can adversely affect the Portfolio&amp;#8217;s ability to maintain a $1.00 share price or prevent the Portfolio from being able to take advantage of other investment opportunities.&lt;br/&gt;&lt;br/&gt;Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the time period stated in the Prospectus because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. Certain shareholders may own or control a significant percentage of the Portfolio&amp;#8217;s shares, and redemptions by these shareholders of their Portfolio shares may further increase the Portfolio&amp;#8217;s liquidity risk and may adversely impact the Portfolio&amp;#8217;s NAV.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Regulatory Risk&lt;/b&gt;&amp;#8212;The SEC has recently adopted amendments to money market fund regulations, imposing new liquidity, credit quality, and maturity requirements on all money market funds, and may adopt additional amendments in the future. These changes may adversely affect the Portfolio&amp;#8217;s return potential.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Stable NAV Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio will not be able to maintain a NAV per share of $1.00 at all times. Shareholders of the Portfolio should not rely on or expect the investment adviser or an affiliate to purchase distressed assets from the Portfolio, make capital infusions into the Portfolio, enter into capital support agreements with the Portfolio or take other actions to help the Portfolio maintain a stable $1.00 share price.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&lt;/b&gt;&amp;#8212;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, the National Credit Union Administration (&amp;#8220;NCUA&amp;#8221;), the Federal Deposit Insurance Corporation or any other governmental agency. Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;b&gt;Investments:&lt;/b&gt; The Portfolio invests exclusively in:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;U.S. Government Securities and related custodial receipts &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above  &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Short-term obligations that are permitted investments for the Money Market Portfolio, such as U.S. Government Securities and related custodial receipts, and U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;Under normal circumstances, at least 80% of the net assets (measured at the time of purchase) of the Portfolio will be invested in U.S. Government Securities, including mortgage-related securities representing an interest in or collateralized by other mortgage-related securities and/or in repurchase agreements collateralized by U.S. Government Securities. The Portfolio expects that a substantial portion of its assets will be invested in mortgage-related securities. While there will be fluctuations in the NAV of the Portfolio, the Portfolio is expected to have less interest rate risk and asset value fluctuation than funds investing primarily in longer-term mortgage-backed securities paying a fixed rate of interest.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Portfolio Duration (under normal interest rate conditions):&lt;/b&gt;&lt;br/&gt;The Portfolio&amp;#8217;s target duration is that of the BofA Merrill Lynch Six-Month U.S. Treasury Bill Index to the BofA Merrill Lynch One-Year U.S. Treasury Note Index and its maximum duration is that of a Two-Year U.S. Treasury Security (the Portfolio&amp;#8217;s duration approximates its price sensitivity to changes in interest rates). Over the past ten years, the duration of the BofA Merrill Lynch Six-Month U.S. Treasury Bill Index, the BofA Merrill Lynch One-Year U.S. Treasury Note Index and a Two-Year U.S. Treasury Security have been approximately 0.48, 0.98, and 1.92 respectively.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Expected Approximate Interest Rate Sensitivity:&lt;/b&gt; Nine-Month Treasury Bill&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Credit Quality:&lt;/b&gt; U.S. Government Securities &lt;br/&gt;&lt;br/&gt;&lt;b&gt;Benchmarks:&lt;/b&gt; BofA Merrill Lynch Six-Month U.S. Treasury Bill Index and BofA Merrill Lynch One-Year U.S. Treasury Note Index&lt;br/&gt;&lt;br/&gt;Investment Adviser&amp;#8217;s Investment Philosophy:&lt;br/&gt;Global fixed income markets are constantly evolving and are highly diverse&amp;#8212;with myriad sectors, issuers and securities. The Investment Adviser believes that inefficiencies in these complex markets cause bond prices to diverge from their fair value. To capitalize on these inefficiencies and generate consistent risk-adjusted performance, the Investment Adviser believes it is critical to:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Take a global perspective to uncover relative value opportunities  &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool  &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Build a strong team of skilled investors who excel on behalf of our clients&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskMoneyMarketFund>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, the National Credit Union Administration (&amp;#8220;NCUA&amp;#8221;), the Federal Deposit Insurance Corporation or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">December 31, 2013</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">During normal market conditions, the Portfolio intends to invest a substantial portion of its assets in mortgage-related securities, which include privately-issued mortgage-related securities rated, at the time of purchase, in one of the two highest rating categories by a Nationally Recognized Statistical Rating Organization (&amp;#8220;NRSRO&amp;#8221;) and mortgage-related securities that are U.S. Government Securities. Mortgage-related securities held by the Portfolio may include both adjustable rate and fixed rate mortgage pass-through securities, collateralized mortgage obligations and other multiclass mortgage-related securities, as well as other securities that are collateralized by or represent direct or indirect interests in mortgage-related securities or mortgage loans.&lt;br/&gt;&lt;br/&gt;The Portfolio may also invest in:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Other U.S. Government Securities and related custodial receipts &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Short-term obligations that are permitted investments for the Money Market Portfolio, such as U.S. Government Securities and related custodial receipts, and U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;The Portfolio will attempt, through the purchase of securities with short or negative durations, to limit the effect of interest rate fluctuations on the Portfolio&amp;#8217;s NAV.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Portfolio Duration (under normal interest rate conditions):&lt;/b&gt;&lt;br/&gt;The Portfolio&amp;#8217;s target duration is equal to that of the BofA Merrill Lynch Two-Year U.S. Treasury Note Index and its maximum duration is that of a Three-Year U.S. Treasury Security (the Portfolio&amp;#8217;s duration approximates its price sensitivity to changes in interest rates). Over the past ten years, the duration of the BofA Merrill Lynch Two-Year U.S. Treasury Note Index and a Three-Year U.S. Treasury Security have been approximately 1.92 and 2.78, respectively.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Expected Approximate Interest Rate Sensitivity:&lt;/b&gt; Two-Year U.S. Treasury Note&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Credit Quality:&lt;/b&gt; Privately issued mortgage securities rated AAA or Aaa or AA or Aa by a NRSRO at the time of purchase; U.S. Government Securities&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Benchmark:&lt;/b&gt; The BofA Merrill Lynch Two-Year U.S. Treasury Note Index&lt;br/&gt;&lt;br/&gt;Investment Adviser&amp;#8217;s Investment Philosophy:&lt;br/&gt;Global fixed income markets are constantly evolving and are highly diverse&amp;#8212;with myriad sectors, issuers and securities. The Investment Adviser believes that inefficiencies in these complex markets cause bond prices to diverge from their fair value. To capitalize on these inefficiencies and generate consistent risk-adjusted performance, the Investment Adviser believes it is critical to:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Take a global perspective to uncover relative value opportunities&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Build a strong team of skilled investors who excel on behalf of our clients&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt;.