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  <rr:RedemptionFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">0</rr:RedemptionFee>
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  <rr:BarChartYearToDateReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">2011-09-30</rr:BarChartYearToDateReturnDate>
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  <rr:ExpenseExampleHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;EXAMPLE&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">259</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">202</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;EXAMPLE&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_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_22Dec2010_23Dec2011S000009983_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesUltraShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleShareholderFeesShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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 193% of the average value of its portfolio. &lt;/font&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;Ultra-Short Duration Government Portfolio &lt;/font&gt;</rr:RiskReturnHeading>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0161</rr:AnnualReturn2003>
  <rr:RiskReturnHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;Summary Sections - Money Market Portfolio&lt;/font</rr:RiskReturnHeading>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0002</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0047</rr:BarChartYearToDateReturn>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;www.trustcu.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0106</rr:AnnualReturn2003>
  <rr:RiskReturnHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;Short Duration Portfolio &lt;/font&gt;</rr:RiskReturnHeading>
  <rr:AnnualReturn2003 id="Item_2" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0284</rr:AnnualReturn2003>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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 283% of the average value of its portfolio. &lt;/font&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;www.trustcu.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0122</rr:BarChartYearToDateReturn>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualFundOperatingExpensesUltraShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <dei:EntityRegistrantName contextRef="Duration_22Dec2010_23Dec2011">TRUST FOR CREDIT UNIONS</dei:EntityRegistrantName>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="USD">37</rr:ExpenseExampleYear01>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold TCU Shares of the Portfolio.*&lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;*&amp;nbsp;  &amp;nbsp; &amp;nbsp;  &amp;nbsp; &amp;nbsp;&lt;i&gt;Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.&lt;/i&gt;&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Shareholder Fees&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(fees paid directly from your investment):&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Annual Portfolio Operating Expenses&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:BarChartClosingTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;The total return for the 9-month period ended September&amp;nbsp;30, 2011 was 0.47%.&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Best Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q3&amp;nbsp;'01&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.99%&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Worst Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 1px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q2&amp;nbsp;'04&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;-0.13%&lt;/font&gt;&lt;/p&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">1991-07-10</rr:AverageAnnualReturnInceptionDate>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold TCU&amp;nbsp;Shares* of the Portfolio.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;*&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;Prior to October 1, 2012, the Money Market Portfolio offered only one class of shares, which have been redesignated as TCU Shares.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Shareholder Fees&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(fees paid directly from your investment):&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Annual Portfolio Operating Expenses&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:BarChartClosingTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;The total return for the 9-month period ended September&amp;nbsp;30, 2011 was 0.02%.&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Best Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q1&amp;nbsp;'01&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+1.38%&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Worst Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 1px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q1&amp;nbsp;'10&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+0.02%&lt;/font&gt;&lt;/p&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1-800-342-5828 or 1-800-237-5678&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">1988-05-17</rr:AverageAnnualReturnInceptionDate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">20</rr:ExpenseExampleYear01>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">37</rr:ExpenseExampleYear01>
  <rr:ShareholderFeesCaption contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Shareholder Fees&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(fees paid directly from your investment):&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;Annual Portfolio Operating Expenses&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;(expenses that you pay each year as a percentage of the value of your investment):&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:BarChartClosingTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;The total return for the 9-month period ended September&amp;nbsp;30, 2011 was 1.22%.&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Best Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q3&amp;nbsp;'01&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;+3.08%&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 4px"&gt;&amp;nbsp;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Worst Quarter&lt;/font&gt;&lt;/p&gt; &lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 1px"&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;Q2&amp;nbsp;'04&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;-0.77%&lt;/font&gt;&lt;/p&gt;</rr:BarChartClosingTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold TCU Shares of the Portfolio. * &lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;i&gt;*&amp;nbsp;  &amp;nbsp; &amp;nbsp;  &amp;nbsp; &amp;nbsp;Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.&lt;/i&gt;&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">1992-10-09</rr:AverageAnnualReturnInceptionDate>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">1-800-342-5828 or 1-800-237-5678</rr:PerformanceAvailabilityPhone>
