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  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchMicroCapValueFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <dei:DocumentType contextRef="Duration_01Feb2012_31Jan2013">485BPOS</dei:DocumentType>
  <dei:EntityRegistrantName contextRef="Duration_01Feb2012_31Jan2013">WASATCH FUNDS TRUST</dei:EntityRegistrantName>
  <dei:EntityCentralIndexKey contextRef="Duration_01Feb2012_31Jan2013">0000806633</dei:EntityCentralIndexKey>
  <dei:AmendmentFlag contextRef="Duration_01Feb2012_31Jan2013">false</dei:AmendmentFlag>
  <dei:DocumentCreationDate contextRef="Duration_01Feb2012_31Jan2013">2013-01-28</dei:DocumentCreationDate>
  <dei:DocumentEffectiveDate contextRef="Duration_01Feb2012_31Jan2013">2013-01-31</dei:DocumentEffectiveDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchStrategicIncomeFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchStrategicIncomeFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchStrategicIncomeFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchStrategicIncomeFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;WASATCH HERITAGE GROWTH FUND  &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <dei:DocumentPeriodEndDate contextRef="Duration_01Feb2012_31Jan2013">2012-09-30</dei:DocumentPeriodEndDate>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchFrontierEmergingSmallCountriesFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchFrontierEmergingSmallCountriesFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchFrontierEmergingSmallCountriesFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchEmergingMarketsSmallCapFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchEmergingMarketsSmallCapFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchEmergingMarketsSmallCapFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchEmergingMarketsSmallCapFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;WASATCH EMERGING MARKETS SELECT FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchMicroCapFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchMicroCapFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchMicroCapFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchMicroCapFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;WASATCH EMERGING MARKETS SMALL CAP FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchInternationalGrowthFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchInternationalGrowthFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchInternationalGrowthFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchInternationalGrowthFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0125</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" id="Item_2" unitRef="pure">0.0102</rr:OtherExpensesOverAssets>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.007</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" id="Item_3" unitRef="pure">0.0103</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" id="Item_4" unitRef="pure">0.0227</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0095</rr:NetExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.0058</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0169</rr:NetExpensesOverAssets>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="INF" unitRef="USD">97</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="INF" unitRef="USD">320</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="INF" unitRef="USD">561</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="INF" unitRef="USD">1253</rr:ExpenseExampleYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;WASATCH CORE GROWTH FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0175</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 26% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0038</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" id="Item_5" unitRef="pure">0.0213</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">-0.0018</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0195</rr:NetExpensesOverAssets>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is long-term growth of capital. &lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;The Fund invests primarily in growing mid cap companies at reasonable prices.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, the Fund will invest in the equity securities of growing companies with market capitalizations of between $2.5 billion and $15 billion at the time of purchase.&lt;br/&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation.&lt;br/&gt;We focus on companies that we consider to be high quality, and we use a process of &amp;#8220;bottom up&amp;#8221; fundamental analysis to look for individual companies that we believe are stable and have the potential to grow steadily for long periods of time. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers.&lt;br/&gt;The Fund seeks to purchase stocks at prices we believe are reasonable relative to our projection of a company&amp;#8217;s long term earnings growth rate.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including information technology, industrials, consumer discretionary, financials, health care and energy.</rr:StrategyNarrativeTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="INF" unitRef="USD">198</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="INF" unitRef="USD">650</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="INF" unitRef="USD">1128</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="INF" unitRef="USD">2447</rr:ExpenseExampleYear10>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br/&gt;&lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 9/30/11&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;36.15%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/10&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-11.47%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;WASATCH LONG/SHORT FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0458</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0601</rr:AnnualReturn2006>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the Fund&amp;#8217;s operating expenses (as a percentage of net assets) remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0385</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">-0.376</rr:AnnualReturn2008>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="INF" unitRef="USD">172</rr:ExpenseExampleYear01>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.4306</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.2167</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="INF" unitRef="USD">654</rr:ExpenseExampleYear03>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0244</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0945</rr:AnnualReturn2012>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is capital appreciation.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 39% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 71% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Market Direction Risk.&lt;/b&gt; Since the Fund has both a &amp;#8220;long&amp;#8221; and a &amp;#8220;short&amp;#8221; portfolio, an investment in the Fund will involve market risks associated with different types of investment decisions than those made for a typical &amp;#8220;long only&amp;#8221; stock fund. The Fund&amp;#8217;s results will suffer both when there is a general stock market advance and the Fund holds significant &amp;#8220;short&amp;#8221; equity positions, or when there is a general stock market decline and the Fund holds significant &amp;#8220;long&amp;#8221; equity positions.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Short Sales Risk.&lt;/b&gt; The Fund may make short sales of securities, which means it may experience a loss if the market price of the security increases between the date of the short sale and the date the security is replaced. Short sales may reduce the Fund&amp;#8217;s returns or increase volatility.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt;&lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br/&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br/&gt;&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.&lt;br/&gt;&lt;b&gt;Value Investing Risk.&lt;/b&gt; Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br/&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Interest rate risk is the risk that a debt security&amp;#8217;s value will decline due to changes in market interest rates. Even though some interest-bearing securities offer a stable stream of income, their prices will fluctuate with changes in interest rates.&lt;br/&gt;&lt;b&gt;Credit Risk.&lt;/b&gt; Credit risk is the risk that the issuer of a debt security will fail to repay principal and interest on the security when due. Credit risk is affected by the issuer&amp;#8217;s credit status, and is generally higher for non-investment grade securities.&lt;br/&gt;&lt;b&gt;Non-Investment Grade Securities Risk.&lt;/b&gt; Non-investment grade securities (also known as &amp;#8220;high yield&amp;#8221; or &amp;#8220;junk bonds&amp;#8221;), those rated below investment grade by the primary rating agencies (e.g., below BB/Ba by S&amp;amp;P/Moody&amp;#8217;s), tend to have more volatile prices and increased price sensitivity to changing interest rates and adverse economic and business developments than investment grade securities. In addition, compared to investments in investment grade securities, investments in non-investment grade securities are subject to greater risk of loss due to default or decline in credit quality. There is a greater likelihood that adverse economic or company-specific events will make the issuer unable to make interest and/or principal payments, and more susceptible to negative market sentiment, leading to depressed prices and decreased liquidity.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Energy Sector Risk.&lt;/b&gt; The value of energy companies is particularly vulnerable to developments in the energy sector, fluctuations in price and supply of energy fuels, energy conservation, supply of and demand for specific energy-related products or services, and tax policy and other government regulation.&lt;br/&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br/&gt;&lt;b&gt;Information Technology Risk.&lt;/b&gt; Stocks of information technology companies may be volatile because issuers are sensitive to rapid obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. Information technology stocks, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market.&lt;br/&gt;&lt;b&gt;Portfolio Turnover Rate.&lt;/b&gt; The Fund&amp;#8217;s portfolio turnover rate is expected to exceed 200%. This type of Fund has a high portfolio turnover that necessarily results in greater transaction costs and causes more short-term capital gains (or losses) to be realized. Distributions to shareholders of short-term capital gains are taxed as ordinary income under federal income tax laws.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The Fund commenced operations on December 15, 2008, upon the reorganization of the 1st Source Monogram Long/Short Fund, the Fund&amp;#8217;s predecessor fund (the &amp;#8220;Predecessor Fund&amp;#8221;), into the Fund. With the reorganization, the Fund assumed the financial and performance history of the Predecessor Fund. The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based securities market index and an additional comparison index. Past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. In addition, the Predecessor Fund was advised by a different investment advisor and subject to different expenses, which may have produced different investment results. The portfolio managers of the Fund, however, were also the portfolio managers of the Predecessor Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;WASATCH LONG/SHORT FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000018772_Member" decimals="4" unitRef="pure">0.39</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;WASATCH HERITAGE GROWTH FUND  &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;The Fund invests primarily in companies of all market capitalizations that are tied economically to emerging market countries.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s assets in the equity securities (including common stock, preferred stock and securities convertible into common stock) of companies that are tied economically to emerging market countries.&lt;br/&gt;Emerging market countries are those currently included in the Morgan Stanley Capital International (MSCI) Emerging Markets Index. We will generally consider qualifying investments to be in companies that are listed on an exchange in an emerging market country, that have at least 50% of their assets in an emerging market country, or that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services performed in an emerging market country.&lt;br/&gt;We travel extensively outside the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis with the goal of owning the highest quality growth companies tied economically to emerging market countries. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, suppliers and customers.&lt;br/&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors.&lt;br/&gt;The Fund may invest in initial public offerings (IPOs) and early stage companies.&lt;br/&gt;The Fund is non-diversified, meaning that it can concentrate investments in a more limited number of issuers than a diversified fund. Under normal market conditions, the Fund will generally invest in 30 to 50 companies; however, we may invest in fewer or more companies when we believe it is necessary to achieve the Fund&amp;#8217;s investment objective.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;The Fund invests primarily in small companies tied economically to emerging markets.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s assets in the equity securities (including common stock, preferred stock and securities convertible into common stock) of companies with market capitalizations of less than US$3 billion at the time of purchase that are tied economically to emerging market countries.&lt;br/&gt;Emerging market countries are those currently included in the Morgan Stanley Capital International (MSCI) Emerging Markets Index. We will generally consider qualifying investments to be in companies that are listed on an exchange in an emerging market country, that have at least 50% of their assets in an emerging market country, or that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services performed in an emerging market country.&lt;br/&gt;We travel extensively outside of the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies that we believe have above average revenue and earnings growth potential.&lt;br/&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including consumer discretionary, financials, industrials, consumer staples, materials, energy, information technology and health care.</rr:StrategyNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.1791</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">-0.2331</rr:BarChartLowestQuarterlyReturn>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 28% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;The Fund invests primarily in equity securities by maintaining long equity positions and short equity positions. &lt;/b&gt;&lt;br /&gt;We seek to achieve higher risk-adjusted returns with lower volatility compared to the equity markets in general (as represented by the S&amp;amp;P 500 Index). Under normal market conditions, we will invest the Fund&amp;#8217;s assets in the equity securities of companies with market capitalizations of at least $100 million at the time of purchase that we have identified as being undervalued (long equity positions) and we will sell short those securities (short equity positions) that we have identified as being overvalued. The equity securities in which the Fund invests include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, warrants and any rights to purchase common stocks and other securities with equity characteristics. &lt;br /&gt;The Fund may at any time have either a net long exposure or a net short exposure to the equity markets and the Fund will not be managed to maintain either net long or net short market exposure. &lt;br /&gt;The Fund may invest in early stage companies and initial public offerings (IPOs). &lt;br /&gt;We believe that the best opportunities to make both short and long equity investments are when the market&amp;#8217;s perception of the values of individual companies (measured by the stock price) differs widely from our assessment of the intrinsic values of such companies. We further believe that opportunities to invest in undervalued and overvalued stocks arise due to a variety of market inefficiencies including:&lt;ul type="square"&gt;&lt;li&gt;Changes in market participant psychology and circumstances.&lt;/li&gt;&lt;li&gt;Imperfect information.&lt;/li&gt;&lt;li&gt;Forecasts and projections by Wall Street analysts and company representatives that differ from experienced reality.&lt;/li&gt;&lt;/ul&gt;When evaluating a potential long or short investment for the Fund, we employ a comprehensive valuation analysis intended to establish a range for fair valuation or intrinsic company value, with particular emphasis on company fundamentals.&lt;br/&gt;Along with long positions, the Long/Short Fund intends to engage in short sales of securities of companies that we believe:&lt;ul type="square"&gt;&lt;li&gt;Have earnings that appear to be reflected in the current price.&lt;/li&gt;&lt;li&gt;Are likely to fall short of market expectations.&lt;/li&gt;&lt;li&gt;Are in industries exhibiting weaknesses.&lt;/li&gt;&lt;li&gt; Have poor management.&lt;/li&gt;&lt;li&gt;Are likely to suffer an event affecting long-term earnings.&lt;/li&gt;&lt;/ul&gt;The Fund may invest in fixed income securities of any maturity consisting of corporate notes, bonds and debentures, including those that are rated less than investment grade at the time of purchase. &lt;br /&gt;The Fund is non-diversified meaning that it can concentrate investments in a more limited number of issuers than a diversified fund. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including information technology, financials, energy, consumer discretionary, materials, industrials and consumer staples. &lt;br /&gt; The Fund is expected to have a high portfolio turnover rate.</rr:StrategyNarrativeTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0945</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0875</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0707</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberRussellMidcapGrowthIndex_Member" decimals="4" unitRef="pure">0.1581</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.16</rr:AverageAnnualReturnYear01>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0402</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0375</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.034</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberRussellMidcapGrowthIndex_Member" decimals="4" unitRef="pure">0.0323</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.0166</rr:AverageAnnualReturnYear05>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0537</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0489</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000881_MemberC000002499_Member" decimals="4" unitRef="pure">0.0456</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberRussellMidcapGrowthIndex_Member" decimals="4" unitRef="pure">0.0714</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.049</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;16.00%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-15.94%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;The Fund invests primarily in smaller growing companies at reasonable prices. &lt;/b&gt;&lt;br /&gt;Under normal market conditions, we will invest at least 65% of the Fund&amp;#8217;s net assets in the equity securities of growing companies. These companies are usually small to mid-size with market capitalizations of less than $5 billion at the time of purchase. &lt;br /&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation. &lt;br /&gt;We focus on companies that we consider to be high quality. We use a process of &amp;#8220;bottom-up&amp;#8221; fundamental analysis to look for individual companies that we believe are stable and have the potential to grow steadily for long periods of time. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br /&gt;The Fund seeks to purchase stocks at prices we believe are reasonable relative to our projection of a company&amp;#8217;s long term earnings growth rate. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including industrials, financials, consumer discretionary, information technology and health care.</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;WASATCH-HOISINGTON U.S. TREASURY FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt;&lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt;&lt;b&gt;Convertible Securities Risk.&lt;/b&gt; Generally, convertible securities offer lower interest or dividend yields than non-convertible securities of similar quality and less potential for gains or capital appreciation in a rising stock market than other equity securities. They tend to be more volatile than other fixed income securities, and the markets for convertible securities may be less liquid than the markets for common stocks or bonds. The value of convertible securities is susceptible to the risk of market losses attributable to changes in interest rates. An issuer may have the right to buy back certain convertible securities at a time and price that is unfavorable to the Fund.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br/&gt;&lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br/&gt;&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; Because the Fund is non-diversified and generally invests in 30 to 50 companies, the Fund will have more exposure to the price movements of a single security or a small group of securities than funds that diversify their investments among many companies. The Fund&amp;#8217;s total return and net asset value could fluctuate more than if a greater number of securities were held.</rr:RiskNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is to provide a rate of return that exceeds the rate of inflation over a business cycle by investing in U.S. Treasury securities with an emphasis on both income and capital appreciation.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;WASATCH INTERNATIONAL GROWTH FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;WASATCH GLOBAL OPPORTUNITIES FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt;  The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt;  The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt;  Small cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br/&gt;&lt;b&gt;Growth Stock Risk.&lt;/b&gt;  Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.71</rr:PortfolioTurnoverRate>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Investor Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Emerging Markets Select Fund has only recently commenced operations and does not have a full calendar year of performance.</rr:PerformanceNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br/&gt; The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt; &lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt; &lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt; &lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt; &lt;b&gt;Smaller Company Stock Risk.