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0168</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0106</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0126</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0315</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0503</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0516</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0221</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0022</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0009</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0002</rr:AnnualReturn2011>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;</rr:BarChartHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Call Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower yielding securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;An issuer or guarantor of fixed income securities held by the Portfolio may default on its obligation to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration. &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Extension Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) later than expected. This may happen when there is a rise in interest rates. Under these circumstances, the value of the obligation will decrease, and the Portfolio will also suffer from the inability to invest in higher yielding securities. &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that when interest rates increase, fixed income securities held by the Portfolio will generally decline in value. Long-term fixed income securities will normally have more price volatility because of this risk than short-term fixed income securities. &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may be illiquid or that may become less liquid in response to market developments or adverse investor perceptions. Illiquid investments may be more difficult to value. Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the allowable time period because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. To meet redemption requests, the Portfolio may be forced to sell securities at an unfavorable time and/or under unfavorable conditions.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results. &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions. Price changes may be temporary or last for extended periods. The Portfolio&amp;#8217;s investments may be overweighted from time to time in one or more industry sectors or countries, which will increase the Portfolio&amp;#8217;s exposure to risk of loss from adverse developments affecting those sectors or countries.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Mortgage-Backed Securities Risk&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (i.e., in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (i.e., in periods of declining interest rates, issuers may pay principal more quickly than expected, causing the Portfolio to reinvest proceeds at lower prevailing interest rates). Mortgage-backed securities offered by non-governmental issuers are subject to other risks as well, including failures of private insurers to meet their obligations and unexpectedly high rates of default on the mortgages backing the securities. &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Portfolio Turnover Rate Risk&lt;/b&gt;&amp;#8212;A high rate of portfolio turnover (100% or more) involves correspondingly greater expenses which must be borne by the Portfolio and its shareholders.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&lt;/b&gt;&amp;#8212;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio. An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">As with any mutual fund, it is possible to lose money on an investment in the Portfolio.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt;. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. Updated performance information is available and may be obtained on the Fund&amp;#8217;s website at www.trustcu.com and/or by calling 1-800-342-5828 or 1-800-237-5678. &lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceNarrativeTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0005</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0132</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The total return for the 9-month period ended&lt;br/&gt;September 30, 2012 was 0.61%.&lt;br/&gt;&lt;br/&gt;Best Quarter&lt;br/&gt;Q4 &amp;#8216;08&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.75%&lt;br/&gt;&lt;br/&gt;Worst Quarter&lt;br/&gt; Q2 &amp;#8216;04&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;#8722;0.13%</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0002</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0152</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.0197</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member" unitRef="pure">0.041</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0401</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0161</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0164</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.03</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0474</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0553</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0421</rr:AnnualReturn2008>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberTcu_Member">1988-05-17</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0227</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0079</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0067</rr:AnnualReturn2011>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0061</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">2008-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0175</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">-0.0013</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">www.trustcu.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Call Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower yielding securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;An issuer or guarantor of fixed income securities held by the Portfolio may default on its obligation to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Extension Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) later than expected. This may happen when there is a rise in interest rates. Under these circumstances, the value of the obligation will decrease, and the Portfolio will also suffer from the inability to invest in higher yielding securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that when interest rates increase, fixed income securities held by the Portfolio will generally decline in value. Long-term fixed income securities will normally have more price volatility because of this risk than short-term fixed income securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may be illiquid or that may become less liquid in response to market developments or adverse investor perceptions. Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the allowable time period because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. To meet redemption requests, the Portfolio may be forced to sell securities at an unfavorable time and/or under unfavorable conditions.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions. Price changes may be temporary or last for extended periods. The Portfolio&amp;#8217;s investments may be overweighted from time to time in one or more industry sectors or countries, which will increase the Portfolio&amp;#8217;s exposure to risk of loss from adverse developments affecting those sectors or countries.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Mortgage-Backed Securities Risk&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (i.e., in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (i.e., in periods of declining interest rates, issuers may pay principal more quickly than expected, causing the Portfolio to reinvest proceeds at lower prevailing interest rates). Mortgage-backed securities offered by non-governmental issuers are subject to other risks as well, including failures of private insurers to meet their obligations and unexpectedly high rates of default on the mortgages backing the securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Portfolio Turnover Rate Risk&lt;/b&gt;&amp;#8212;A high rate of portfolio turnover (100% or more) involves correspondingly greater expenses which must be borne by the Portfolio and its shareholders.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&lt;/b&gt;&amp;#8212;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio. An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNarrativeTextBlock>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt;. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. Updated performance information is available and may be obtained on the Fund&amp;#8217;s website at www.trustcu.com and/or by calling 1-800-342-5828 or 1-800-237-5678.&lt;br/&gt;&lt;br/&gt; * Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceNarrativeTextBlock>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0067</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_Member" unitRef="pure">0.0027</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0057</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_Member" unitRef="pure">0.0101</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0268</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_Member" unitRef="pure">0.0206</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_Member" unitRef="pure">0.0328</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0255</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0283</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_Member" unitRef="pure">0.0229</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0249</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_Member" unitRef="pure">0.0304</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member" unitRef="pure">0.0346</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_4" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_Member" unitRef="pure">0.0375</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_5" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0409</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_6" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_Member" unitRef="pure">0.044</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;b&gt;</rr:BarChartHeading>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberTcu_Member">1991-07-10</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The total return for the 9-month period ended&lt;br/&gt;September 30, 2012 was 1.07%.&lt;br/&gt;&lt;br/&gt;Best Quarter&lt;br/&gt;Q2 &amp;#8216;02&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+2.37%&lt;br/&gt;&lt;br/&gt;Worst Quarter&lt;br/&gt;Q2 &amp;#8216;04&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;#8722;0.77%</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2002 id="Item_7" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0584</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 id="Item_8" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0284</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 id="Item_9" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.024</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 id="Item_10" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0186</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 id="Item_11" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.048</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 id="Item_12" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0547</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 id="Item_13" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0277</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 id="Item_14" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0427</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 id="Item_15" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.028</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 id="Item_16" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0144</rr:AnnualReturn2011>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">The total return for the 9-month period ended September 30, 2012&lt;br/&gt;was 0.05%.&lt;br/&gt;&lt;br/&gt;Best Quarter&lt;br/&gt;Q4 &amp;#8216;06&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.32%&lt;br/&gt;&lt;br/&gt;Worst Quarter&lt;br/&gt;Q4 &amp;#8216;11&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+0.00%</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0144</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0146</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_Member" unitRef="pure">0.0156</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0334</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_Member" unitRef="pure">0.039</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_Member" unitRef="pure">0.038</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0344</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0345</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_Member" unitRef="pure">0.0338</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0424</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_Member" unitRef="pure">0.0448</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_17" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_Member" unitRef="pure">0.0466</rr:AverageAnnualReturnSinceInception>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesUltra-ShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesUltra-ShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedUltra-ShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedUltra-ShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt;.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The Money Market Portfolio seeks to maximize current income to the extent consistent with the preservation of capital and the maintenance of liquidity by investing in high quality money market instruments authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">This table describes the fees and expenses that you may pay if you buy and hold Investor Shares of the Portfolio.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt;&lt;br/&gt;&lt;b&gt;(fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">Summary Section&lt;br/&gt;Money Market Portfolio</rr:RiskReturnHeading>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;/b&gt;&lt;br/&gt; &lt;b&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.0028</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.001</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.0018</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.0048</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_18" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">-0.0028</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets id="Item_19" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">December 31, 2013</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in Investor Shares of the Portfolio for the time periods indicated and then redeem all of your Investor Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses for Investor Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;b&gt;Investments:&lt;/b&gt; &amp;nbsp;The Portfolio invests exclusively in:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Securities issued or guaranteed as to principal and interest by the U.S. government or by its agencies, instrumentalities or sponsored enterprises (&amp;#8220;U.S. Government Securities&amp;#8221;) and related custodial receipts &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Federal funds &lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;The Portfolio&amp;#8217;s securities are valued using the amortized cost method as permitted by Rule 2a-7 under the Investment Company Act of 1940, as amended (the &amp;#8220;1940 Act&amp;#8221;). Under Rule 2a-7, the Portfolio may invest only in U.S. dollar-denominated securities that are determined to present minimal credit risk and meet certain other criteria, including conditions relating to maturity, portfolio diversification, portfolio liquidity and credit quality. The Portfolio seeks to maintain a stable net asset value (&amp;#8220;NAV&amp;#8221;) of $1.00 per share. &lt;br/&gt;&lt;br/&gt;Pursuant to an order of the Securities and Exchange Commission (&amp;#8220;SEC&amp;#8221;), the Portfolio may enter into principal transactions in certain taxable money market instruments, including repurchase agreements, with Goldman, Sachs &amp;amp; Co. (&amp;#8220;Goldman Sachs&amp;#8221;), an affiliate of the Portfolio&amp;#8217;s investment adviser.</rr:StrategyNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;The risk that an issuer or guarantor of a security, or a bank (or a foreign branch of a U.S. bank) or other financial institution that has entered into a repurchase agreement with the Portfolio, may default on its obligations to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that during periods of rising interest rates, the Portfolio&amp;#8217;s yield (and the market value of its fixed-income securities) will tend to be lower than prevailing market rates. A low interest rate environment poses additional risks to the Portfolio, because low yields on the Portfolio&amp;#8217;s holdings may have an adverse impact on the Portfolio&amp;#8217;s ability to provide a positive yield to its shareholders, pay expenses out of Portfolio assets, or, at times, maintain a stable $1.00 share price.