  <rr:BarChartTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsMoneyMarketPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsUltra-ShortDurationGovernmentPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAnnualTotalReturnsShortDurationPortfolioBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <dei:EntityCentralIndexKey contextRef="Duration_22Dec2010_23Dec2011">0000825759</dei:EntityCentralIndexKey>
  <dei:DocumentType contextRef="Duration_22Dec2010_23Dec2011">Other</dei:DocumentType>
  <dei:DocumentCreationDate contextRef="Duration_22Dec2010_23Dec2011">2012-10-01</dei:DocumentCreationDate>
  <dei:DocumentPeriodEndDate contextRef="Duration_22Dec2010_23Dec2011">2011-08-31</dei:DocumentPeriodEndDate>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0015</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0036</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="USD">116</rr:ExpenseExampleYear03>
  <rr:ObjectiveHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;INVESTMENT OBJECTIVE&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ExpenseExampleByYearHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;EXAMPLE&lt;/font&gt;</rr:ExpenseExampleByYearHeading>
  <rr:StrategyHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL INVESTMENT STRATEGIES&lt;/font&gt;</rr:StrategyHeading>
  <rr:PerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;For the period ended December 31, 2010&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0341</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchSixMonthUsTreasuryBillIndex_Member" unitRef="pure">0.0278</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchOneYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0316</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBarclaysCapitalMutualFundShortGovernmentIndex_Member" unitRef="pure">0.0375</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0401</rr:AnnualReturn2002>
  <rr:ObjectiveHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;INVESTMENT&amp;nbsp;OBJECTIVE&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL INVESTMENT STRATEGIES&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Credit/Default Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Interest Rate Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Liquidity Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;The risk that the Portfolio may make investments that may become less liquid in response to market developments or adverse investor perception. 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. &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Management Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;The risk that a strategy used by the Portfolio&amp;#8217;s investment adviser may fail to produce the intended results. &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Market Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Regulatory Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Stable NAV Risk&amp;#8212;&lt;/i&gt;&lt;/b&gt;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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;U.S. Government Securities Risk&amp;#8212;&lt;/i&gt;&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. U.S. government securities 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 the Federal Home Loan Banks chartered or sponsored by Acts of Congress are not backed by the full faith and credit of the United States. It is possible that these issuers will not have the funds to meet their payment obligations in the future.&lt;br/&gt;&lt;br/&gt; &lt;i&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.&lt;/i&gt;&lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;br/&gt;&lt;br/&gt;&lt;b&gt;For the period ended December 31, 2010&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;December 31, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">2001-03-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0138</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">2010-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Call Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Credit/Default Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Extension Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Interest Rate Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Liquidity Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Management Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Market Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Mortgage-Backed Securities Risk&lt;/i&gt;&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (&lt;i&gt;i.e.&lt;/i&gt;, in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (&lt;i&gt;i.e.&lt;/i&gt;, 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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Portfolio Turnover Rate Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;U.S. Government Securities Risk&lt;/i&gt;&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. U.S. government securities issued by Fannie Mae, Freddie Mac and the Federal Home Loan Banks chartered or sponsored by Acts of Congress are not backed by the full faith and credit of the United States. It is possible that these issuers will not have the funds to meet their payment obligations in the future.&lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;   &lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&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. &lt;/i&gt;&lt;/font&gt;&lt;/blockquote&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">2001-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0199</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskLoseMoney contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio.  &lt;/i&gt;&lt;/font&gt;</rr:RiskLoseMoney>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.001</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0022</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0052</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_3" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">-0.0032</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0168</rr:AnnualReturn2002>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0237</rr:AverageAnnualReturnYear10>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">134</rr:ExpenseExampleYear03>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumAccountFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">0</rr:MaximumAccountFee>