&lt;/b&gt; Small and mid cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br/&gt; &lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 13% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNondiversifiedStatus>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based bond market index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;WASATCH-HOISINGTON U.S. TREASURY FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0017</rr:OtherExpensesOverAssets>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000881_MemberC000002499_Member">2004-06-18</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member">2004-06-18</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000881_MemberC000002499_Member">2004-06-18</rr:AverageAnnualReturnInceptionDate>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:OtherExpensesNewFundBasedOnEstimates contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">Other Expenses are based on estimated expenses for the Investor Class of the Fund for its first full fiscal year.</rr:OtherExpensesNewFundBasedOnEstimates>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based securities market index and an additional comparison index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">Past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; Because the Fund is non-diversified and generally invests in 30 to 50 companies, the Fund will have more exposure to the price movements of a single security or a small group of securities than funds that diversify their investments among many companies. The Fund&amp;#8217;s total return and net asset value could fluctuate more than if a greater number of securities were held.</rr:RiskNondiversifiedStatus>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceOneYearOrLess contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Investor Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Emerging Markets Select Fund has only recently commenced operations and does not have a full calendar year of performance.</rr:PerformanceOneYearOrLess>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.0125</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.0031</rr:OtherExpensesOverAssets>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000882_Member" decimals="4" unitRef="pure">0.13</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchEmergingMarketsSelectFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0447</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0382</rr:AnnualReturn2005>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="INF" unitRef="USD">154</rr:ExpenseExampleYear01>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1472</rr:AnnualReturn2006>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0498</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.2093</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.3007</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0941</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0177</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0867</rr:AnnualReturn2012>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.015</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;WASATCH EMERGING MARKETS SMALL CAP FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchEmergingMarketsSelectFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="INF" unitRef="USD">478</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="INF" unitRef="USD">824</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="INF" unitRef="USD">1801</rr:ExpenseExampleYear10>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchEmergingMarketsSelectFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">-0.5708</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">1.1772</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.4122</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">-0.1401</rr:AnnualReturn2011>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0867</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0863</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0569</rr:AverageAnnualReturnYear01>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.2775</rr:AnnualReturn2012>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.16</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberCitigroupThreeMonthUsTreasuryBillsIndex_Member" decimals="4" unitRef="pure">0.0007</rr:AverageAnnualReturnYear01>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" id="Item_6" unitRef="pure">0.0157</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" id="Item_7" unitRef="pure">0.0184</rr:ExpensesOverAssets>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;WASATCH MICRO CAP FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital. Income is an objective only when consistent with long-term growth of capital. &lt;/b&gt;Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0447</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0425</rr:AverageAnnualReturnYear05>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;17.91%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-23.31%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.037</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.0166</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberCitigroupThreeMonthUsTreasuryBillsIndex_Member" decimals="4" unitRef="pure">0.0045</rr:AverageAnnualReturnYear05>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.06</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0523</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0476</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.061</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberCitigroupThreeMonthUsTreasuryBillsIndex_Member" decimals="4" unitRef="pure">0.0172</rr:AverageAnnualReturnSinceInception>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 25% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.28</rr:PortfolioTurnoverRate>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000885_Member" decimals="4" unitRef="pure">0.25</rr:PortfolioTurnoverRate>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.561</rr:BarChartHighestQuarterlyReturn>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">-0.3216</rr:BarChartLowestQuarterlyReturn>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000881_Member" decimals="4" unitRef="pure">0.26</rr:PortfolioTurnoverRate>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;The Fund invests primarily in growing micro cap companies. &lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in the equity securities of micro cap companies with market capitalizations of less than $1 billion at the time of purchase. &lt;br /&gt; The Fund may invest up to 30% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation. &lt;br /&gt; We focus on companies that we consider to be high quality, and we use a process of &amp;#8220;bottom up&amp;#8221; fundamental analysis to look for individual companies that we believe have superior growth potential. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br /&gt; The Fund seeks to purchase stocks at prices we believe are reasonable relative to our projection of a company&amp;#8217;s long term earnings growth rate. &lt;br /&gt; The Fund may invest a large percentage of its assets in a few sectors, including information technology, health care, industrials, financials and consumer discretionary. &lt;br /&gt; The Fund may invest in initial public offerings (IPOs).</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt; The Fund is subject to the following principal investment risks:&lt;br /&gt; &lt;b&gt;Stock Market Risk. &lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt; &lt;b&gt;Stock Selection Risk. &lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt; &lt;b&gt;Foreign Securities&lt;/b&gt; &lt;b&gt;Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt; &lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt; &lt;b&gt;Micro Cap Company Stock Risk. &lt;/b&gt; Micro cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br /&gt; &lt;b&gt;Growth Stock Risk. &lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br /&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors.&lt;br /&gt; &lt;b&gt;Financials Sector Risk. &lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br /&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.</rr:RiskNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;WASATCH CORE GROWTH FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="INF" unitRef="USD">187</rr:ExpenseExampleYear01>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="INF" unitRef="USD">579</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="INF" unitRef="USD">996</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="INF" unitRef="USD">2158</rr:ExpenseExampleYear10>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="INF" unitRef="USD">160</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="INF" unitRef="USD">496</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="INF" unitRef="USD">856</rr:ExpenseExampleYear05>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="INF" unitRef="USD">1868</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 38% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 44% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchLargeCapValueFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000883_Member" decimals="4" unitRef="pure">0.44</rr:PortfolioTurnoverRate>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000022592_Member" decimals="4" unitRef="pure">0.38</rr:PortfolioTurnoverRate>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;29.50%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-27.03%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;WASATCH FRONTIER EMERGING SMALL COUNTRIES FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119725_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;The Fund invests primarily in foreign growth companies.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest the Fund&amp;#8217;s assets in the equity securities of foreign companies with market capitalizations of less than US$5 billion at the time of purchase. Under normal market conditions, the Fund will invest in at least five of the countries included in the Morgan Stanley Capital International (MSCI) All Country (AC) World Ex-U.S.A. Small Cap Index.&lt;br/&gt;The Fund may invest a significant amount of its total assets (5% to 70% under normal market conditions) at the time of purchase in securities issued by companies domiciled in emerging markets. Emerging market countries are those currently included in the MSCI EFM (Emerging + Frontier Markets) Index. These companies typically are located in the Asia-Pacific region, Eastern Europe, the Middle East, Central and South America, and Africa.&lt;br/&gt;We travel extensively outside of the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies that we believe have above average revenue and earnings growth potential. We may invest in early stage companies if we believe they have outstanding long-term growth potential.&lt;br/&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including consumer discretionary, financials, industrials, information technology, materials, consumer staples, health care and energy.</rr:StrategyNarrativeTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;WASATCH MICRO CAP FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance.</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;Average Annual Total Returns  &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;The Fund invests primarily in the equity securities of companies of all market capitalizations that are tied economically to frontier markets and small emerging market countries. &lt;/b&gt;&lt;br /&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s assets in the equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights and other securities with equity characteristics) of companies that are tied economically to frontier markets and small emerging market countries. &lt;br /&gt;&amp;#8220;Frontier markets&amp;#8221; include any country that is outside the Morgan Stanley Capital International (MSCI) All Country World Index, and also any country that is currently included in the Russell Frontier Index, the S&amp;amp;P Frontier Broad Market Index (BMI), the MSCI Frontier Markets Index, or similar market indices, or that, in our opinion, have similar characteristics regardless of their inclusion in an index. &lt;br /&gt;&amp;#8220;Emerging markets&amp;#8221; include those countries currently considered to be developing as per their inclusion in the MSCI Emerging Markets Index. We consider a &amp;#8220;small emerging market country&amp;#8221; to be any country that individually constitutes not more than 7% of the MSCI Emerging Markets Index or the S&amp;amp;P Emerging BMI. &lt;br /&gt;We will generally consider qualifying investments to be in companies that are listed on an exchange in a frontier market or small emerging market country, that are legally domiciled in a frontier market or small emerging market country, that have at least 50% of their assets in a frontier market or small emerging market country, or that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services provided in a frontier market or small emerging market country. The Fund will not be required to sell a security because the market to which it is economically tied is no longer what we consider to be a frontier market or a small emerging market country. &lt;br /&gt;In general, frontier markets and small emerging market countries, with the exception of the oil-producing Persian Gulf States, tend to have relatively low gross national product per capita compared to the larger traditionally-recognized emerging markets and the world&amp;#8217;s major developed economies. Frontier and small emerging market countries include the least developed markets even by emerging market standards. We believe frontier markets and small emerging market countries offer investment opportunities that arise from long-term trends in demographics, deregulation, offshore outsourcing and improving corporate governance. &lt;br /&gt;The Fund may invest in the equity securities of companies of any size, although we expect a significant portion of the Fund&amp;#8217;s assets to be invested in the equity securities of companies under US$3 billion at the time of purchase. &lt;br /&gt;We travel extensively outside the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis with the goal of owning the highest quality growth companies tied economically to frontier markets and small emerging market countries. &lt;br /&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including financials. &lt;br /&gt;We may also invest in initial public offerings (IPOs). &lt;br /&gt;The Fund is non-diversified, meaning that it can concentrate investments in a more limited number of issuers than a diversified fund.</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;WASATCH STRATEGIC INCOME FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is to capture current income.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.295</rr:BarChartHighestQuarterlyReturn>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk. &lt;/b&gt;Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Frontier Markets Risk. &lt;/b&gt;In addition to the risks of investing in foreign securities and emerging markets, frontier market securities involve unique risks, such as exposure to economies less diverse and mature than those of the U.S. or more established foreign markets. Economic or political instability may cause larger price changes in frontier market securities than in securities of issuers based in more developed foreign countries, including securities of issuers in larger emerging markets. Frontier markets generally receive less investor attention than developed markets and larger emerging markets. These risks can result in the potential for extreme price volatility and illiquidity.&lt;br /&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br /&gt;&lt;b&gt;Growth Stock Risk. &lt;/b&gt;Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br /&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk. &lt;/b&gt;IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br /&gt;&lt;b&gt;Financials Sector Risk. &lt;/b&gt;The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br /&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; From time to time, the trading market for a particular security or type of security in which the Fund invests may become less liquid or even illiquid. Reduced liquidity will have an adverse impact on the Fund&amp;#8217;s ability to sell such securities when necessary to meet the Fund&amp;#8217;s liquidity needs or in response to a specific economic event. Market quotations for such securities may be volatile.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Non-Diversification Risk. &lt;/b&gt;The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNarrativeTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.2703</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;Non-Diversification Risk. &lt;/b&gt;The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNondiversifiedStatus>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">&lt;b&gt;PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Investor Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Frontier Emerging Small Countries Fund commenced operations on January 31, 2012 and does not have a full calendar year of performance.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceOneYearOrLess contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Investor Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Frontier Emerging Small Countries Fund commenced operations on January 31, 2012 and does not have a full calendar year of performance.</rr:PerformanceOneYearOrLess>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchHeritageGrowthFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.2744</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.3116</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchLargeCapValueFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchHeritageGrowthFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;  The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt; &lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt; &lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt; &lt;b&gt;Emerging and Frontier Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging and frontier market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt; &lt;b&gt;Small Company Stock Risk. &lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br/&gt; &lt;b&gt;Growth Stock Risk. &lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt; &lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchLargeCapValueFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchHeritageGrowthFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;The Fund invests primarily in small and micro cap foreign and domestic companies.&lt;/b&gt;&lt;br/&gt; Under normal market conditions, we will invest the Fund&amp;#8217;s assets in equity securities (including common stock, preferred stock and securities convertible into common stock) of foreign and domestic companies with market capitalizations of less than US$5 billion at the time of purchase. The Fund may invest a significant portion of its total assets (up to 35% under normal market conditions) in securities of companies with market capitalizations greater than US$5 billion at the time of purchase when the companies meet our investment criteria. The Fund may also invest a significant portion of its total assets in micro cap companies with market capitalizations below US$1 billion (up to 90% under normal market conditions).&lt;br/&gt; The Fund will typically invest in securities issued by companies domiciled in at least three countries, including the United States. The Fund may invest a significant portion of its total assets in companies domiciled in foreign countries (up to 80% under normal market conditions). Securities issued by foreign companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as &amp;#8220;foreign companies&amp;#8221; and are not subject to this limitation.&lt;br/&gt; The Fund may invest a significant amount of its total assets (5% to 50% under normal market conditions) at the time of purchase in securities issued by companies domiciled in emerging markets. Emerging market countries are those currently included in the Morgan Stanley Capital International (MSCI) EFM (Emerging + Frontier Markets) Index. These companies typically are located in the Asia-Pacific region, Eastern Europe, the Middle East, Central and South America, and Africa.&lt;br/&gt; We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies that we believe are the World&amp;#8217;s Best Growth Companies.&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;&amp;#174;&lt;/sup&gt; We travel extensively to visit companies and expect to meet with senior management.&lt;br/&gt; We may also invest in growth companies that we believe have had a temporary setback and therefore have appealing valuation relative to their long-term growth potential.&lt;br/&gt; At times, we may invest in early stage companies with limited or no earnings history if we believe they have outstanding long-term growth potential. We may also invest in initial public offerings (IPOs).&lt;br/&gt; We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries. We may significantly shift Fund assets between asset classes, sectors, and geographic regions based on where we believe the best growth opportunities and valuations currently exist. The Fund may invest a large percentage of its assets in a few regions or sectors, including industrials, information technology, consumer discretionary, health care, financials, materials and energy.</rr:StrategyNarrativeTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;b&gt;In pursuit of the Fund&amp;#8217;s investment objective, Hoisington Investment Management Company (HIMCO), the Fund&amp;#8217;s Sub-Advisor will: &lt;/b&gt;&lt;br/&gt;  &lt;ul type="square"&gt;&lt;li&gt;Typically invest at least 90% of the Fund&amp;#8217;s total assets in U.S. Treasury securities and in repurchase agreements collateralized by such securities.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;Adjust the average maturity and effective duration of the Fund&amp;#8217;s portfolio based on HIMCO&amp;#8217;s assessment of multi-year trends in national and international economic conditions and interest rates, changes in inflationary pressures, and the value of long term U.S. Treasury bonds (maturities longer than 20 years) relative to inflation.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;Invest in long-term U.S. Treasury bonds, including U.S. Treasury Strips (zero coupon Treasury securities), when HIMCO determines that economic conditions suggest lower inflation and the multi-year trend is toward decreasing interest rates.&lt;br/&gt;&lt;/li&gt;   &lt;li&gt;Invest in U.S. Treasury bills or notes (maturities less than five years) when HIMCO determines that economic conditions suggest rising inflation and the multi-year trend is toward increasing interest rates.&lt;br/&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;b&gt;Over the course of a business cycle, under normal market conditions: &lt;/b&gt;&lt;br/&gt;  &lt;ul type="square"&gt;&lt;li&gt;The effective duration of the Fund&amp;#8217;s holdings is expected to vary from less than a year to a maximum of 25 years.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;The Fund&amp;#8217;s holdings will range in maturity from less than a year to a maximum of the longest maturity Treasury bonds available.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;When the Fund is invested in longer weighted average maturities it will be more sensitive to changes in market interest rates and its share price may be subject to greater volatility.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;The Fund&amp;#8217;s portfolio turnover rate will vary substantially from year to year. During some periods, turnover will be well below 50%. At other times, turnover could exceed 200% annually. At these times, increased portfolio turnover may result in higher transaction costs and may also result in taxable capital gains.