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may become less liquid in response to market developments or adverse investor perception. Illiquid investments may be more difficult to value. While the Portfolio endeavors to maintain a high level of liquidity, the liquidity of portfolio securities can deteriorate rapidly due to credit events affecting issuers or guarantors or due to general market conditions and a lack of willing buyers. When there is no willing buyer and investments cannot be readily sold at the desired time or price, the Portfolio may have to accept a lower price or may not be able to sell the instrument at all. An inability to sell one or more portfolio positions can adversely affect the Portfolio&amp;#8217;s ability to maintain a $1.00 share price or prevent the Portfolio from being able to take advantage of other investment opportunities.&lt;br/&gt;&lt;br/&gt;Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the time period stated in the Prospectus because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. Certain shareholders may own or control a significant percentage of the Portfolio&amp;#8217;s shares, and redemptions by these shareholders of their Portfolio shares may further increase the Portfolio&amp;#8217;s liquidity risk and may adversely impact the Portfolio&amp;#8217;s NAV.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Regulatory Risk&lt;/b&gt;&amp;#8212;The SEC has recently adopted amendments to money market fund regulations, imposing new liquidity, credit quality, and maturity requirements on all money market funds, and may adopt additional amendments in the future. These changes may adversely affect the Portfolio&amp;#8217;s return potential.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Stable NAV Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio will not be able to maintain a NAV per share of $1.00 at all times. Shareholders of the Portfolio should not rely on or expect the investment adviser or an affiliate to purchase distressed assets from the Portfolio, make capital infusions into the Portfolio, enter into capital support agreements with the Portfolio or take other actions to help the Portfolio maintain a stable $1.00 share price.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&amp;#8212;&lt;/b&gt;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, the National Credit Union Administration (&amp;#8220;NCUA&amp;#8221;), the Federal Deposit Insurance Corporation or any other governmental agency. Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, the National Credit Union Administration (&amp;#8220;NCUA&amp;#8221;), the Federal Deposit Insurance Corporation or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">Short Duration Portfolio</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The Short Duration Portfolio seeks to achieve a high level of current income, consistent with relatively low volatility of principal, by investing in obligations authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">This table describes the fees and expenses that you may pay if you buy and hold Investor Shares of the Portfolio.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;b&gt;Shareholder Fees&lt;br/&gt;(fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;br/&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in Investor Shares of the Portfolio 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 operating expenses for Investor Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">PORTFOLIO TURNOVER</rr:PortfolioTurnoverHeading>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. You may obtain the Portfolio&amp;#8217;s current yield by calling 1-800-342-5828 or 1-800-237-5678.&lt;br/&gt;&lt;br/&gt;As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year. The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio&amp;#8217;s performance. During the most recent fiscal year, the Portfolio&amp;#8217;s turnover rate was 173% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">As with any mutual fund, it is possible to lose money on an investment in the Portfolio.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;b&gt;TOTAL RETURN&lt;/b&gt; &lt;b&gt;CALENDAR YEAR&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The total return for the 9-month period ended September 30, 2012 was&lt;br/&gt; 0.05%.&lt;br/&gt;&lt;br/&gt;Best Quarter&lt;br/&gt;Q4 &amp;#8216;06&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.32%&lt;br/&gt;&lt;br/&gt;Worst Quarter&lt;br/&gt;Q4 &amp;#8216;11&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+0.00%</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0005</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.0015</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.0003</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.002</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.0015</rr:Component2OtherExpensesOverAssets>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0.0038</rr:ExpensesOverAssets>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0132</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0144</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0146</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0156</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0334</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.039</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.038</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0344</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0345</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0338</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0424</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0448</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_20" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0466</rr:AverageAnnualReturnSinceInception>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member" unitRef="pure">1.73</rr:PortfolioTurnoverRate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">1992-10-09</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_MemberInvestorShares_Member">1992-11-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2002 id="Item_21" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0584</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 id="Item_22" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0284</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 id="Item_23" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.024</rr:AnnualReturn2004>
  <rr:AnnualReturn2006 id="Item_24" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.048</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 id="Item_25" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0547</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 id="Item_26" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0277</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 id="Item_27" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0427</rr:AnnualReturn2009>
  <rr:RiskReturnHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">Ultra-Short Duration Government Portfolio</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;b&gt;Shareholder Fees&lt;br/&gt; (fees paid directly from your investment):&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">During normal market conditions, the Portfolio intends to invest a substantial portion of its assets in mortgage-related securities, which include privately-issued mortgage-related securities rated, at the time of purchase, in one of the two highest rating categories by a Nationally Recognized Statistical Rating Organization (&amp;#8220;NRSRO&amp;#8221;) and mortgage-related securities that are U.S. Government Securities. Mortgage-related securities held by the Portfolio may include both adjustable rate and fixed rate mortgage pass-through securities, collateralized mortgage obligations and other multiclass mortgage-related securities, as well as other securities that are collateralized by or represent direct or indirect interests in mortgage-related securities or mortgage loans. &lt;br /&gt;&lt;br /&gt; The Portfolio may also invest in: &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Other U.S. Government Securities and related custodial receipts&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above&lt;/p&gt;&lt;/li&gt;   &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Short-term obligations that are permitted investments for the Money Market Portfolio, such as U.S. Government Securities and related custodial receipts, and U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;    The Portfolio will attempt, through the purchase of securities with short or negative durations, to limit the effect of interest rate fluctuations on the Portfolio&amp;#8217;s NAV.