  <rr:Component1OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0005</rr:Component1OtherExpensesOverAssets>
  <rr:Component2OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0015</rr:Component2OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0036</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">116</rr:ExpenseExampleYear03>
  <rr:ObjectiveHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;INVESTMENT OBJECTIVE&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:StrategyHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL INVESTMENT STRATEGIES&lt;/font&gt;</rr:StrategyHeading>
  <rr:PerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;AVERAGE ANNUAL TOTAL RETURN&lt;/font&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;For the period ended December 31, 2010&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Call Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Credit/Default Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Extension Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Interest Rate Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Liquidity Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Management Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Market Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Mortgage-Backed Securities Risk&lt;/i&gt;&lt;/b&gt;&amp;#8212;Mortgage-related securities are subject to certain additional risks, including &amp;#8220;extension risk&amp;#8221; (&lt;i&gt;i.e.&lt;/i&gt;, in periods of rising interest rates, issuers may pay principal later than expected) and &amp;#8220;prepayment risk&amp;#8221; (&lt;i&gt;i.e.&lt;/i&gt;, 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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Portfolio Turnover Rate Risk&lt;/i&gt;&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;U.S. Government Securities Risk&lt;/i&gt;&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. U.S. government securities issued by Fannie Mae, Freddie Mac and the Federal Home Loan Banks chartered or sponsored by Acts of Congress are not backed by the full faith and credit of the United States. It is possible that these issuers will not have the funds to meet their payment obligations in the future.&lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;blockquote&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&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. &lt;/i&gt;&lt;/font&gt;&lt;/blockquote&gt;</rr:RiskNarrativeTextBlock>
  <rr:AnnualReturn2002 id="Item_4" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0584</rr:AnnualReturn2002>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0409</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBofaMerrillLynchTwoYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0409</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBarclaysCapitalMutualFundShortOneToThreeYearGovernmentIndex_Member" unitRef="pure">0.0407</rr:AverageAnnualReturnYear10>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;As with any mutual fund, it is possible to lose money on an investment in the Portfolio. &lt;/i&gt;&lt;/font&gt;</rr:RiskLoseMoney>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">2001-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0308</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ProspectusDate contextRef="Duration_22Dec2010_23Dec2011">2011-12-23</rr:ProspectusDate>
  <dei:DocumentEffectiveDate contextRef="Duration_22Dec2010_23Dec2011">2012-10-01</dei:DocumentEffectiveDate>
  <dei:AmendmentFlag contextRef="Duration_22Dec2010_23Dec2011">false</dei:AmendmentFlag>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0016</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.002</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="USD">456</rr:ExpenseExampleYear10>
  <rr:ExpenseHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PORTFOLIO FEES AND EXPENSES&lt;/font&gt;</rr:ExpenseHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PORTFOLIO TURNOVER&lt;/font&gt;</rr:PortfolioTurnoverHeading>
  <rr:RiskHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PERFORMANCE&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0079</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchSixMonthUsTreasuryBillIndex_Member" unitRef="pure">0.0036</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchOneYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0083</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBarclaysCapitalMutualFundShortGovernmentIndex_Member" unitRef="pure">0.0165</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.035</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchSixMonthUsTreasuryBillIndex_Member" unitRef="pure">0.0297</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchOneYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0331</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBarclaysCapitalMutualFundShortGovernmentIndex_Member" unitRef="pure">0.0392</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0361</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_5" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchSixMonthUsTreasuryBillIndex_Member" unitRef="pure">0.0393</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_6" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBofaMerrillLynchOneYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0427</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_7" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberBarclaysCapitalMutualFundShortGovernmentIndex_Member" unitRef="pure">0.0459</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2001 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0647</rr:AnnualReturn2001>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0164</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.03</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0474</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0553</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0421</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0227</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">0.0079</rr:AnnualReturn2010>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PORTFOLIO FEES AND EXPENSES&lt;/font&gt;</rr:ExpenseHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Investments:&lt;/i&gt;&lt;/b&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;The Portfolio invests exclusively in:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Repurchase agreements related to the securities described above &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Federal funds &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PERFORMANCE&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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.* 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;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;*&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;TOTAL RETURN CALENDAR YEAR&lt;/font&gt;</rr:BarChartHeading>