&lt;br/&gt;&lt;/li&gt;  &lt;li&gt;Portfolio adjustments may require the sale of securities prior to their maturity date. The goal of these transactions will be to increase income and/or change the duration of the overall portfolio.&lt;br/&gt;&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0.0175</rr:ManagementFeesOverAssets>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchHeritageGrowthFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="INF" unitRef="USD">228</rr:ExpenseExampleYear01>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" id="Item_8" unitRef="pure">0.0189</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="INF" unitRef="USD">987</rr:ExpenseExampleYear03>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0195</rr:ManagementFeesOverAssets>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="INF" unitRef="USD">3809</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="INF" unitRef="USD">1766</rr:ExpenseExampleYear05>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0019</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" id="Item_9" unitRef="pure">0.0364</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" id="Item_10" unitRef="pure">0.0214</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">-0.0139</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">0.0225</rr:NetExpensesOverAssets>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;WASATCH INTERNATIONAL GROWTH FUND &amp;#8212; INVESTOR CLASS &lt;br/&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000881_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchHeritageGrowthFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.4496</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.2293</rr:AnnualReturn2004>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt; The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Credit Risk.&lt;/b&gt; Credit risk is the risk that the issuer of a debt security will fail to repay principal and interest on the security when due. HIMCO seeks to limit credit risk by investing primarily in U.S. Treasury securities backed by the full faith and credit of the U.S. government which are viewed as carrying minimal credit risk.&lt;br/&gt; &lt;b&gt;Interest Rate Risk. &lt;/b&gt;Interest rate risk is the risk that a debt security&amp;#8217;s value will decline due to changes in market interest rates. Even though some interest-bearing securities offer a stable stream of income, their prices will fluctuate with changes in interest rates.&lt;br/&gt;  &lt;b&gt;Income Risk. &lt;/b&gt;Income risk is the potential for a decline in the Fund&amp;#8217;s income due to falling interest rates.&lt;br/&gt; &lt;b&gt;Effective Duration.&lt;/b&gt; Effective duration is a measure of the responsiveness of a bond&amp;#8217;s price to market interest rate changes. For example, if the interest rate increased 1%, a bond with an effective duration of five years would experience a decline in price of 5%. Similarly, if the interest rate increased 1%, the price of a bond with an effective duration of 15 years would decline 15%. At a yield of 5%, the effective duration of the longest maturity U.S. Treasury bond is about 15 years. The effective duration of the longest maturity U.S. zero coupon bond is 30 years. If the interest rate increased 1%, the value of the longest maturity zero coupon bond would decline 30%. Similarly, if the interest rate decreased 1%, the value of the longest maturity zero coupon bond would increase 30%.&lt;br/&gt;  &lt;b&gt;Risks of Repurchase Agreements.&lt;/b&gt; The main risk of a repurchase agreement is that the original seller might default on its obligation to repurchase the securities. If the seller defaults, the Fund will seek to recover its investment by selling the collateral and could encounter restrictions, costs or delays. The Fund will suffer a loss if it sells the collateral for less than the repurchase price.&lt;br/&gt;  &lt;b&gt;Risks of Zero Coupon Treasury Securities. &lt;/b&gt;The market prices of zero coupon securities, which do not entitle the holder to periodic interest payments, are generally more volatile than the market prices of securities of comparable quality and similar maturity that do pay interest periodically. Zero coupon securities are more sensitive to fluctuations in interest rates than non-zero coupon securities.&lt;br/&gt;</rr:RiskNarrativeTextBlock>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.1837</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.2379</rr:AnnualReturn2006>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="INF" unitRef="USD">217</rr:ExpenseExampleYear01>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.1247</rr:AnnualReturn2007>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="INF" unitRef="USD">670</rr:ExpenseExampleYear03>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">-0.5393</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.6419</rr:AnnualReturn2009>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="INF" unitRef="USD">1149</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.3424</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="INF" unitRef="USD">2472</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">-0.1204</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.3308</rr:AnnualReturn2012>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.1185</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.1185</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.077</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.1975</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.0011</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.0013</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.0011</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.0146</rr:AverageAnnualReturnYear05>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0836</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0713</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0716</rr:AverageAnnualReturnYear10>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.0842</rr:AverageAnnualReturnYear10>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member">2011-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.3615</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member">2010-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">-0.1147</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchStrategicIncomeFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.4188</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0023</rr:OtherExpensesOverAssets>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" id="Item_11" unitRef="pure">0.0123</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.007</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0044</rr:OtherExpensesOverAssets>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 57% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="INF" unitRef="USD">125</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="INF" unitRef="USD">390</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="INF" unitRef="USD">675</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0129</rr:AnnualReturn2003>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt; The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt; &lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt; &lt;b&gt;Region Risk.&lt;/b&gt; Social, political and economic conditions and changes in regulatory, tax, or economic policy in a country or region could significantly affect the market in that country or region. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact the issuers of securities in a different country or region. From time to time, a small number of companies and industries may represent a large portion of the market in a particular country or region, and these companies and industries can be sensitive to adverse social, political, economic, or regulatory developments.&lt;br/&gt; &lt;b&gt;Foreign Securities&lt;/b&gt; &lt;b&gt;Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt; &lt;b&gt;Emerging and Frontier Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging and frontier market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt; &lt;b&gt;Micro Cap and Small Company Stock Risk.&lt;/b&gt; Micro cap and small company stocks may be very sensitive to changing economic conditions and market downturns.&lt;br/&gt; &lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br/&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br/&gt; &lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt; &lt;b&gt;Value Investing Risk.&lt;/b&gt; Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth, and is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors.&lt;br/&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="INF" unitRef="USD">1487</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.1022</rr:AnnualReturn2004>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0009</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.1049</rr:AnnualReturn2005>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" id="Item_12" unitRef="pure">0.0123</rr:ExpensesOverAssets>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">-0.0018</rr:AnnualReturn2006>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000009843_Member" decimals="4" unitRef="pure">0.57</rr:PortfolioTurnoverRate>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.1</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.3777</rr:AnnualReturn2008>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1919</rr:AverageAnnualReturnYear01>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">-0.2256</rr:AnnualReturn2009>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1919</rr:AverageAnnualReturnYear01>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.1018</rr:AnnualReturn2010>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">-0.0019</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0481</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.4123</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0471</rr:AverageAnnualReturnYear05>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;The Fund invests primarily in income-producing securities.&lt;/b&gt;&lt;br /&gt;Under normal market conditions, we will invest the Fund&amp;#8217;s assets in income-producing domestic and foreign securities, including equity securities (common stock, preferred stocks and securities convertible into common stock) and fixed income securities of companies of all market capitalizations. The Fund is not managed as a balanced portfolio. At times, one type of security may make up a substantial portion of the Fund, while other types may have minimal or no representation. &lt;br /&gt;The Fund may invest its assets in securities issued by foreign companies in developed countries without limit. To a lesser extent, the Fund may invest in foreign companies in emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies. &lt;br /&gt;In our search for investments, we maintain the flexibility to invest in companies from a variety of industries. The Fund, however, does have a concentration in the financials sector &amp;#8212; meaning that at least 25% of the Fund&amp;#8217;s total assets will be invested in securities of issuers in the group of industries in the financials sector. For both domestic and foreign securities, we define the group of industries comprising the financials sector to include, among others, Banks (Commercial Banks, Thrifts and Mortgage Finance), Diversified Financial Companies (Diversified Financial Services, Consumer Finance, Capital Markets), Finance Companies, Financial Data Processing Services and Systems, Finance Companies (Small Loan), Financial Information Services, Insurance Companies (Life, Multi-Line, Property-Casualty), Investment Management Companies, Real Estate Companies (Real Estate Investment Trusts [REITs], Real Estate Management and Development Companies), Rental and Leasing Services (Commercial), Savings and Loans, and Securities Brokerage and Services. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including financials, information technology and health care. &lt;br /&gt;The Fund may invest in exchange-traded funds (ETFs). &lt;br /&gt;The Fund may make short sales of securities, and may also use derivatives such as put and call options and futures contracts for hedging and non-hedging purposes. The Fund may write put and call options subject to applicable law and SEC guidelines. &lt;br /&gt;In the selection of equity securities, we use &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies with attractive, sustainable dividend yields or the potential for dividend growth. In certain situations, the Fund may acquire non-income producing securities if we believe the company has the potential to pay dividends in the future. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br /&gt;Characteristics we consider when investing in equity securities generally include:&lt;ul type="square"&gt;&lt;li&gt;Attractive, sustainable dividend yields or the potential for dividend growth.&lt;/li&gt;&lt;li&gt;Experienced top management.&lt;/li&gt;&lt;li&gt;Sustainable competitive advantage.&lt;/li&gt;&lt;li&gt;Stable demand for products and services.&lt;/li&gt;&lt;li&gt;Ability to capitalize on favorable long-term trends.&lt;/li&gt;&lt;/ul&gt;The Fund&amp;#8217;s investments in fixed income securities may include domestic and foreign corporate bonds with a variety of maturities (e.g., long-term, intermediate or short-term) and credit qualities (e.g., investment grade or non-investment grade). At certain times the Fund may emphasize one particular maturity or credit quality. The Fund may invest in non-investment grade securities without limitation. The Fund may also invest in U.S. Treasury securities and the debt obligations of foreign governments. &lt;br /&gt;Characteristics we consider when investing in fixed income securities generally include:&lt;ul type="square"&gt;&lt;li&gt;Rates of current income.&lt;/li&gt;&lt;li&gt;Credit quality of the issuer.&lt;/li&gt;&lt;li&gt;Maturity, duration and other characteristics of the obligation.&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0278</rr:AnnualReturn2012>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0104</rr:NetExpensesOverAssets>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0958</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.088</rr:AverageAnnualReturnYear10>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Smaller Company Stock Risk. &lt;/b&gt;Small and mid cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it will have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br /&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt; The Fund may suffer a loss from its use of put and call options and futures contracts, which are forms of derivatives. Derivatives can amplify a gain or loss, potentially earning or losing substantially more money than the actual cost of the derivative instrument, with the potential for unlimited losses on certain instruments. Derivatives may be difficult to value, may become illiquid, and may affect the timing and character of taxes payable by shareholders.&lt;br /&gt;&lt;b&gt;Short Sales Risk.&lt;/b&gt; The Fund may make short sales of securities, which means it may experience a loss if the market price of the security increases between the date of the short sale and the date the security is replaced. Short sales may reduce a Fund&amp;#8217;s returns or increase volatility.&lt;br /&gt;&lt;b&gt;Investment Companies Risk. &lt;/b&gt;The Fund may invest in shares of other investment companies, including foreign and domestic registered and unregistered open-end funds, closed-end funds, and unit investment trusts and exchange-traded funds noted below. Investing in another investment company subjects the Fund to the same risks associated with investing in the securities held by the applicable investment company and the investment strategies employed by such funds (such as the use of leverage). In addition, the benefit of investing in another investment company is largely dependent on the skill of the investment advisor of the underlying company and whether the associated fees and costs involved with investing in such company are offset by the potential gains. As a shareholder in an investment company, a fund will bear its ratable share of that investment company&amp;#8217;s expenses including advisory and administrative fees. Shareholders would therefore be subject to duplicative expenses to the extent that the Fund invests in other investment companies.&lt;br /&gt;&lt;b&gt;Exchange-Traded Funds (ETFs) Risk. &lt;/b&gt;ETFs are investment companies that are bought and sold on a securities exchange. Shares of ETFs are redeemable only in larger aggregations of a specified number of shares and generally on an in-kind basis. When the Fund invests in an ETF, it will bear additional expenses based on its pro rata share of the ETF&amp;#8217;s operating expenses. In addition, the Fund will incur brokerage costs when purchasing and selling shares of ETFs. The risk of owning an ETF generally reflects the risks of the underlying securities held by the ETF and investment strategies employed by such ETF (such as the use of leverage). The market price may also fluctuate due to the supply and demand of the ETF&amp;#8217;s shares on the exchange upon which its shares are traded. Lack of liquidity in an ETF could result in the ETF being more volatile than the underlying portfolio of securities. In addition, because of ETF expenses, compared to owning the underlying securities directly, it may be more costly to own an ETF.&lt;br /&gt;&lt;b&gt;REIT Risk. &lt;/b&gt;Investments in real estate investment trusts (REITs) subject the Fund to risks associated with the direct ownership of real estate. The value of securities of REITs can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements and the management skill and creditworthiness of the issuer. In addition, the value of a REIT can depend on the structure and cash flow generated by the REIT and REITs may not have diversified holdings. Because REITs are pooled investment vehicles that have expenses of their own, the Fund will indirectly bear its proportionate share of those expenses.&lt;br /&gt;&lt;b&gt;Credit Risk. &lt;/b&gt;Credit risk is the risk that the issuer of a debt security will fail to repay principal and interest on the security when due. Credit risk is affected by the issuer&amp;#8217;s credit status, and is generally higher for non-investment grade securities.&lt;br /&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Interest rate risk is the risk that a debt security&amp;#8217;s value will decline due to changes in market interest rates. Even though some interest-bearing securities offer a stable stream of income, their prices will fluctuate with changes in interest rates.&lt;br /&gt;&lt;b&gt;Non-Investment Grade Securities Risk.&lt;/b&gt; Non-investment grade securities (also known as &amp;#8220;high yield&amp;#8221; or &amp;#8220;junk bonds&amp;#8221;), those rated below investment grade by the primary rating agencies (e.g., below BB/Ba by S&amp;amp;P/Moody&amp;#8217;s) tend to have more volatile prices and increased price sensitivity to changing interest rates and adverse economic and business developments than investment grade securities. In addition, compared to investments in investment grade securities, investments in non-investment grade securities are subject to greater risk of loss due to default or decline in credit quality. There is a greater likelihood that adverse economic or company-specific events will make the issuer unable to make interest and/or principal payments, and more susceptible to negative market sentiment, leading to depressed prices and decreased liquidity.</rr:RiskNarrativeTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.4984</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.127</rr:AnnualReturn2004>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.1102</rr:AnnualReturn2005>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.1705</rr:AnnualReturn2006>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.3308</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.3301</rr:AverageAnnualReturnYear01>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional comparison index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.216</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_13" unitRef="pure">0.1852</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_14" unitRef="pure">0.1748</rr:AverageAnnualReturnYear01>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.0223</rr:AnnualReturn2007>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">-0.2861</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.4929</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.4437</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.2976</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.0639</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">0.1185</rr:AnnualReturn2012>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" id="Item_15" unitRef="pure">0.0072</rr:ExpensesOverAssets>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;WASATCH STRATEGIC INCOME FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="INF" unitRef="USD">106</rr:ExpenseExampleYear01>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="INF" unitRef="USD">373</rr:ExpenseExampleYear03>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">-0.0202</rr:AnnualReturn2007>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="INF" unitRef="USD">660</rr:ExpenseExampleYear05>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="INF" unitRef="USD">1477</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">-0.4057</rr:AnnualReturn2008>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberC000002499_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.0352</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.0348</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.03</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_16" unitRef="pure">-0.0039</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_17" unitRef="pure">-0.007</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.1332</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.1268</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.1183</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_18" unitRef="pure">0.1316</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_19" unitRef="pure">0.1204</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.3804</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.1987</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0635</rr:AnnualReturn2011>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0022</rr:OtherExpensesOverAssets>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.1129</rr:AnnualReturn2012>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;21.21%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-28.22%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.1129</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0758</rr:AverageAnnualReturnYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.1073</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.16</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0422</rr:AverageAnnualReturnYear01>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.2121</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">-0.2822</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.6136</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.2631</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">-0.0887</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0308</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0205</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0204</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.255</rr:AnnualReturn2012>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.0166</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0595</rr:AverageAnnualReturnYear05>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchLong/ShortFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="INF" unitRef="USD">74</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="INF" unitRef="USD">231</rr:ExpenseExampleYear03>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.255</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.234</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0278</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.1934</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0169</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberMsciAllCountryAcWorldSmallCapIndex_Member" decimals="4" id="Item_20" unitRef="pure">0.1806</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberSAndPGlobalSmallCapIndex_Member" decimals="4" unitRef="pure">0.1908</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0219</rr:AverageAnnualReturnYear01>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="INF" unitRef="USD">401</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0422</rr:AverageAnnualReturnYear01>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="INF" unitRef="USD">896</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.2607</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.1128</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.2464</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.095</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0892</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.2283</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberMsciAllCountryAcWorldSmallCapIndex_Member" decimals="4" id="Item_21" unitRef="pure">0.2034</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0595</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberSAndPGlobalSmallCapIndex_Member" decimals="4" unitRef="pure">0.1944</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0874</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.071</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000882_MemberC000002500_Member" decimals="4" unitRef="pure">0.0672</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0518</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member">2008-11-17</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000022592_MemberC000065330_Member">2008-11-17</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000022592_MemberC000065330_Member">2008-11-17</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberSAndPGlobalSmallCapIndex_Member">2008-11-17</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberMsciAllCountryAcWorldSmallCapIndex_Member" id="Item_22">2008-11-17</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member" id="Item_23">&lt;b&gt;Best