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Portfolio Duration (under normal interest rate conditions):&lt;/b&gt;&lt;br /&gt; The Portfolio&amp;#8217;s target duration is equal to that of the BofA Merrill Lynch Two-Year U.S. Treasury Note Index and its maximum duration is that of a Three-Year U.S. Treasury Security (the Portfolio&amp;#8217;s duration approximates its price sensitivity to changes in interest rates). Over the past ten years, the duration of the BofA Merrill Lynch Two-Year U.S. Treasury Note Index and a Three-Year U.S. Treasury Security have been approximately 1.92 and 2.78, respectively. &lt;br /&gt;&lt;br /&gt;&lt;b&gt;Expected Approximate Interest Rate Sensitivity: &lt;/b&gt;Two-Year U.S. Treasury Note&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Credit Quality:&lt;/b&gt;&amp;nbsp;&amp;nbsp;Privately issued mortgage securities rated AAA or Aaa or AA or Aa by a NRSRO at the time of purchase; U.S. Government Securities&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Benchmark:&lt;/b&gt;&amp;nbsp;&amp;nbsp;The BofA Merrill Lynch Two-Year U.S. Treasury Note Index &lt;br /&gt;&lt;br /&gt; Investment Adviser&amp;#8217;s Investment Philosophy: &lt;br /&gt;Global fixed income markets are constantly evolving and are highly diverse&amp;#8212;with myriad sectors, issuers and securities. The Investment Adviser believes that inefficiencies in these complex markets cause bond prices to diverge from their fair value. To capitalize on these inefficiencies and generate consistent risk-adjusted performance, the Investment Adviser believes it is critical to: &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Take a global perspective to uncover relative value opportunities&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Build a strong team of skilled investors who excel on behalf of our clients&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;b&gt;Annual Portfolio Operating Expenses&lt;br/&gt; (expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">EXAMPLE</rr:ExpenseExampleHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">PORTFOLIO TURNOVER</rr:PortfolioTurnoverHeading>
  <rr:StrategyHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt; &lt;b&gt;For the period ended December 31, 2011&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The Ultra-Short Duration Government Portfolio seeks to achieve a high level of current income, consistent with low volatility of principal, by investing in obligations authorized under the Federal Credit Union Act.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">This table describes the fees and expenses that you may pay if you buy and hold Investor Shares of the Portfolio.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in Investor Shares of the Portfolio 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 operating expenses for Investor Shares of the Portfolio remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio&amp;#8217;s performance. During the most recent fiscal year, the Portfolio&amp;#8217;s turnover rate was 105% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;b&gt;Investments:&lt;/b&gt;&amp;nbsp;&amp;nbsp;The Portfolio invests exclusively in:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;U.S. Government Securities and related custodial receipts &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Repurchase agreements related to the securities described above &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Short-term obligations that are permitted investments for the Money Market Portfolio, such as U.S. Government Securities and related custodial receipts, and U.S. dollar-denominated obligations issued or guaranteed by U.S. banks with total assets exceeding $1 billion (including obligations issued by foreign branches of such banks), but only to the extent permitted under the Federal Credit Union Act and the rules and regulations thereunder&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;Under normal circumstances, at least 80% of the net assets (measured at the time of purchase) of the Portfolio will be invested in U.S. Government Securities, including mortgage-related securities representing an interest in or collateralized by other mortgage-related securities and/or in repurchase agreements collateralized by U.S. Government Securities. The Portfolio expects that a substantial portion of its assets will be invested in mortgage-related securities. While there will be fluctuations in the NAV of the Portfolio, the Portfolio is expected to have less interest rate risk and asset value fluctuation than funds investing primarily in longer-term mortgage-backed securities paying a fixed rate of interest.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Portfolio Duration (under normal interest rate conditions): &lt;/b&gt;&lt;br/&gt;The Portfolio&amp;#8217;s target duration is that of the BofA Merrill Lynch Six-Month U.S. Treasury Bill Index to the BofA Merrill Lynch One-Year U.S. Treasury Note Index and its maximum duration is that of a Two-Year U.S. Treasury Security (the Portfolio&amp;#8217;s duration approximates its price sensitivity to changes in interest rates). Over the past ten years, the duration of the BofA Merrill Lynch Six-Month U.S. Treasury Bill Index, the BofA Merrill Lynch One-Year U.S. Treasury Note Index and a Two-Year U.S. Treasury Security have been approximately 0.48, 0.98, and 1.92 respectively. &lt;br/&gt;&lt;br/&gt;&lt;b&gt;Expected Approximate Interest Rate Sensitivity:&lt;/b&gt;&amp;nbsp;&amp;nbsp;Nine-Month Treasury Bill&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Credit Quality:&lt;/b&gt;&amp;nbsp;&amp;nbsp;U.S. Government Securities&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Benchmarks:&lt;/b&gt;&amp;nbsp;&amp;nbsp;BofA Merrill Lynch Six-Month U.S. Treasury Bill Index and BofA Merrill Lynch One-Year U.S. Treasury Note Index&lt;br/&gt;&lt;br/&gt;Investment Adviser&amp;#8217;s Investment Philosophy:&lt;br/&gt;Global fixed income markets are constantly evolving and are highly diverse&amp;#8212;with myriad sectors, issuers and securities. The Investment Adviser believes that inefficiencies in these complex markets cause bond prices to diverge from their fair value. To capitalize on these inefficiencies and generate consistent risk-adjusted performance, the Investment Adviser believes it is critical to:&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies &lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Take a global perspective to uncover relative value opportunities&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;Build a strong team of skilled investors who excel on behalf of our clients&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Call Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower yielding securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;An issuer or guarantor of fixed income securities held by the Portfolio may default on its obligation to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Extension Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) later than expected. This may happen when there is a rise in interest rates. Under these circumstances, the value of the obligation will decrease, and the Portfolio will also suffer from the inability to invest in higher yielding securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that when interest rates increase, fixed income securities held by the Portfolio will generally decline in value. Long-term fixed income securities will normally have more price volatility because of this risk than short-term fixed income securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may be illiquid or that may become less liquid in response to market developments or adverse investor perceptions. Illiquid investments may be more difficult to value. Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the allowable time period because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. To meet redemption requests, the Portfolio may be forced to sell securities at an unfavorable time and/or under unfavorable conditions.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions. Price changes may be temporary or last for extended periods. The Portfolio&amp;#8217;s investments may be overweighted from time to time in one or more industry sectors or countries, which will increase the Portfolio&amp;#8217;s exposure to risk of loss from adverse developments affecting those sectors or countries.