  <rr:RiskMoneyMarketFund contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;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.&lt;/i&gt;&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&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.&lt;/i&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;The total return for the 9-month period ended&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Best Quarter&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Worst Quarter&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0002</rr:BarChartLowestQuarterlyReturn>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Investments:&lt;/b&gt;  The Portfolio invests exclusively in:&lt;/font&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;U.S. Government Securities and related custodial receipts&lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;   		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Repurchase agreements related to the securities described above&lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;   		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Portfolio Duration (under normal interest rate conditions): &lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;   &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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 0.49, 0.98, and 1.91 respectively. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Expected Approximate Interest Rate Sensitivity:&lt;/i&gt;&lt;/b&gt;  Nine-Month Treasury Bill&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Credit Quality:&lt;/b&gt;  U.S. Government Securities&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: ARIAL" size="2"&gt;Investment Adviser&amp;#8217;s Investment Philosophy: &lt;/font&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Take a global perspective to uncover relative value opportunities &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Build a strong team of skilled investors who excel on behalf of our clients &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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.* 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;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;i&gt;*&amp;nbsp;  &amp;nbsp; &amp;nbsp;  &amp;nbsp; &amp;nbsp;Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.&lt;/i&gt;&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;The total return for the 9-month period ended &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Best Quarter&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Worst Quarter&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_MemberC000027607_Member" unitRef="pure">-0.0013</rr:BarChartLowestQuarterlyReturn>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&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, NCUA or any other governmental agency. &lt;/i&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt; The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future. &lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009983_Member" unitRef="pure">1.93</rr:PortfolioTurnoverRate>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0032</rr:OtherExpensesOverAssets>
  <rr:NetExpensesOverAssets id="Item_8" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2001 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0397</rr:AnnualReturn2001>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0126</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0315</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0503</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0516</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0221</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0022</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0009</rr:AnnualReturn2010>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0009</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0252</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="pure">0.0428</rr:AverageAnnualReturnSinceInception>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009982_MemberC000027605_Member" unitRef="USD">622</rr:ExpenseExampleYear10>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0016</rr:ManagementFeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.002</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="USD">456</rr:ExpenseExampleYear10>
  <rr:ExpenseHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PORTFOLIO FEES AND EXPENSES&lt;/font&gt;</rr:ExpenseHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PORTFOLIO TURNOVER&lt;/font&gt;</rr:PortfolioTurnoverHeading>
  <rr:RiskHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PRINCIPAL RISKS OF INVESTING IN THE PORTFOLIO&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;&lt;b&gt;TOTAL RETURN CALENDAR YEAR&lt;/b&gt;&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: ARIAL" size="1"&gt;PERFORMANCE&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Portfolio may also invest in: &lt;/font&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Other U.S. Government Securities and related custodial receipts &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;   		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Repurchase agreements related to the securities described above &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;   		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Portfolio Duration (under normal interest rate conditions): &lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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 1.91 and 2.75, respectively. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;&lt;i&gt;Expected Approximate Interest Rate Sensitivity:&lt;/i&gt;&lt;/b&gt; Two-Year U.S. Treasury Note&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Benchmark:&lt;/b&gt;  The BofA Merrill Lynch Two-Year U.S. Treasury Note Index&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: ARIAL" size="2"&gt;Investment Adviser&amp;#8217;s Investment Philosophy: &lt;/font&gt;&lt;br/&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="2"&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;/font&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Thoughtfully combine diversified sources of return by employing multiple investment strategies &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Take a global perspective to uncover relative value opportunities &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Employ focused specialist teams to identify short-term mispricings and incorporate long-term views &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Emphasize a risk-aware approach as the Investment Adviser views risk management as both an offensive and defensive tool &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;  		 	 &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;blockquote&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Build a strong team of skilled investors who excel on behalf of our clients &lt;/font&gt;&lt;/blockquote&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;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.