and Worst Quarterly Returns*&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;41.88%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 9/30/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-28.61%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0.3273</rr:BarChartHighestQuarterlyReturn>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">-0.1894</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatch-HoisingtonU.S.TreasuryFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatch-HoisingtonU.S.TreasuryFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.2775</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.2766</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.1816</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsSmallCapIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_24" unitRef="pure">0.2222</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_25" unitRef="pure">0.1822</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0771</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0765</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0665</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsSmallCapIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_26" unitRef="pure">0.0021</rr:AverageAnnualReturnYear05>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_27" unitRef="pure">-0.0092</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0696</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0688</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0.0599</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsSmallCapIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_28" unitRef="pure">-0.0005</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" decimals="4" id="Item_29" unitRef="pure">-0.0019</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.3846</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2165</rr:AnnualReturn2004>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member">2007-10-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000018772_MemberC000051938_Member">2007-10-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000018772_MemberC000051938_Member">2007-10-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsSmallCapIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" id="Item_30">2007-10-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberMsciEmergingMarketsIndexReflectsNoDeductionsForFeesExpensesOrTaxes_Member" id="Item_31">2007-10-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0326</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0668</rr:AnnualReturn2006>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.064</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.4434</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.4516</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2499</rr:AnnualReturn2010>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;&lt;br/&gt; The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableClosingTextBlock>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0509</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1919</rr:AnnualReturn2012>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchLong/ShortFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchLong/ShortFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchLong/ShortFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000035891_MemberC000110019_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;WASATCH GLOBAL OPPORTUNITIES FUND &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchCoreGrowthFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInvestorClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInvestorClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchCoreGrowthFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchCoreGrowthFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchCoreGrowthFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchCoreGrowthFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchEmergingMarketsSmallCapFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchLong/ShortFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0151</rr:ExpensesOverAssets>
  <rr:OtherExpensesNewFundBasedOnEstimates contextRef="Duration_01Feb2012_31Jan2013S000035891_Member">Other Expenses are based on estimated expenses for the Fund&amp;#8217;s first full fiscal year.</rr:OtherExpensesNewFundBasedOnEstimates>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;WASATCH LARGE CAP VALUE FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0453</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0273</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009843_MemberC000027264_Member" decimals="4" unitRef="pure">0.0284</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberSAndP500Index_Member" decimals="4" unitRef="pure">0.0378</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberBarclaysCapitalUsAggregateBondIndex_Member" decimals="4" unitRef="pure">0.0593</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;27.44%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;  &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt; &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-31.16%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1248</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.1635</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.1459</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0407</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.0349</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0828</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0972</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInvestorClass_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.098</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;WASATCH SMALL CAP GROWTH FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;56.10%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-32.16%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0024</rr:OtherExpensesOverAssets>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009843_MemberC000027264_Member">2006-02-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009843_MemberC000027264_Member">2006-02-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member">2006-02-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" id="Item_32" unitRef="pure">0.0126</rr:ExpensesOverAssets>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;WASATCH WORLD INNOVATORS FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="INF" unitRef="USD">128</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="INF" unitRef="USD">399</rr:ExpenseExampleYear03>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="INF" unitRef="USD">691</rr:ExpenseExampleYear05>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000882_MemberC000002500_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="INF" unitRef="USD">1522</rr:ExpenseExampleYear10>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 20% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatch-HoisingtonU.S.TreasuryFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;The Fund invests primarily in small growth companies.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in the equity securities of small companies with market capitalizations of less than $2.5 billion at the time of purchase.&lt;br/&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation.&lt;br/&gt;Within the Fund&amp;#8217;s portfolio, we seek to create a blend of &amp;#8220;core&amp;#8221; companies that we believe have the potential to grow steadily over long periods of time at faster rates than average large companies, and &amp;#8220;high growth&amp;#8221; companies that we believe have the potential to grow faster and more aggressively than core companies.&lt;br/&gt;We use a &amp;#8220;bottom up&amp;#8221; process of fundamental analysis to look for individual companies that we believe have superior growth prospects. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including information technology, industrials, consumer discretionary, health care, energy and financials.&lt;br/&gt;The Fund may invest in initial public offerings (IPOs).</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0195</rr:ManagementFeesOverAssets>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">&lt;b&gt;A secondary objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectiveSecondaryTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatch-HoisingtonU.S.TreasuryFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0036</rr:OtherExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0001</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" id="Item_33" unitRef="pure">0.0232</rr:ExpensesOverAssets>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">-0.0006</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0226</rr:NetExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.015</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchGlobalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0035</rr:OtherExpensesOverAssets>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchMicroCapFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" id="Item_34" unitRef="pure">0.0187</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="INF" unitRef="USD">229</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="INF" unitRef="USD">719</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="INF" unitRef="USD">1235</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="INF" unitRef="USD">2651</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchGlobalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt;&lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="INF" unitRef="USD">190</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="INF" unitRef="USD">588</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="INF" unitRef="USD">1012</rr:ExpenseExampleYear05>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="INF" unitRef="USD">2193</rr:ExpenseExampleYear10>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000883_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchInternationalGrowthFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 66% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000882_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatch-HoisingtonU.S.TreasuryFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.3743</rr:AnnualReturn2003>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.1336</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0514</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.084</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0836</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">-0.4166</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.4874</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.2892</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">-0.0006</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.1695</rr:AnnualReturn2012>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;The Fund invests primarily in domestic and foreign growth companies that we believe are innovators in their respective sectors or industries.&lt;/b&gt;&lt;br/&gt;Typically, the Fund&amp;#8217;s assets will be invested in at least three developed countries including the U.S. The Fund may invest in securities issued by companies domiciled in emerging markets without limitation. Under normal market conditions, a significant portion of the Fund&amp;#8217;s assets (typically between 40% and 80% at the time of purchase) will be invested outside the U.S.&lt;br/&gt;We will use a process of &amp;#8220;bottom up&amp;#8221; fundamental analysis to invest in companies of any size. However, because innovative companies are rapidly evolving, we expect to invest a significant portion of the Fund&amp;#8217;s assets in early stage companies and small to mid-size companies with market capitalizations of less than US $5 billion at the time of purchase.&lt;br/&gt;We have defined two broad categories that we believe are critical to identifying companies with outstanding investment potential. The first is companies that possess valuable intellectual property. The second is companies that are innovators in their respective sectors or industries.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including information technology, health care, consumer discretionary, industrials and financials.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;25.79%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-22.04%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchGlobalOpportunitiesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;INVESTMENT OBJECTIVES &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objectives are to seek capital appreciation and income. &lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline. The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics).&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt;&lt;b&gt;Technology and Science Stock Risk.&lt;/b&gt; Stocks of science and information technology companies may be volatile because issuers are sensitive to rapid obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. Information technology stocks, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Science companies may be affected by the same risks as technology companies.&lt;br/&gt;&lt;b&gt;Health Care Stock Risk.&lt;/b&gt; Health care companies are strongly affected by worldwide scientific or technological developments. Their products may rapidly become obsolete. Many health care companies are also subject to significant government regulation and may be affected by changes in government policies.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;EXAMPLE &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;PORTFOLIO TURNOVER &lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 14% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.1695</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.1579</rr:AverageAnnualReturnYear01>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.1254</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.1459</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.1635</rr:AverageAnnualReturnYear01>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;The Fund invests primarily in equity securities.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in equity securities (including common stock, preferred stock and securities convertible into common stock) of companies with market capitalizations of over $5 billion at the time of purchase. &lt;br /&gt;The Fund typically invests in the securities of companies that we believe will pay above average dividends or interest. &lt;br /&gt;When evaluating a potential investment for the Fund, we employ a comprehensive valuation analysis intended to establish a range for fair valuation or intrinsic company value, with a particular emphasis on company fundamentals. The initial valuation review may include:&lt;ul type="square"&gt;&lt;li&gt;Calculating and reviewing standard ratios, such as price-to-sales, price-to-book, price-to-earnings, and price/earnings-to-growth.&lt;/li&gt;&lt;li&gt;Modified discounted cash flow models with sensitivity analysis for changes to revenue growth rates, operating margins, outstanding share counts, earnings multiples, and tangible book value.&lt;/li&gt;&lt;li&gt;Changing sector and company specific outlooks due to subjective factors, including globalization of capital, labor and process knowledge, as well as increasing information and price transparency.&lt;/li&gt;&lt;/ul&gt;The Fund may invest a large percentage of its assets in a few sectors, including energy, financials, information technology, consumer staples, health care and industrials.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Value Investing Risk. &lt;/b&gt;Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0551</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0516</rr:AverageAnnualReturnYear05>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0473</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.0349</rr:AverageAnnualReturnYear05>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The Fund commenced operations on December 15, 2008 upon the reorganization of the 1st Source Monogram Income Equity Fund, the Fund&amp;#8217;s predecessor fund (the &amp;#8220;Predecessor Fund&amp;#8221;), into the Fund. With the reorganization, the Fund assumed the financial and performance history of the Predecessor Fund. The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based market index. Past performance, before and after taxes, is not necessarily an indication of how the Investor Class of the Fund will perform in the future. In addition, the Predecessor Fund was advised by a different investment advisor and subject to different expenses, which may have produced different investment results. The Fund, however, has two portfolio managers, one of which was also the portfolio manager of the Predecessor Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;WASATCH LARGE CAP VALUE FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;15.78%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-19.38%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchGlobalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0966</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0893</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.0846</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.098</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0972</rr:AverageAnnualReturnYear10>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.16</rr:BarChartHighestQuarterlyReturn>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000885_MemberC000002503_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.1594</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com. Effective April 1, 2011, the Wasatch World Innovators Fund changed its name from the Wasatch Global Science &amp;amp; Technology Fund and changed its principal strategies and primary comparison benchmark index. The bar chart, best and worst quarterly returns and average annual total return table include performance prior to these changes.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.221</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.2034</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.1667</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.1975</rr:AverageAnnualReturnYear01>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.034</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0307</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0289</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.0146</rr:AverageAnnualReturnYear05>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000887_Member" decimals="4" unitRef="pure">0.2</rr:PortfolioTurnoverRate>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.1066</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0903</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0874</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberRussellMicrocapIndex_Member" decimals="4" unitRef="pure">0.0573</rr:AverageAnnualReturnSinceInception>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.4804</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">-0.0405</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1643</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1595</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1317</rr:AnnualReturn2007>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">-0.5275</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.6748</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.2446</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0453</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1804</rr:AnnualReturn2012>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberC000027264_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;WASATCH WORLD INNOVATORS FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchGlobalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;28.94%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-30.07%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.2894</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">-0.3007</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000009843_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">0.2579</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">-0.2204</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1804</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1804</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1172</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberMsciAllCountryCWorldInvestableMarketsIndex_Member" decimals="4" id="Item_35" unitRef="pure">0.1638</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0398</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0397</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0341</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberMsciAllCountryCWorldInvestableMarketsIndex_Member" decimals="4" id="Item_36" unitRef="pure">-0.0073</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.1018</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0986</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000880_MemberC000002498_Member" decimals="4" unitRef="pure">0.0898</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberMsciAllCountryCWorldInvestableMarketsIndex_Member" decimals="4" id="Item_37" unitRef="pure">0.086</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;WASATCH INTERNATIONAL OPPORTUNITIES FUND  &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;WASATCH MICRO CAP VALUE FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 41% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 78% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;The Fund invests primarily in micro cap companies.