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Mortgage-Backed Securities Risk&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (i.e., in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (i.e., in periods of declining interest rates, issuers may pay principal more quickly than expected, causing the Portfolio to reinvest proceeds at lower prevailing interest rates). Mortgage-backed securities offered by non-governmental issuers are subject to other risks as well, including failures of private insurers to meet their obligations and unexpectedly high rates of default on the mortgages backing the securities.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Portfolio Turnover Rate Risk&lt;/b&gt;&amp;#8212;A high rate of portfolio turnover (100% or more) involves correspondingly greater expenses which must be borne by the Portfolio and its shareholders.&lt;/p&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&lt;/b&gt;&amp;#8212;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio. An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. Updated performance information is available and may be obtained on the Fund&amp;#8217;s website at www.trustcu.com and/or by calling 1-800-342-5828 or 1-800-237-5678.&lt;br/&gt;&lt;br/&gt; As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year. The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same  because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The total return for the 9-month period ended September 30, 2012&lt;br/&gt; was 0.61%.&lt;br/&gt;&lt;br/&gt;Best Quarter&lt;br/&gt;Q4 &amp;#8216;08&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.75%&lt;br/&gt;&lt;br/&gt;Worst Quarter&lt;br/&gt;Q2 &amp;#8216;04&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;#8211;0.13%</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0401</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0161</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0164</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.03</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0474</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0553</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0421</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0227</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0079</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0067</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:RiskNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Call Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower yielding securities.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Credit/Default Risk&lt;/b&gt;&amp;#8212;An issuer or guarantor of fixed income securities held by the Portfolio may default on its obligation to pay interest and repay principal. Additionally, the credit quality of securities may deteriorate rapidly, which may impair the Portfolio&amp;#8217;s liquidity and cause significant NAV deterioration.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Extension Risk&lt;/b&gt;&amp;#8212;The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) later than expected. This may happen when there is a rise in interest rates. Under these circumstances, the value of the obligation will decrease, and the Portfolio will also suffer from the inability to invest in higher yielding securities.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Interest Rate Risk&lt;/b&gt;&amp;#8212;The risk that when interest rates increase, fixed income securities held by the Portfolio will generally decline in value. Long-term fixed income securities will normally have more price volatility because of this risk than short-term fixed income securities.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Liquidity Risk&lt;/b&gt;&amp;#8212;The risk that the Portfolio may make investments that may be illiquid or that may become less liquid in response to market developments or adverse investor perceptions. Liquidity risk may also refer to the risk that the Portfolio will not be able to pay redemption proceeds within the allowable time period because of unusual market conditions, an unusually high volume of redemption requests, or other reasons. To meet redemption requests, the Portfolio may be forced to sell securities at an unfavorable time and/or under unfavorable conditions.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Management Risk&lt;/b&gt;&amp;#8212;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Market Risk&lt;/b&gt;&amp;#8212;The risk that the value of the securities in which the Portfolio invests may go up or down in response to the prospects of individual companies, particular industry sectors or governments and/or general economic conditions. Price changes may be temporary or last for extended periods. The Portfolio&amp;#8217;s investments may be overweighted from time to time in one or more industry sectors or countries, which will increase the Portfolio&amp;#8217;s exposure to risk of loss from adverse developments affecting those sectors or countries.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Mortgage-Backed Securities Risk&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (i.e., in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (i.e., in periods of declining interest rates, issuers may pay principal more quickly than expected, causing the Portfolio to reinvest proceeds at lower prevailing interest rates). Mortgage-backed securities offered by non-governmental issuers are subject to other risks as well, including failures of private insurers to meet their obligations and unexpectedly high rates of default on the mortgages backing the securities.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;Portfolio Turnover Rate Risk&lt;/b&gt;&amp;#8212;A high rate of portfolio turnover (100% or more) involves correspondingly greater expenses which must be borne by the Portfolio and its shareholders.&lt;/p&gt;&lt;/li&gt; &lt;li style="margin-left:-20px"&gt;&lt;p style="PADDING-LEFT: 32px"&gt;&lt;b&gt;U.S. Government Securities Risk&lt;/b&gt;&amp;#8212;The U.S. government may not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. Although many types of U.S. government securities may be purchased by the Portfolio, such as those issued by the Federal National Mortgage Association (&amp;#8220;Fannie Mae&amp;#8221;), Federal Home Loan Mortgage Corporation (&amp;#8220;Freddie Mac&amp;#8221;) and Federal Home Loan Banks chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the United States Treasury and, therefore, are not backed by the full faith and credit of the United States. The maximum potential liability of the issuers of some U.S. government securities held by a Portfolio may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future. Fannie Mae and Freddie Mac have been operating under conservatorship, with the Federal Housing Finance Administration (&amp;#8220;FHFA&amp;#8221;) acting as their conservator, since September 2008. The entities are dependent upon the continued support of the U.S. Department of the Treasury and FHFA in order to continue their business operations. These factors, among others, could affect the future status and role of Fannie Mae and Freddie Mac and the value of their securities and the securities which they guarantee. Additionally, the U.S. government and its agencies and instrumentalities do not guarantee the market values of their securities, which may fluctuate.&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio. An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. Updated performance information is available and may be obtained on the Fund&amp;#8217;s website at www.trustcu.com and/or by calling 1-800-342-5828 or 1-800-237-5678.&lt;br/&gt;&lt;br/&gt;As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year. The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">www.trustcu.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartClosingTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The total return for the 9-month period ended September 30, 2012&lt;br/&gt;was 1.07%.