* 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;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;i&gt;*&amp;nbsp;  &amp;nbsp; &amp;nbsp;  &amp;nbsp; &amp;nbsp;Prior to October 1, 2012, the Portfolio offered only one class of shares, which have been redesignated as TCU Shares.&lt;/i&gt;&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:AnnualReturn2001 id="Item_9" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.08</rr:AnnualReturn2001>
  <rr:AnnualReturn2004 id="Item_10" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.024</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 id="Item_11" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0186</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 id="Item_12" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.048</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 id="Item_13" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0547</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 id="Item_14" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0277</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 id="Item_15" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0427</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 id="Item_16" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.028</rr:AnnualReturn2010>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.028</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBofaMerrillLynchTwoYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0228</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBarclaysCapitalMutualFundShortOneToThreeYearGovernmentIndex_Member" unitRef="pure">0.024</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.0401</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBofaMerrillLynchTwoYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0438</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBarclaysCapitalMutualFundShortOneToThreeYearGovernmentIndex_Member" unitRef="pure">0.0432</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">0.044</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBofaMerrillLynchTwoYearUsTreasuryNoteIndex_Member" unitRef="pure">0.0465</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_17" decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberBarclaysCapitalMutualFundShortOneToThreeYearGovernmentIndex_Member" unitRef="pure">0.0483</rr:AverageAnnualReturnSinceInception>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_Member" unitRef="pure">2.83</rr:PortfolioTurnoverRate>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&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, NCUA or any other governmental agency. &lt;/i&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Portfolio&amp;#8217;s past performance is not necessarily an indication of how it will perform in the future.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;The total return for the 9-month period ended&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Best Quarter&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;Worst Quarter&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_22Dec2010_23Dec2011S000009984_MemberC000027609_Member" unitRef="pure">-0.0077</rr:BarChartLowestQuarterlyReturn>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009982_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedMoneyMarketPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedUltraShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleExpenseExampleTransposedShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009984_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedShortDurationPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_22Dec2010_23Dec2011S000009983_Member">&lt;div style="display:none"&gt;~ http://www.trustcu.com/role/ScheduleAverageAnnualTotalReturnsTransposedUltraShortDurationGovernmentPortfolio column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <link:footnoteLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
    <link:loc xlink:type="locator" xlink:href="#Item_5" 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_6" xlink:label="Item_6_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_6_lbl" xlink:to="footnote_AverageAnnualReturnSinceInception" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_7" 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_17" xlink:label="Item_17_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_17_lbl" xlink:to="footnote_AverageAnnualReturnSinceInception_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_3" 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 the Portfolio (excluding interest, taxes, brokerage and extraordinary expenses) such that the TCU Shares "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_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_FeeWaiverOrReimbursementOverAssets" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_2" xlink:label="AnnualReturn2003" />
    <link:footnote xlink:type="resource" xlink:label="footnote_AnnualReturn2003" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_AnnualReturn2003">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="AnnualReturn2003" xlink:to="footnote_AnnualReturn2003" />
    <link:loc xlink:type="locator" xlink:href="#Item_4" xlink:label="Item_4_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_4_lbl" xlink:to="footnote_AnnualReturn2003" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_14" xlink:label="Item_14_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_9" xlink:label="Item_9_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_11" xlink:label="Item_11_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_15" xlink:label="Item_15_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_16" xlink:label="Item_16_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_13" xlink:label="Item_13_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_10" xlink:label="Item_10_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_12" xlink:label="Item_12_lbl" />
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  </link:footnoteLink>
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