&lt;/b&gt;&lt;br/&gt; Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in the equity securities of micro cap companies with market capitalizations of less than $1 billion at the time of purchase. &lt;br/&gt; The Fund may invest up to 30% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation. &lt;br/&gt; The Fund may invest in initial public offerings (IPOs).&lt;br/&gt; While the Fund primarily invests in value companies, it may also invest in growth companies if the Advisor believes that current valuation is at a sufficient discount to the projected long term earnings growth rate. &lt;br/&gt; We use a &amp;#8220;bottom up&amp;#8221; process of fundamental analysis to look for individual companies that we believe are temporarily undervalued but have significant potential for stock price appreciation. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br/&gt; We typically look for companies that we believe fall into one of these three categories at the time of purchase:&lt;ul type="square"&gt;&lt;li&gt;&lt;b&gt;Undiscovered Gems&lt;/b&gt; &amp;#8212; Companies with good growth potential which have yet to be broadly discovered by Wall Street analysts, thus leaving them attractively undervalued relative to their expected growth.&lt;/li&gt;&lt;li&gt;&lt;b&gt;Fallen Angels&lt;/b&gt; &amp;#8212; High quality growth companies that have experienced a temporary setback and therefore have appealing valuations relative to their long term growth potential.&lt;/li&gt;&lt;li&gt;&lt;b&gt;Value Momentum&lt;/b&gt; &amp;#8212; Cheap valuation relative to history, but catalyst for future growth has been identified.&lt;/li&gt;&lt;li&gt;The Fund may invest a large percentage of its assets in a few sectors, including financials, information technology, consumer discretionary, industrials, health care and materials.&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000880_Member" decimals="4" unitRef="pure">0.66</rr:PortfolioTurnoverRate>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000884_Member" decimals="4" unitRef="pure">0.41</rr:PortfolioTurnoverRate>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">After tax-returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0195</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0053</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" id="Item_38" unitRef="pure">0.0248</rr:ExpensesOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchSmallCapGrowthFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">-0.0023</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0225</rr:NetExpensesOverAssets>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchSmallCapGrowthFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br/&gt; The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Stock Market Risk. &lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt; &lt;b&gt;Stock Selection Risk. &lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt; &lt;b&gt;Foreign Securities&lt;/b&gt; &lt;b&gt;Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt; &lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt; &lt;b&gt;Micro Cap Company Stock Risk. &lt;/b&gt; Micro cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt; &lt;b&gt;Value Investing Risk. &lt;/b&gt; Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic value may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br/&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="INF" unitRef="USD">228</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="INF" unitRef="USD">751</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="INF" unitRef="USD">1300</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchSmallCapGrowthFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="INF" unitRef="USD">2799</rr:ExpenseExampleYear10>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchSmallCapGrowthFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.4435</rr:BarChartHighestQuarterlyReturn>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchSmallCapGrowthFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">-0.276</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;WASATCH MICRO CAP VALUE FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt; Year by Year Total Returns &lt;/b&gt;</rr:BarChartHeading>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.315</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.1517</rr:AnnualReturn2007>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000022592_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;32.73%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 9/30/11&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-18.94%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">-0.5473</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.7505</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.261</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">-0.1601</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.3179</rr:AnnualReturn2012>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.2124</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0909</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.2883</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.0702</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">-0.472</rr:AnnualReturn2008>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000887_MemberC000002505_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.704</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.2009</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">-0.1041</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.221</rr:AnnualReturn2012>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000887_Member">&lt;b&gt;WASATCH SMALL CAP GROWTH FUND  &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Year by Year Total Returns &lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;The Fund invests primarily in foreign micro cap companies.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest the Fund&amp;#8217;s assets in equity securities of foreign companies with market capitalizations of less than US$1 billion at the time of purchase. Under normal market conditions, the Fund will invest in at least five of the countries included in the Morgan Stanley Capital International (MSCI) All Country (AC) World Ex-U.S.A. Small Cap Index.&lt;br/&gt;The Fund may invest a significant amount of its total assets (20% to 70% under normal market conditions) at the time of purchase in securities issued by companies domiciled in emerging markets. Emerging market countries are those currently included in the MSCI EFM (Emerging Frontier Markets) Index. These companies typically are located in the Asia-Pacific region, Eastern Europe, the Middle East, Central and South America, and Africa.&lt;br/&gt;We travel extensively outside of the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies that we believe have above average revenue and earnings growth potential. We may invest in early stage companies if we believe they have outstanding long-term growth potential.&lt;br/&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including industrials, consumer discretionary, information technology, materials, consumer staples, energy, financials and health care.&lt;br/&gt;The Fund may also invest in initial public offerings (IPOs).</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br/&gt; The Fund is subject to the following principal investment risks: &lt;br/&gt; &lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market. &lt;br/&gt; &lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline. &lt;br/&gt; &lt;b&gt;Foreign Securities&lt;/b&gt; &lt;b&gt;Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates. &lt;br/&gt; &lt;b&gt;Emerging and Frontier Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging and frontier market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies. &lt;br/&gt; &lt;b&gt;Micro Cap Company Stock Risk. &lt;/b&gt;Micro cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price. &lt;br/&gt; &lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies. &lt;br/&gt; &lt;b&gt;Growth Stock Risk. &lt;/b&gt;Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets. &lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors. &lt;br/&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.</rr:RiskNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;44.35%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 9/30/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-27.60%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000886_MemberC000002504_Member">2003-07-28</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member">2003-07-28</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000886_MemberC000002504_Member">2003-07-28</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.3179</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.3179</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.2067</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_39" unitRef="pure">0.1852</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_40" unitRef="pure">0.1748</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0204</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0149</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0159</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_41" unitRef="pure">-0.0039</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_42" unitRef="pure">-0.007</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.092</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0809</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0.0774</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciAcWorldExUSSmallCapIndex_Member" decimals="4" id="Item_43" unitRef="pure">0.0676</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciWorldExUSSmallCapIndex_Member" decimals="4" id="Item_44" unitRef="pure">0.05</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchMicroCapValueFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000884_MemberC000002502_Member">2005-01-27</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000884_MemberC000002502_Member">2005-01-27</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member">2005-01-27</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000886_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;40.00%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-26.67%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">0.4</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberC000002504_Member" decimals="4" unitRef="pure">-0.2667</rr:BarChartLowestQuarterlyReturn>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH LARGE CAP VALUE FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Institutional Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 14% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.14</rr:PortfolioTurnoverRate>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">This example is intended to help you compare the cost of investing in the Institutional Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Institutional Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Institutional Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;The Fund invests primarily in equity securities. &lt;/b&gt;&lt;br /&gt; Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in equity securities (including common stock, preferred stock and securities convertible into common stocks) of companies with market capitalizations of over $5 billion at the time of purchase. &lt;br /&gt; The Fund typically invests in the securities of companies that we believe will pay above average dividends or interest. &lt;br /&gt; When evaluating a potential investment for the Fund, we employ a comprehensive valuation analysis intended to establish a range for fair valuation or intrinsic company value, with a particular emphasis on company fundamentals. The initial valuation review may include: &lt;ul&gt;&lt;li&gt; Calculating and reviewing standard ratios such as price-to-sales, price-to-book, price-to-earnings, and price/earnings-to-growth.&lt;/li&gt; &lt;li&gt; Modified discounted cash flow models with sensitivity analysis for changes to revenue growth rates, operating margins, outstanding share counts, earnings multiples, and tangible book value.&lt;/li&gt; &lt;li&gt; Changing sector and company specific outlooks due to subjective factors, including globalization of capital, labor and process knowledge, as well as increasing information and price transparency.&lt;/li&gt;&lt;/ul&gt; The Fund may invest a large percentage of its assets in a few sectors, including energy, financials, information technology, consumer staples, health care and industrials.</rr:StrategyNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based market index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">Past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH LARGE CAP VALUE FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;15.78%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp; &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-19.38%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212 (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1578</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.1938</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2985</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1701</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0994</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2002</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1236</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.3114</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2437</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1111</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0392</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1055</rr:AnnualReturn2012>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0041</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" id="Item_45" unitRef="pure">0.0131</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchInternationalOpportunitiesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0098</rr:NetExpensesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">100</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">383</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">687</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000110018_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">1550</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;WASATCH INTERNATIONAL OPPORTUNITIES FUND &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Year by Year Total Returns &lt;/b&gt;</rr:BarChartHeading>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0025</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" id="Item_46" unitRef="pure">0.0115</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.011</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="INF" unitRef="USD">112</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="INF" unitRef="USD">360</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="INF" unitRef="USD">627</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="INF" unitRef="USD">1393</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1055</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1017</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0735</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_MemberRussellThousandValueIndex_Member" decimals="4" unitRef="pure">0.1751</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0022</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.0018</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0002</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_MemberRussellThousandValueIndex_Member" decimals="4" unitRef="pure">0.0059</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0858</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0764</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0723</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_MemberRussellThousandValueIndex_Member" decimals="4" unitRef="pure">0.0738</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH CORE GROWTH FUND &amp;#8212; Summary</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Institutional Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;EXAMPLE &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">This example is intended to help you compare the cost of investing in the Institutional Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Institutional Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Institutional Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;PORTFOLIO TURNOVER &lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 28% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;The Fund invests primarily in smaller growing companies at reasonable prices. &lt;/b&gt;&lt;br /&gt;Under normal market conditions, we will invest at least 65% of the Fund&amp;#8217;s net assets in the equity securities of growing companies. These companies are usually small to mid-size with market capitalizations of less than $5 billion at the time of purchase. &lt;br /&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation. &lt;br /&gt;We focus on companies that we consider to be high quality. We use a process of &amp;#8220;bottom-up&amp;#8221; fundamental analysis to look for individual companies that we believe are stable and have the potential to grow steadily for long periods of time. Our analysis may include studying a company&amp;#8217;s financial statements, building proprietary financial models, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br /&gt;The Fund seeks to purchase stocks at prices we believe are reasonable relative to our projection of a company&amp;#8217;s long term earnings growth rate. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including industrials, financials, consumer discretionary, information technology and health care.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Smaller Company Stock Risk. &lt;/b&gt;Small and mid cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br /&gt;&lt;b&gt;Growth Stock Risk. &lt;/b&gt;Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Financials Sector Risk. &lt;/b&gt;The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The following tables provide information on how the Fund has performed over time. The Fund&amp;#8217;s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;&lt;/sup&gt;. The table below is designed to help you evaluate your risk tolerance by showing the Fund&amp;#8217;s best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index, and an additional index composed of securities similar to those held by the Fund. The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH CORE GROWTH FUND &amp;#8212; INVESTOR CLASS &lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;29.50%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-27.03%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000886_Member" decimals="4" unitRef="pure">0.78</rr:PortfolioTurnoverRate>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.28</rr:PortfolioTurnoverRate>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The following tables provide information on how the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The Fund&amp;#8217;s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.295</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.2703</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2985</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1701</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0994</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2002</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1236</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.3114</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2437</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1111</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.0392</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1055</rr:AnnualReturn2012>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.3846</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2165</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0326</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0668</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.064</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.4434</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.4516</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2499</rr:AnnualReturn2010>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.14</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based market index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0509</rr:AnnualReturn2011>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">Past performance, before and after taxes, is not necessarily an indication of how the Investor Class of the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1919</rr:AnnualReturn2012>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;WASATCH ULTRA GROWTH FUND &amp;#8212; Summary&lt;b/&gt;</rr:RiskReturnHeading>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1578</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.1938</rr:BarChartLowestQuarterlyReturn>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;The Fund&amp;#8217;s primary investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;WASATCH-1ST SOURCE INCOME FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is to seek current income consistent with the preservation of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The Fund&amp;#8217;s Investor Class shares commenced operations on December 15, 2008 upon the reorganization of the 1st Source Monogram Income Equity Fund, the Fund&amp;#8217;s predecessor fund (the &amp;#8220;Predecessor Fund&amp;#8221;), into the Fund. With the reorganization, the Fund assumed the financial and performance history of the Predecessor Fund. The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based market index. Past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. In addition, the Predecessor Fund was advised by a different investment advisor and subject to different expenses, which may have produced different investment results. The Fund, however, has two portfolio managers, one of which was also the portfolio manager of the Predecessor Fund. The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000880_MemberC000002498_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0055</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" id="Item_47" unitRef="pure">0.0155</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0043</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0112</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchLargeCapValueFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0015</rr:OtherExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0001</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0032</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">114</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">447</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">803</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">1809</rr:ExpenseExampleYear10>
  <rr:AcquiredFundFeesAndExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchLargeCapValueFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchCoreGrowthFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" id="Item_48" unitRef="pure">0.0071</rr:ExpensesOverAssets>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH EMERGING MARKETS SELECT FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchWorldInnovatorsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital. &lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1919</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1919</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1248</rr:AverageAnnualReturnYear01>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1635</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandGrowthIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1459</rr:AverageAnnualReturnYear01>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" id="Item_49" unitRef="pure">0.0152</rr:ExpensesOverAssets>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0471</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0407</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandGrowthIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0349</rr:AverageAnnualReturnYear05>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">This example is intended to help you compare the cost of investing in the Institutional Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the Fund&amp;#8217;s operating expenses (as a percentage of net assets) remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.088</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0828</rr:AverageAnnualReturnYear10>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;The Fund invests primarily in companies of all market capitalizations that are tied economically to emerging market countries.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s assets in the equity securities (including common stock, preferred stock and securities convertible into common stock) of companies that are tied economically to emerging market countries. &lt;br/&gt;Emerging market countries are those currently included in the Morgan Stanley Capital International (MSCI) Emerging Markets Index. We will generally consider qualifying investments to be in companies that are listed on an exchange in an emerging market country, that have at least 50% of their assets in an emerging market country, or that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services performed in an emerging market country. &lt;br/&gt;We travel extensively outside the U.S. to visit companies and expect to meet with senior management. We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis with the goal of owning the highest quality growth companies tied economically to emerging market countries. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, supplies and customers. &lt;br/&gt;We do not use allocation models to restrict the Fund&amp;#8217;s investments to certain regions, countries or industries. &lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors. &lt;br/&gt;The Fund may invest in initial public offerings (IPOs) and early stage companies. &lt;br/&gt;The Fund is non-diversified, meaning that it can concentrate investments in a more limited number of issuers than a diversified fund. Under normal market conditions, the Fund will generally invest in 30 to 50 companies; however, we may invest in fewer or more companies when we believe it is necessary to achieve the Fund&amp;#8217;s investment objective.</rr:StrategyNarrativeTextBlock>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0972</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberRussellTwoThousandGrowthIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.098</rr:AverageAnnualReturnYear10>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br /&gt;&lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br /&gt;&lt;b&gt;Convertible Securities Risk.&lt;/b&gt; Generally, convertible securities offer lower interest or dividend yields than non-convertible securities of similar quality and less potential for gains or capital appreciation in a rising stock market than other equity securities. They tend to be more volatile than other fixed income securities, and the markets for convertible securities may be less liquid than the markets for common stocks or bonds. The value of convertible securities is susceptible to the risk of market losses attributable to changes in interest rates. An issuer may have the right to buy back certain convertible securities at a time and price that is unfavorable to the Fund.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br /&gt;&lt;b&gt;Early Stage Companies Risk.&lt;/b&gt; Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br /&gt;&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; Because the Fund is non-diversified and generally invests in 30 to 50 companies, the Fund will have more exposure to the price movements of a single security or a small group of securities than funds that diversify their investments among many companies. The Fund&amp;#8217;s total return and net asset value could fluctuate more than if a greater number of securities were held.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Institutional Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Emerging Markets Select Fund has only recently commenced operations and does not have a full calendar year of performance.</rr:PerformanceNarrativeTextBlock>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchCoreGrowthFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchWorldInnovatorsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:OtherExpensesNewFundBasedOnEstimates contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">Other Expenses are based on estimated expenses for the Fund for its first full fiscal year.</rr:OtherExpensesNewFundBasedOnEstimates>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="INF" unitRef="USD">155</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="INF" unitRef="USD">481</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="INF" unitRef="USD">831</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="INF" unitRef="USD">1817</rr:ExpenseExampleYear10>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="INF" unitRef="USD">73</rr:ExpenseExampleYear01>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="INF" unitRef="USD">228</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="INF" unitRef="USD">396</rr:ExpenseExampleYear05>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; Because the Fund is non-diversified and generally invests in 30 to 50 companies, the Fund will have more exposure to the price movements of a single security or a small group of securities than funds that diversify their investments among many companies. The Fund&amp;#8217;s total return and net asset value could fluctuate more than if a greater number of securities were held.</rr:RiskNondiversifiedStatus>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 43% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="INF" unitRef="USD">884</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchWorldInnovatorsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchCoreGrowthFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchWorldInnovatorsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000879_Member" decimals="4" unitRef="pure">0.43</rr:PortfolioTurnoverRate>
  <rr:PerformanceOneYearOrLess contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">Ordinarily, this section of the prospectus contains information that would allow you to evaluate the performance of the Fund&amp;#8217;s Institutional Class using several different measures such as yearly changes in performance, best and worst quarterly returns and average annual total returns before and after taxes compared to a relevant benchmark. However, the Wasatch Emerging Markets Select Fund has only recently commenced operations and does not have a full calendar year of performance.</rr:PerformanceOneYearOrLess>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000880_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchWorldInnovatorsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 48% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchCoreGrowthFundInstitutionalClassBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0125</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" id="Item_50" unitRef="pure">0.0104</rr:OtherExpensesOverAssets>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000024178_Member" decimals="4" unitRef="pure">0.48</rr:PortfolioTurnoverRate>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0481</rr:AverageAnnualReturnYear05>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" id="Item_51" unitRef="pure">0.0229</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000002495_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0958</rr:AverageAnnualReturnYear10>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0079</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.015</rr:NetExpensesOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchEmergingMarketsSelectFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberC000110016_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;The Fund invests primarily in smaller high growth companies. &lt;/b&gt;&lt;br/&gt; Under normal market conditions, we will invest the Fund&amp;#8217;s assets in the equity securities of rapidly growing companies. These companies are usually small to mid-size with market capitalizations of less than $5 billion at the time of purchase.&lt;br/&gt; The Fund may invest up to 30% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation.&lt;br/&gt; We use a process of &amp;#8220;bottom up&amp;#8221; fundamental analysis to look for individual companies that we believe have above average potential for rapid earnings growth and stock price appreciation. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, suppliers and customers.&lt;br/&gt; The Fund may invest a large percentage of its assets in a few sectors, including information technology, financials, health care, consumer discretionary and industrials.&lt;br/&gt; The Fund may invest in initial public offerings (IPOs).</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">153</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberC000119726_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">640</rr:ExpenseExampleYear03>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchEmergingMarketsSelectFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchCoreGrowthFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt; The Fund is subject to the following principal investment risks:&lt;br/&gt; &lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt; &lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt; &lt;b&gt;Foreign Securities&lt;/b&gt; &lt;b&gt;Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt; &lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt; &lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt; &lt;b&gt;Growth Stock Risk.&lt;/b&gt; Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br/&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br/&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br/&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk.&lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038937_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchEmergingMarketsSelectFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">www.WasatchFunds.com.</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;WASATCH ULTRA GROWTH FUND &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;The Fund normally invests at least 65% of its total assets in debt securities of all types, including corporate bonds, U.S. government bonds, and variable and floating rate securities.&lt;/b&gt;&lt;br/&gt;Consistent with the Wasatch-1st Source Income Fund&amp;#8217;s (Income Fund) investment objective, 1st Source Corporation Investment Advisors, Inc. (1st Source), the Fund&amp;#8217;s Sub-Advisor, expects the Fund to:&lt;ul type="square"&gt;&lt;li&gt;Invest substantially all, but in no event less than 65%, of the Fund&amp;#8217;s total assets at the time of purchase in debt securities.&lt;/li&gt;&lt;li&gt;Invest in fixed income securities consisting of bonds, fixed income preferred stocks, debentures, notes, zero-coupon securities, mortgage-related and other asset-backed securities, state, municipal or industrial revenue bonds, obligations issued or guaranteed by agencies or instrumentalities of the U.S. government, debt securities convertible into or exchangeable for common stocks, foreign debt securities, income participation loans, guaranteed investment contracts, first mortgage loans and participation certificates in pools of mortgages issued or guaranteed by agencies or instrumentalities of the U.S. government.&lt;/li&gt;&lt;li&gt;Typically invest in debt securities rated at the time of purchase within the four highest rating categories assigned by one or more nationally recognized statistical rating organizations (NRSROs) or, if unrated, those which 1st Source deems to be of comparable quality. The Fund may also invest up to 10% of its total assets in non-investment grade debt securities.&lt;/li&gt;&lt;/ul&gt;The Fund may engage in repurchase transactions, credit default swaps, forward contracts, and may also engage in futures transactions solely for hedging purposes and invest in options on futures. The Fund may also invest in other investment companies.&lt;br/&gt;The Fund may purchase securities on a when-issued or delayed delivery basis, in which a security&amp;#8217;s price and yield are fixed on a specific date, but payment and delivery are scheduled for a future date beyond the standard settlement period.&lt;br/&gt;It is anticipated that the Fund will have an average maturity of 3&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt; 1&lt;/sup&gt;/&lt;sub style="POSITION: relative; VERTICAL-ALIGN: baseline; TOP: 0.1ex"&gt;2&lt;/sub&gt; years to 5 years and a duration of 2&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt; 1&lt;/sup&gt;/&lt;sub style="POSITION: relative; VERTICAL-ALIGN: baseline; TOP: 0.1ex"&gt;2&lt;/sub&gt; years to 4&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt; 1&lt;/sup&gt;/&lt;sub style="POSITION: relative; VERTICAL-ALIGN: baseline; TOP: 0.1ex"&gt;2&lt;/sub&gt; years.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.4452</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.0082</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0358</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0731</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.1511</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.554</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.5501</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.3585</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.0537</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.1245</rr:AnnualReturn2012>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/03&lt;/td&gt;&lt;td valign="bottom"&gt;  &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt; &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;29.29%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;  &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;  &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt; &lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-31.56%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;  &lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;  The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt; Interest rate risk is the risk that a debt security&amp;#8217;s value will decline due to changes in market interest rates. Even though some interest-bearing securities offer a stable stream of income, their prices will fluctuate with changes in interest rates.&lt;br/&gt;&lt;b&gt;Credit Risk. &lt;/b&gt; Credit risk is the risk that the issuer of a debt security will fail to repay principal and interest on the security when due. Credit risk is affected by the issuer&amp;#8217;s credit status, and is generally higher for non-investment grade securities.&lt;br/&gt; &lt;b&gt;Income Risk.&lt;/b&gt; Income risk is the potential for a decline in the Fund&amp;#8217;s income due to falling interest rates.&lt;br/&gt;&lt;b&gt;Non-Investment Grade Securities Risk.&lt;/b&gt; Non-investment grade securities (also known as &amp;#8220;high yield&amp;#8221; or &amp;#8220;junk bonds&amp;#8221;), those rated below investment grade by the primary rating agencies (e.g., below BB/Ba by S&amp;amp;P/Moody&amp;#8217;s), tend to have more volatile prices and increased price sensitivity to changing interest rates and adverse economic and business developments than investment grade securities. In addition, compared to investments in investment grade securities, investments in non-investment grade securities are subject to greater risk of loss due to default or decline in credit quality. There is a greater likelihood that adverse economic or company-specific events will make the issuer unable to make interest and/or principal payments, and more susceptible to negative market sentiment, leading to depressed prices and decreased liquidity.&lt;br/&gt;&lt;b&gt;Convertible Securities Risk. &lt;/b&gt;The Fund may invest in convertible securities. Convertible securities are preferred stocks or debt obligations that are convertible into common stock. Generally, convertible securities offer lower interest or dividend yields than non-convertible securities of similar quality, and less potential for gains or capital appreciation in a rising stock market than other equity securities. They tend to be more volatile than other fixed income securities, and the markets for convertible securities may be less liquid than the markets for common stocks or bonds. Convertible securities have both equity and fixed income risk characteristics. Like all fixed income securities, the value of convertible securities is susceptible to the risk of market losses attributable to changes in interest rates. The market value of convertible securities tends to decline as interest rates increase. If, however, the market price of the common stock underlying a convertible security approaches or exceeds the conversion price of the convertible security, the convertible security tends to reflect the market price of the underlying common stock. In such a case, a convertible security may lose much or all of its value if the value of the underlying common stock then falls below the conversion price of the security. As the market price of the underlying common stock declines, the convertible security tends to trade increasingly based on its fixed income characteristics, and thus, may not necessarily decline in price as much as the underlying common stock. Additionally, an issuer may have the right to buy back a convertible security at a time and price that is unfavorable to the Fund.&lt;br/&gt;&lt;b&gt;Ratings Agency Risk. &lt;/b&gt; Credit quality in the high yield securities market can change suddenly and unexpectedly, and even recently issued credit ratings may not fully reflect the actual risks posed by a particular high yield security. For these reasons, it is generally the policy of 1st Source not to rely exclusively on ratings issued by established NRSROs, but to supplement such ratings with its own independent and ongoing review of credit quality. The achievement of the Fund&amp;#8217;s investment objective by investments in such securities may be more dependent on 1st Source&amp;#8217;s credit analysis than is the case for higher quality bonds. Should the rating of a portfolio security be downgraded, 1st Source will determine whether it is in the best interests of the Fund to retain or dispose of such security.&lt;br/&gt;&lt;b&gt;Repurchase Agreements Risk. &lt;/b&gt; The main risk of a repurchase agreement is that the original seller might default on its obligation to repurchase the securities. If the seller defaults, the Fund will seek to recover its investment by selling the collateral and could encounter restrictions, costs or delays. The Fund will suffer a loss if it sells the collateral for less than the repurchase price.&lt;br/&gt;&lt;b&gt;When-Issued Securities Risk. &lt;/b&gt; The Fund may purchase securities on a &amp;#8220;when-issued&amp;#8221; basis (i.e., for delivery beyond the normal settlement date at a stated price and yield). When the Fund engages in &amp;#8220;when-issued&amp;#8221; transactions, it relies on the seller to consummate the trade. Failure of the seller to do so may result in the Fund&amp;#8217;s incurring a loss or missing the opportunity to obtain a price considered to be advantageous. The Fund will engage in &amp;#8220;when-issued&amp;#8221; delivery transactions only for the purpose of acquiring portfolio securities consistent with the Fund&amp;#8217;s investment objective and strategies and not for investment leverage.&lt;br/&gt;&lt;b&gt;Investment Companies Risk. &lt;/b&gt; The Fund may invest in shares of other investment companies, including foreign and domestic registered and unregistered open-end funds, closed-end funds, and unit investment trusts and exchange traded funds. Investing in another investment company subjects the Fund to the same risks associated with investing in the securities held by the applicable investment company and the investment strategies employed by such funds (such as the use of leverage). In addition, the benefit of investing in another investment company is largely dependent on the skill of the investment advisor of the underlying company and whether the associated fees and costs involved with investing in such company are offset by the potential gains. As a shareholder in an investment company, the Fund will bear its ratable share of that investment company&amp;#8217;s expenses including advisory and administrative fees. Shareholders would therefore be subject to duplicative expenses to the extent that the Fund invests in other investment companies.&lt;br/&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt; The Fund may suffer a loss from its use of put and call options and futures contracts, which are forms of derivatives. Derivatives can amplify a gain or loss, potentially earning or losing substantially more money than the actual cost of the derivative instrument, with the potential for unlimited losses on certain instruments. Derivatives may be difficult to value, may become illiquid, and may affect the timing and character of taxes payable by shareholders.&lt;br/&gt;&lt;b&gt;Credit Default Swaps Risk. &lt;/b&gt; The Fund may enter into credit default swaps, interest rate swaps and currency swaps. Swap agreements will tend to shift a Fund&amp;#8217;s investment exposure from one type of investment to another. Depending on how they are used, swap agreements may increase or decrease the overall volatility of the Fund&amp;#8217;s portfolio and its share price and yield. Swaps are subject to counterparty risk. The Fund bears the loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. For this reason, the Fund will enter into swap agreements only with counterparties that meet certain standards of creditworthiness.&lt;br/&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt; The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.