&lt;br/&gt;&lt;br/&gt; Best Quarter&lt;br/&gt; Q2 &amp;#8216;02&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+2.37%&lt;br/&gt;&lt;br/&gt; Worst Quarter&lt;br/&gt; Q2 &amp;#8216;04 &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;#8211;0.77%</rr:BarChartClosingTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0107</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">2002-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0237</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">-0.0077</rr:BarChartLowestQuarterlyReturn>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0015</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0003</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0019</rr:OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0014</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="pure">0.0037</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">38</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">119</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">208</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000116693_MemberInvestorShares_Member" unitRef="USD">468</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0067</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_MemberInvestorShares_Member" unitRef="pure">0.0027</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0057</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0101</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0268</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_MemberInvestorShares_Member" unitRef="pure">0.0206</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0255</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0328</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0283</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_MemberInvestorShares_Member" unitRef="pure">0.0229</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0249</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.0304</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0346</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_28" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_MemberInvestorShares_Member" unitRef="pure">0.0375</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_29" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_MemberInvestorShares_Member" unitRef="pure">0.0409</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_30" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_MemberInvestorShares_Member" unitRef="pure">0.044</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">1991-07-10</rr:AverageAnnualReturnInceptionDate>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member" unitRef="pure">1.05</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">As with any mutual fund, it is possible to lose money on an investment in the Portfolio.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">An investment in the Portfolio is not a deposit of any credit union and is not insured or guaranteed by the National Credit Union Share Insurance Fund, NCUA or any other governmental agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the Portfolio&amp;#8217;s performance from year to year for the last ten calendar years; and (b) the Portfolio&amp;#8217;s average annual total returns for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">www.trustcu.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskLoseMoney>
  <rr:PerformanceOneYearOrLess contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year.</rr:PerformanceOneYearOrLess>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0168</rr:AnnualReturn2002>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0106</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0126</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0315</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0503</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0516</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0221</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0022</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0009</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0002</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0002</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0152</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.0197</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member" unitRef="pure">0.041</rr:AverageAnnualReturnSinceInception>
  <rr:PerformanceOneYearOrLess contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year.</rr:PerformanceOneYearOrLess>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same  because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsUltra-ShortDurationGovernmentPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:AnnualReturn2005 id="Item_31" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0186</rr:AnnualReturn2005>
  <rr:AnnualReturn2011 id="Item_32" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.0144</rr:AnnualReturn2011>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0061</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">2008-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">0.0175</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberC000027607_MemberInvestorShares_Member" unitRef="pure">-0.0013</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2010 id="Item_33" decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberInvestorShares_Member" unitRef="pure">0.028</rr:AnnualReturn2010>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000027605_MemberInvestorShares_Member">1988-05-17</rr:AverageAnnualReturnInceptionDate>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio&amp;#8217;s performance. During the most recent fiscal year, the Portfolio&amp;#8217;s turnover rate was 105% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods&lt;sup style="FONT-SIZE: 85%; VERTICAL-ALIGN: top"&gt;*&lt;/sup&gt;. The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. You may obtain the Portfolio&amp;#8217;s current yield by calling 1-800-342-5828 or 1-800-237-5678.&lt;br/&gt;&lt;br/&gt;* Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceNarrativeTextBlock>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0107</rr:BarChartYearToDateReturn>
  <rr:YearToDateReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">The total return for the 9-month period ended</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">2002-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0.0237</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">-0.0077</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsMoneyMarketPortfolioInvestorSharesBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesUltra-ShortDurationGovernmentPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesUltra-ShortDurationGovernmentPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedUltra-ShortDurationGovernmentPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsUltra-ShortDurationGovernmentPortfolioInvestorSharesBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedUltra-ShortDurationGovernmentPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseHeading contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">PORTFOLIO FEES AND EXPENSES</rr:ExpenseHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesMoneyMarketPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedMoneyMarketPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member">1992-10-09</rr:AverageAnnualReturnInceptionDate>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">www.trustcu.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The bar chart and table below provide an indication of the risks of investing in the Portfolio by showing: (a) changes in the performance of TCU Shares of the Portfolio from year to year for the last ten calendar years; and (b) the average annual total returns of TCU Shares of the Portfolio for the 1-year, 5-year, 10-year and since inception periods and how such returns compare to those of broad-based securities market indices*.&lt;br/&gt;&lt;br/&gt; * Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesMoneyMarketPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsShortDurationPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_Member">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">20</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">126</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">241</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="USD">577</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">PORTFOLIO TURNOVER</rr:PortfolioTurnoverHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedMoneyMarketPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_MemberInvestorShares_Member">1991-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_MemberInvestorShares_Member">1991-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_MemberInvestorShares_Member">1992-11-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchSixMonthUSTreasuryBillIndex_Member">1991-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBofaMerrillLynchOneYearUSTreasuryNoteIndex_Member">1991-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009983_MemberTcu_MemberBarclaysCapitalMutualFundShortOneTwoYearGovernmentIndex_Member">1992-11-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesShortDurationPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedShortDurationPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsShortDurationPortfolioInvestorSharesBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedShortDurationPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBarclaysCapitalMutualFundShortOneThreeYearGovernmentIndex_Member">1992-11-01</rr:AverageAnnualReturnInceptionDate>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member" unitRef="pure">1.73</rr:PortfolioTurnoverRate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">39</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">122</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">213</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">480</rr:ExpenseExampleYear10>