</rr:RiskNarrativeTextBlock>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.2929</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.3156</rr:BarChartLowestQuarterlyReturn>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;HISTORICAL PERFORMANCE &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The Fund commenced operations on December 15, 2008 upon the reorganization of the 1st Source Monogram Income Fund, the Fund&amp;#146;s predecessor fund (the &amp;#147;Predecessor Fund&amp;#148;), into the Fund. With the reorganization, the Fund assumed the financial and performance history of the Predecessor Fund. The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in bar chart. The average annual total returns table allows you to compare the Fund&amp;#146;s (and Predecessor Fund&amp;#146;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based bond market index. Past performance, before and after taxes, is not necessarily an indication of how the Investor Class of the Fund will perform in the future. In addition, the Predecessor Fund was advised by a different investment advisor and subject to different expenses, which may have produced different investment results. The portfolio manager of the Fund, however, was also the portfolio manager of the Predecessor Fund. Performance information is updated regularly and is available on the Fund&amp;#146;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">Past performance, before and after taxes, is not necessarily an indication of how the Investor Class of the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008). The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#146;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in bar chart. The average annual total returns table allows you to compare the Fund&amp;#146;s (and Predecessor Fund&amp;#146;s for periods prior to December 15, 2008) performance over the time periods indicated to that of a broad-based bond market index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000018772_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.1245</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.1016</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.111</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.1459</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.0001</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.0059</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">-0.0003</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.0349</rr:AverageAnnualReturnYear05>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;WASATCH-1ST SOURCE INCOME FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0625</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0521</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000879_MemberC000002497_Member" decimals="4" unitRef="pure">0.0529</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000879_MemberRussellTwoThousandGrowthIndexes_Member" decimals="4" unitRef="pure">0.098</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1055</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1017</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0735</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberRussellThousandValueIndexReflectsNoDeductionsForFeesExpensesOrTaxes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1751</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0022</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0002</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0018</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberRussellThousandValueIndexReflectsNoDeductionsForFeesExpensesOrTaxes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0059</rr:AverageAnnualReturnYear05>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0764</rr:AverageAnnualReturnYear10>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member">2006-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0723</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberRussellThousandValueIndexReflectsNoDeductionsForFeesExpensesOrTaxes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0738</rr:AverageAnnualReturnYear10>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0285</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">-0.022</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0243</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0181</rr:AnnualReturn2004>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberRussellMidcapGrowthIndex_Member">2004-06-18</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000881_MemberSAndP500Index_Member">2004-06-18</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0101</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0372</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0561</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0354</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0598</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0422</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0386</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0281</rr:AnnualReturn2012>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberC000070970_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0858</rr:AverageAnnualReturnYear10>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 9/30/06&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;2.85%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 6/30/04&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-2.20%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberCitigroupThreeMonthUsTreasuryBillsIndex_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInvestorClass_MemberSAndP500Index_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000886_MemberRussellMicrocapIndex_Member">2003-07-28</rr:AverageAnnualReturnInceptionDate>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#146;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#146;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The Fund&amp;#146;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0408</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0307</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.029</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberBarclaysCapitalUSIntermediateGovernmentCreditBondIndex_Member" decimals="4" unitRef="pure">0.0518</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0349</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0225</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0224</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberBarclaysCapitalUSIntermediateGovernmentCreditBondIndex_Member" decimals="4" unitRef="pure">0.0462</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0281</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0215</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024178_MemberC000070969_Member" decimals="4" unitRef="pure">0.0184</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024178_MemberBarclaysCapitalUSIntermediateGovernmentCreditBondIndex_Member" decimals="4" unitRef="pure">0.0389</rr:AverageAnnualReturnYear01>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciAcWorldExUSSmallCapIndex_Member" id="Item_52">2005-01-27</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberMsciWorldExUSSmallCapIndex_Member" id="Item_53">2005-01-27</rr:AverageAnnualReturnInceptionDate>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt; The Fund is subject to the following principal investment risks:&lt;br /&gt; &lt;b&gt;Stock Market Risk. &lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt; &lt;b&gt;Stock Selection Risk. &lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt; &lt;b&gt;Value Investing Risk. &lt;/b&gt; Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br /&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt; &lt;b&gt;Financials Sector Risk. &lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objectives are to seek capital appreciation and income. &lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatch-1stSourceIncomeFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatch-1stSourceIncomeFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchUltraGrowthFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatch-1stSourceIncomeFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchUltraGrowthFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchUltraGrowthFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchUltraGrowthFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatch-1stSourceIncomeFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchUltraGrowthFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchLargeCapValueFundInstitutionalClassBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_54" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_55" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">117</rr:ExpenseExampleYear01>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_56" unitRef="pure">0.0066</rr:OtherExpensesOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchLargeCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1652</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1652</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1074</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.1805</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1635</rr:AverageAnnualReturnYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">473</rr:ExpenseExampleYear03>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_57" unitRef="pure">0.0166</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">853</rr:ExpenseExampleYear05>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_58" unitRef="pure">-0.0051</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">1922</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0246</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0246</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0211</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.0355</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatch-1stSourceIncomeFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberRussellTwoThousandIndexes_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0972</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.095</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0796</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0805</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0949</rr:AverageAnnualReturnYear10>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchLargeCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchLargeCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000000879_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000110017_MemberInstitutionalClass_Member" decimals="4" id="Item_59" unitRef="pure">0.0115</rr:NetExpensesOverAssets>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH LONG/SHORT FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is capital appreciation.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:OtherExpensesNewFundBasedOnEstimates contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">Other Expenses for Institutional Class shares are estimated based on actual expenses for the Investor Class shares of the Fund during the most recent fiscal year.</rr:OtherExpensesNewFundBasedOnEstimates>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberSAndP500Index_Member">2006-02-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000009843_MemberBarclaysCapitalUsAggregateBondIndex_Member">2006-02-01</rr:AverageAnnualReturnInceptionDate>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">This example is intended to help you compare the cost of investing in the Institutional Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Institutional Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the Fund&amp;#8217;s operating expenses (as a percentage of net assets) remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 71% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.71</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;The Fund invests primarily in equity securities by maintaining long equity positions and short equity positions. &lt;/b&gt;&lt;br /&gt;We seek to achieve higher risk-adjusted returns with lower volatility compared to the equity markets in general (as represented by the S&amp;amp;P 500 Index). Under normal market conditions, we will invest the Fund&amp;#8217;s assets in the equity securities of companies with market capitalizations of at least $100 million at the time of purchase that we have identified as being undervalued (long equity positions) and we will sell short those securities (short equity positions) that we have identified as being overvalued. The equity securities in which the Fund invests include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, warrants and any rights to purchase common stocks. &lt;br /&gt;The Fund may at any time have either a net long exposure or a net short exposure to the equity markets and the Fund will not be managed to maintain either net long or net short market exposure. &lt;br /&gt;The Fund may invest in early stage companies and initial public offerings (IPOs). &lt;br /&gt;We believe that the best opportunities to make both short and long equity investments are when the market&amp;#8217;s perception of the values of individual companies (measured by the stock price) differs widely from our assessment of the intrinsic values of such companies. We further believe that opportunities to invest in undervalued and overvalued stocks arise due to a variety of market inefficiencies including: &lt;br /&gt;&lt;ul type="square"&gt;&lt;li&gt;Changes in market participant psychology and circumstances.&lt;/li&gt;&lt;li&gt;Imperfect information.&lt;/li&gt;&lt;li&gt;Forecasts and projections by Wall Street analysts and company representatives that differ from experienced reality.&lt;br/&gt;When evaluating a potential long or short investment for the Fund, we employ a comprehensive valuation analysis intended to establish a range for fair valuation or intrinsic company value, with particular emphasis on company fundamentals.&lt;br/&gt;Along with long positions, the Long/Short Fund intends to engage in short sales of securities of companies that we believe:&lt;/li&gt;&lt;li&gt;Have earnings that appear to be reflected in the current price.&lt;/li&gt;&lt;li&gt;Are likely to fall short of market expectations.&lt;/li&gt;&lt;li&gt;Are in industries exhibiting weaknesses.&lt;/li&gt;&lt;li&gt;Have poor management.&lt;/li&gt;&lt;li&gt;Are likely to suffer an event affecting long-term earnings.&lt;br /&gt;The Fund may invest in fixed income securities of any maturity consisting of corporate notes, bonds and debentures, including those that are rated less than investment grade at the time of purchase. &lt;br /&gt;The Fund is non-diversified, meaning that it can concentrate investments in a more limited number of issuers than a diversified fund. &lt;br /&gt;The Fund may invest a large percentage of its assets in a few sectors, including information technology, financials, energy, consumer discretionary, materials, industrials and consumer staples. &lt;br /&gt;The Fund is expected to have a high portfolio turnover rate.&lt;/li&gt;&lt;/ul&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH SMALL CAP VALUE FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Market Direction Risk. &lt;/b&gt;Since the Fund has both a &amp;#8220;long&amp;#8221; and a &amp;#8220;short&amp;#8221; portfolio, an investment in the Fund will involve market risks associated with different types of investment decisions than those made for a typical &amp;#8220;long only&amp;#8221; stock fund. The Fund&amp;#8217;s results will suffer both when there is a general stock market advance and the Fund holds significant &amp;#8220;short&amp;#8221; equity positions, or when there is a general stock market decline and the Fund holds significant &amp;#8220;long&amp;#8221; equity positions.&lt;br /&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Short Sales Risk. &lt;/b&gt;The Fund may make short sales of securities, which means it may experience a loss if the market price of the security increases between the date of the short sale and the date the security is replaced. Short sales may reduce the Fund&amp;#8217;s returns or increase volatility.&lt;br /&gt;&lt;b&gt;Small Company Stock Risk. &lt;/b&gt;Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br /&gt;&lt;b&gt;Early Stage Companies Risk. &lt;/b&gt;Early stage companies may never obtain necessary financing, may rely on untested business plans, may not be successful in developing markets for their products or services, and may remain an insignificant part of their industry, and as such may never be profitable. Stocks of early stage companies may be illiquid, privately traded, and more volatile and speculative than the securities of larger companies.&lt;br /&gt;&lt;b&gt;Initial Public Offerings (IPOs) Risk. &lt;/b&gt;IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br /&gt;&lt;b&gt;Non-Diversification Risk. &lt;/b&gt;The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.&lt;br /&gt;&lt;b&gt;Value Investing Risk. &lt;/b&gt;Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br /&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Interest rate risk is the risk that a debt security&amp;#8217;s value will decline due to changes in market interest rates. Even though some interest-bearing securities offer a stable stream of income, their prices will fluctuate with changes in interest rates.&lt;br /&gt;&lt;b&gt;Credit Risk. &lt;/b&gt;Credit risk is the risk that the issuer of a debt security will fail to repay principal and interest on the security when due. Credit risk is affected by the issuer&amp;#8217;s credit status, and is generally higher for non-investment grade securities.&lt;br /&gt;&lt;b&gt;Non-Investment Grade Securities Risk. &lt;/b&gt;Non-investment grade securities (also known as &amp;#8220;junk bonds&amp;#8221;), those rated below investment grade by the primary rating agencies (e.g., below BB/Ba by S&amp;amp;P/Moody&amp;#8217;s), tend to have more volatile prices and increased price sensitivity to changing interest rates and adverse economic and business developments than investment grade securities. In addition, compared to investments in investment grade securities, investments in non-investment grade securities are subject to greater risk of loss due to default or decline in credit quality. There is a greater likelihood that adverse economic or company-specific events will make the issuer unable to make interest and/or principal payments, and more susceptible to negative market sentiment, leading to depressed prices and decreased liquidity.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk. &lt;/b&gt;Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Energy Sector Risk. &lt;/b&gt;The value of energy companies is particularly vulnerable to developments in the energy sector, fluctuations in price and supply of energy fuels, energy conservation, supply of and demand for specific energy-related products or services, and tax policy and other government regulation.&lt;br /&gt;&lt;b&gt;Financials Sector Risk. &lt;/b&gt;The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br /&gt;&lt;b&gt;Information Technology Risk. &lt;/b&gt;Stocks of information technology companies may be volatile because issuers are sensitive to rapid obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. Information technology stocks, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market.&lt;br /&gt;&lt;b&gt;Portfolio Turnover Rate. &lt;/b&gt;The Fund&amp;#8217;s portfolio turnover rate is expected to exceed 200%. This type of Fund has a high portfolio turnover that necessarily results in greater transaction costs and causes more short-term capital gains (or losses) to be realized. Distributions to shareholders of short-term capital gains are taxed as ordinary income under federal income tax laws.</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The Fund&amp;#8217;s Investor Class shares commenced operations on December 15, 2008, upon the reorganization of the 1st Source Monogram Long/Short Fund, the Fund&amp;#8217;s predecessor fund (the &amp;#8220;Predecessor Fund&amp;#8221;), into the Fund. With the reorganization, the Fund assumed the financial and performance history of the Predecessor Fund. The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008) as represented by the Fund&amp;#8217;s Investor Class. &lt;b&gt;Institutional Class shares are new and do not have any performance history.&lt;/b&gt; The annual returns in the bar chart, the best and worst quarterly returns and the Average Annual Total Returns table below are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year-to-year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance, as represented by the Fund&amp;#8217;s Investor Class, over the time periods indicated to that of a broad-based securities market index composed of securities similar to those held by the Fund and an additional index. Past performance, before and after taxes, is not necessarily an indication of how the Institutional Class of the Fund will perform in the future. In addition, the Predecessor Fund was advised by a different investment advisor and subject to different expenses, which may have produced different investment results. The portfolio managers of the Fund, however, were also the portfolio managers of the Predecessor Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com</rr:PerformanceNarrativeTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital. &lt;/b&gt;Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Institutional Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;Non-Diversification Risk. &lt;/b&gt;The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNondiversifiedStatus>