  <rr:RiskLoseMoney contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio.</rr:RiskLoseMoney>
  <rr:PerformanceOneYearOrLess contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">As of the date of this Prospectus, Investor Shares of the Portfolio had been offered to investors for less than one calendar year.</rr:PerformanceOneYearOrLess>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberInvestorShares_Member">The returns below represent the returns for TCU Shares of the Portfolio which are offered in a separate prospectus. TCU Shares and Investor Shares of the Portfolio should have returns that are substantially the same because they represent investments in the same portfolio securities and differ only to the extent that they have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsMoneyMarketPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_Member">1992-10-09</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberBofaMerrillLynchTwoYearUSTreasuryNoteIndex_MemberInvestorShares_Member">1992-10-09</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberC000116692_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000027609_MemberTcu_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">0</rr:RedemptionFee>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberC000116694_MemberInvestorShares_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009982_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberTcu_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_29Dec2011_28Dec2012S000009984_MemberInvestorShares_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesShortDurationPortfolioInvestorShares column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <link:footnoteLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
    <link:loc xlink:type="locator" xlink:href="#Item_4" xlink:label="AverageAnnualReturnSinceInception" />
    <link:footnote xlink:type="resource" xlink:label="footnote_AverageAnnualReturnSinceInception" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AverageAnnualReturnSinceInception">Since August 1, 1991.</link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="AverageAnnualReturnSinceInception" xlink:to="footnote_AverageAnnualReturnSinceInception" />
    <link:loc xlink:type="locator" xlink:href="#Item_5" xlink:label="Item_5_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_5_lbl" xlink:to="footnote_AverageAnnualReturnSinceInception" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_6" xlink:label="AverageAnnualReturnSinceInception_2" />
    <link:footnote xlink:type="resource" xlink:label="footnote_AverageAnnualReturnSinceInception_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AverageAnnualReturnSinceInception_2">Since November 1, 1992.</link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="AverageAnnualReturnSinceInception_2" xlink:to="footnote_AverageAnnualReturnSinceInception_2" />
    <link:loc xlink:type="locator" xlink:href="#Item_20" xlink:label="Item_20_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_20_lbl" xlink:to="footnote_AverageAnnualReturnSinceInception_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_30" xlink:label="Item_30_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_30_lbl" xlink:to="footnote_AverageAnnualReturnSinceInception_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_7" xlink:label="AnnualReturn2002" />
    <link:footnote xlink:type="resource" xlink:label="footnote_AnnualReturn2002" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AnnualReturn2002">During the fiscal year ended August 31, 2004, one of the principal investment strategies of the Portfolio was revised to provide that the Portfolio intends to invest a substantial portion (formerly 80%) of its net assets in mortgage-related securities.</link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="AnnualReturn2002" xlink:to="footnote_AnnualReturn2002" />
    <link:loc xlink:type="locator" xlink:href="#Item_8" xlink:label="Item_8_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_8_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_9" xlink:label="Item_9_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_9_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_10" xlink:label="Item_10_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_10_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_11" xlink:label="Item_11_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_11_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
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    <link:loc xlink:type="locator" xlink:href="#Item_15" xlink:label="Item_15_lbl" />
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    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_32_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_33" xlink:label="Item_33_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_33_lbl" xlink:to="footnote_AnnualReturn2002" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_2" xlink:label="FeeWaiverOrReimbursementOverAssets" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets">The Administrator has agreed to reduce or limit "Total Annual Portfolio Operating Expenses" of TCU Shares of the Portfolio (excluding interest, taxes, brokerage and extraordinary expenses) such that the "Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement" for TCU Shares of the Portfolio is not more than 0.20% of the average daily net assets attributable to TCU Shares of the Portfolio. This expense reduction/limitation will remain in effect through at least December 31, 2013 and, prior to such date, the Administrator may not terminate the arrangement without the approval of the Trust for Credit Unions' Board of Trustees. </link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets" />
    <link:loc xlink:type="locator" xlink:href="#Item_3" xlink:label="Item_3_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_3_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_18" xlink:label="FeeWaiverOrReimbursementOverAssets_2" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_2">The Administrator has agreed to reduce or limit "Total Annual Portfolio Operating Expenses" of Investor Shares of the Portfolio (excluding distribution and service (12b-1) fees, interest, taxes, brokerage and extraordinary expenses) such that the "Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement" for Investor Shares of the Portfolio is not more than 0.20% of the average daily net assets attributable to Investor Shares of the Portfolio. This expense reduction/limitation will remain in effect through at least December 31, 2013 and, prior to such date, the Administrator may not terminate the arrangement without the approval of the Trust for Credit Unions' Board of Trustees.</link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets_2" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_2" />
    <link:loc xlink:type="locator" xlink:href="#Item_19" xlink:label="Item_19_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_19_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_17" xlink:label="AverageAnnualReturnSinceInception_3" />
    <link:footnote xlink:type="resource" xlink:label="footnote_AverageAnnualReturnSinceInception_3" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AverageAnnualReturnSinceInception_3">Since November 1, 1992</link:footnote>
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    <link:footnote xlink:type="resource" xlink:label="footnote_AverageAnnualReturnSinceInception_4" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AverageAnnualReturnSinceInception_4">Since August 1, 1991.</link:footnote>
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