  <rr:ExpensesRestatedToReflectCurrent contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The Fund&amp;#8217;s operating expenses have been restated to reflect a reduction in the management fee, effective January 31, 2012, as if such changes had been in effect during the fiscal year ended September 30, 2012. The information has been restated to better reflect anticipated expenses of the Fund.</rr:ExpensesRestatedToReflectCurrent>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The following tables provide an indication of the historical risk of an investment in the Fund (and Predecessor Fund for periods prior to December 15, 2008) as represented by the Fund&amp;#8217;s Investor Class. &lt;b&gt;Institutional Class shares are new and do not have any performance history.&lt;/b&gt; The annual returns in the bar chart, the best and worst quarterly returns and the Average Annual Total Returns table below are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year-to-year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance for the years shown in the bar chart. The average annual total returns table allows you to compare the Fund&amp;#8217;s (and Predecessor Fund&amp;#8217;s for periods prior to December 15, 2008) performance, as represented by the Fund&amp;#8217;s Investor Class, over the time periods indicated to that of a broad-based securities market index composed of securities similar to those held by the Fund and an additional index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">This example is intended to help you compare the cost of investing in the Institutional Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Institutional Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Institutional Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">Past performance, before and after taxes, is not necessarily an indication of how the Institutional Class of the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 55% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.55</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt;The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk. &lt;/b&gt;The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk. &lt;/b&gt;The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Small Company Stock Risk. &lt;/b&gt;Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br /&gt;&lt;b&gt;Value Investing Risk. &lt;/b&gt;Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br /&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors.&lt;br /&gt;&lt;b&gt;Financials Sector Risk. &lt;/b&gt;The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH LONG/SHORT FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0447</rr:AnnualReturn2004>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0382</rr:AnnualReturn2005>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term growth of capital.&lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1472</rr:AnnualReturn2006>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The following tables provide information on how the Fund has performed over time. The Fund&amp;#8217;s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the Fund&amp;#8217;s best and worst quarterly performance for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The following tables provide information on how the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0498</rr:AnnualReturn2007>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000018772_MemberC000051938_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.2093</rr:AnnualReturn2008>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The Fund&amp;#8217;s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.3007</rr:AnnualReturn2009>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;WASATCH SMALL CAP VALUE FUND &amp;#8212; INVESTOR CLASS&lt;br/&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0941</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0177</rr:AnnualReturn2011>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0867</rr:AnnualReturn2012>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.5457</rr:AnnualReturn2003>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;16.00%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-15.94%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2158</rr:AnnualReturn2004>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0476</rr:AnnualReturn2005>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.16</rr:BarChartHighestQuarterlyReturn>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1484</rr:AnnualReturn2006>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.03</rr:AnnualReturn2007>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.1594</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.4775</rr:AnnualReturn2008>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.5591</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.2552</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0522</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.1652</rr:AnnualReturn2012>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;33.91%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-34.04%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.3391</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.3404</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="INF" unitRef="USD">131</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="INF" unitRef="USD">408</rr:ExpenseExampleYear03>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;b&gt;The Fund invests primarily in small companies.&lt;br/&gt;&lt;/b&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in the equity securities of small companies with market capitalizations of less than $2.5 billion at the time of purchase. &lt;br /&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation. &lt;br /&gt;The Fund may also invest in growth companies if the Advisor believes that current valuation is at a sufficient discount to the projected long-term earnings growth rate. &lt;br /&gt;We use a &amp;#8220;bottom-up&amp;#8221; process of fundamental analysis to look for individual companies that we believe are temporarily undervalued but have significant potential for stock price appreciation. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, suppliers and customers. &lt;br /&gt;We typically look for companies that we believe fall into one of these three categories at the time of purchase:&lt;ul type="square"&gt;&lt;li&gt;&lt;b&gt;Undiscovered Gems&lt;/b&gt; &amp;#8212; Companies with good growth potential which have yet to be broadly discovered by Wall Street analysts, thus leaving them attractively undervalued relative to their expected growth.&lt;/li&gt;&lt;li&gt;&lt;b&gt;Fallen Angels&lt;/b&gt; &amp;#8212; High quality growth companies that have experienced a temporary setback and therefore have appealing valuations relative to their long term growth potential.&lt;/li&gt;&lt;li&gt;&lt;b&gt;Quality Value&lt;/b&gt; &amp;#8212; Quality companies with earnings potential that is not fully reflected in their stock prices.&lt;/li&gt;&lt;/ul&gt;The Fund may invest a large percentage of its assets in a few sectors, including industrials, information technology, financials, consumer discretionary, health care and energy.</rr:StrategyNarrativeTextBlock>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="INF" unitRef="USD">707</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="INF" unitRef="USD">1556</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchLargeCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). Higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 55% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees contextRef="Duration_01Feb2012_31Jan2013S000024178_Member">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&amp;#8217;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</rr:ExpensesNotCorrelatedToRatioDueToAcquiredFundFees>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">144</rr:ExpenseExampleYear01>
  <rr:Component3OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" id="Item_60" unitRef="pure">0.0024</rr:Component3OtherExpensesOverAssets>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">453</rr:ExpenseExampleYear03>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" id="Item_61" unitRef="pure">0.001</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">785</rr:ExpenseExampleYear05>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" id="Item_62" unitRef="pure">0.0144</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="INF" unitRef="USD">1723</rr:ExpenseExampleYear10>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">-0.0003</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000121224_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0141</rr:NetExpensesOverAssets>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;The Fund invests primarily in small companies.&lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s net assets in the equity securities of small companies with market capitalizations of less than $2.5 billion at the time of purchase.&lt;br/&gt;The Fund may invest up to 20% of its total assets at the time of purchase in securities issued by foreign companies in developed or emerging markets. Securities issued by companies incorporated outside the United States whose securities are publicly traded in the United States are not defined as foreign companies and are not subject to this limitation.&lt;br/&gt;The Fund may also invest in growth companies if the Advisor believes that current valuation is at a sufficient discount to the projected long-term earnings growth rate.&lt;br/&gt;We use a &amp;#8220;bottom-up&amp;#8221; process of fundamental analysis to look for individual companies that we believe are temporarily undervalued but have significant potential for stock price appreciation. Our analysis may include studying a company&amp;#8217;s financial statements, visiting company facilities, and meeting with executive management, suppliers and customers.&lt;br/&gt;We typically look for companies that we believe fall into one of these three categories at the time of purchase: &lt;ul type="square"&gt;&lt;li&gt;&lt;b&gt;Undiscovered Gems&lt;/b&gt; &amp;#8212; Companies with good growth potential which have yet to be broadly discovered by Wall Street analysts, thus leaving them attractively undervalued relative to their expected growth.&lt;/li&gt;&lt;li&gt; &lt;b&gt;Fallen Angels&lt;/b&gt; &amp;#8212; High quality growth companies that have experienced a temporary setback and therefore have appealing valuations relative to their long term growth potential.&lt;/li&gt;&lt;li&gt;&lt;b&gt;Quality Value&lt;/b&gt; &amp;#8212; Quality companies with earnings potential that is not fully reflected in their stock prices.&lt;/li&gt;&lt;/ul&gt;The Fund may invest a large percentage of its assets in a few sectors, including industrials, information technology, financials, consumer discretionary, health care and energy.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.&lt;br/&gt;The Fund is subject to the following principal investment risks:&lt;br/&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br/&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt; The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br/&gt;&lt;b&gt;Foreign Securities Risk.&lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br/&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br/&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns because the issuers often have narrow markets, fewer product lines, and limited managerial and financial resources, resulting in volatile stock prices and a limited ability to sell them at a desirable time or price.&lt;br/&gt;&lt;b&gt;Value Investing Risk.&lt;/b&gt; Value investing attempts to identify strong companies whose stocks are selling at a discount from their perceived true worth. It is subject to the risk that the stocks&amp;#8217; intrinsic values may never be fully recognized or realized by the market, their prices may go down, or that stocks judged to be undervalued may actually be appropriately priced.&lt;br/&gt;&lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors, it may have increased exposure to the price movements of those sectors.&lt;br/&gt;&lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The following tables provide information on how the Investor Class of the Fund has performed over time. The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing changes in the Fund&amp;#8217;s performance from year to year, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the years shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index and an additional index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0867</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0863</rr:AverageAnnualReturnYear01>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 6/30/09&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;33.91%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 12/31/08&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-34.04%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0569</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberSAndP500Index_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.16</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberCitigroupThreeMonthUsTreasuryBillsIndex_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0007</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0447</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0425</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.037</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberSAndP500Index_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0166</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberCitigroupThreeMonthUsTreasuryBillsIndex_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0045</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2003 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.5457</rr:AnnualReturn2003>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.06</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0523</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0476</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2004 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2158</rr:AnnualReturn2004>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberSAndP500Index_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.061</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberCitigroupThreeMonthUsTreasuryBillsIndex_MemberInstitutionalClass_Member" decimals="4" unitRef="pure">0.0172</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2005 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0476</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1484</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.03</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.4775</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.5591</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.2552</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.0522</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1652</rr:AnnualReturn2012>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchSmallCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1652</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1652</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.1074</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.1805</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.1635</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0246</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0246</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.0355</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0949</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0805</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0796</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandValueIndex_Member" decimals="4" unitRef="pure">0.095</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_MemberRussellTwoThousandIndexes_Member" decimals="4" unitRef="pure">0.0972</rr:AverageAnnualReturnYear10>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchLong/ShortFundInstitutionalClassBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000022592_MemberC000065330_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchLong/ShortFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000885_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchSmallCapValueFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchLong/ShortFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">After tax-returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableNarrativeTextBlock>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000884_MemberC000002502_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchSmallCapValueFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchSmallCapValueFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchSmallCapValueFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchSmallCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpensesRestatedToReflectCurrent contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The Fund&amp;#8217;s operating expenses have been restated to reflect a reduction in the management fee, effective January 31, 2012, as if such changes had been in effect during the fiscal year ended September 30, 2012. The information has been restated to better reflect anticipated expenses of the Fund.</rr:ExpensesRestatedToReflectCurrent>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchLong/ShortFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.55</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The following tables provide information on how the Investor Class of the Fund has performed over time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchLong/ShortFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_MemberInstitutionalClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000024180_MemberC000070971_MemberInstitutionalClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberSAndP500Index_MemberInstitutionalClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberCitigroupThreeMonthUsTreasuryBillsIndex_MemberInstitutionalClass_Member">2003-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.3391</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">-0.3404</rr:BarChartLowestQuarterlyReturn>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchSmallCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchSmallCapValueFundInstitutionalClass column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;WASATCH SMALL CAP VALUE FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000000884_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" id="Item_63" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" id="Item_64" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" id="Item_65" unitRef="pure">0.0029</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" id="Item_66" unitRef="pure">0.0129</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000000878_MemberC000002496_MemberInvestorClass_Member" decimals="4" unitRef="pure">0.0211</rr:AverageAnnualReturnYear05>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchSmallCapValueFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInvestorClass_Member">&lt;b&gt;WASATCH SMALL CAP VALUE FUND &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Year by Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberInstitutionalClass_Member">&lt;b&gt;Institutional Class shares are new and do not have any performance history.&lt;/b&gt; The annual returns in the bar chart, the best and worst quarterly returns and the Average Annual Total Returns table below are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000878_MemberInstitutionalClass_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchSmallCapValueFundInstitutionalClassBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:Component1OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000000883_MemberC000002501_Member" decimals="4" unitRef="pure">0.0001</rr:Component1OtherExpensesOverAssets>
  <rr:Component1OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013S000024180_MemberC000070971_Member" decimals="4" id="Item_67" unitRef="pure">0.0024</rr:Component1OtherExpensesOverAssets>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;WASATCH EMERGING INDIA FUND &amp;#8212; Summary&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;The Fund&amp;#8217;s investment objective is long-term appreciation of capital. &lt;/b&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The tables below describe the fees and expenses that you may pay if you buy, sell or hold Investor Class shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;SHAREHOLDER FEES (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;EXAMPLE&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">This example is intended to help you compare the cost of investing in the Investor Class of the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the Investor Class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that the operating expenses (as a percentage of net assets) of the Fund&amp;#8217;s Investor Class remained the same. The example reflects contractual fee waivers and reimbursements through January 31, 2014. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;PORTFOLIO TURNOVER&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 17% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;PRINCIPAL STRATEGIES&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;The Fund invests primarily in companies tied economically to India. &lt;/b&gt;&lt;br/&gt;Under normal market conditions, we will invest at least 80% of the Fund&amp;#8217;s assets in the equity securities (including common stock, preferred stock and securities convertible into common stock) of companies tied economically to India.&lt;br/&gt;We will generally consider qualifying investments to be in companies that are listed on an Indian exchange, that have at least 50% of their assets in India, or that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services performed in India. &lt;br/&gt;The Fund is expected to invest across market capitalization levels, ranging from small capitalization stocks to larger capitalization stocks. However, we expect the Fund to invest a significant portion of its assets in small to mid-size companies with market capitalizations of less than $5 billion at the time of purchase.&lt;br/&gt;We use a process of quantitative screening followed by &amp;#8220;bottom up&amp;#8221; fundamental analysis to identify individual companies that we believe have above average revenue and earnings growth potential.&lt;br/&gt;The Fund may invest a large percentage of its assets in a few sectors, including financials, consumer discretionary, industrials, consumer staples, materials and information technology.&lt;br/&gt;We may also invest in initial public offerings (IPOs).&lt;br/&gt;The Fund is non-diversified, meaning that it can concentrate investments in a more limited number of issuers than a diversified fund.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;PRINCIPAL RISKS&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund. &lt;br /&gt; The Fund is subject to the following principal investment risks:&lt;br /&gt;&lt;b&gt;Stock Market Risk.&lt;/b&gt; The Fund&amp;#8217;s investments may decline in value due to movements in the overall stock market.&lt;br /&gt;&lt;b&gt;Stock Selection Risk.&lt;/b&gt;  The Fund invests primarily in equity securities (including common stock, preferred stock and securities convertible into common stock, warrants and rights, and other securities with equity characteristics). The Fund&amp;#8217;s investments may decline in value even when the overall stock market is not in a general decline.&lt;br /&gt;&lt;b&gt;Foreign Securities Risk. &lt;/b&gt; Foreign securities are generally more volatile and less liquid than U.S. securities. Further, foreign securities may be subject to additional risks not associated with investment in U.S. securities due to differences in the economic and political environment, the amount of available public information, the degree of market regulation, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates.&lt;br /&gt; &lt;b&gt;Indian Market Risk.&lt;/b&gt; Government actions, bureaucratic obstacles and inconsistent economic and tax reform within the Indian government have had a significant effect on the economy and could adversely affect market conditions, deter economic growth and reduce the profitability of private enterprises. Global factors and foreign actions may inhibit the flow of foreign capital on which India is dependent to sustain its growth. Large portions of many Indian companies remain in the hands of their founders (including members of their families). Family-controlled companies may have weaker and less transparent corporate governance, which increases the potential for loss and unequal treatment of investors. India experiences many of the market risks associated with developing economies, including relatively low levels of liquidity, which may result in extreme volatility in the prices of Indian securities. Religious, cultural and military disputes persist in India, and between India and Pakistan (as well as sectarian groups within each country). The threat of aggression in the region could hinder development of the Indian economy, and escalating tensions could impact the broader region, including China. &lt;br /&gt; Because the Fund will concentrate its investments in a single region of the world, the value of the Fund&amp;#8217;s shares may be affected by events that adversely affect India and may fluctuate more than the value of a less concentrated fund&amp;#8217;s shares.&lt;br /&gt;&lt;b&gt;Emerging Markets Risk.&lt;/b&gt; In addition to the risks of investing in foreign securities in general, the risks of investing in the securities of companies domiciled in emerging market countries (such as India) include increased political or social instability, economies based on only a few industries, unstable currencies, runaway inflation, highly volatile securities markets, unpredictable shifts in policies relating to foreign investments, lack of protection for investors against parties that fail to complete transactions, and the potential for government seizure of assets or nationalization of companies.&lt;br /&gt;&lt;b&gt;Small Company Stock Risk.&lt;/b&gt; Small cap stocks may be very sensitive to changing economic conditions and market downturns.&lt;br /&gt; &lt;b&gt;Growth Stock Risk. &lt;/b&gt;Growth stock prices may be more sensitive to changes in current or expected earnings than the prices of other stocks, and they may fall or not appreciate in step with the broader securities markets.&lt;br /&gt; &lt;b&gt;Initial Public Offerings (IPOs) Risk. &lt;/b&gt; IPOs involve a higher degree of risk because companies involved in IPOs generally have limited operating histories and their prospects for future profitability are uncertain. Prices of IPOs may also be unstable due to the absence of a prior public market, the small number of shares available for trading and limited investor information.&lt;br /&gt; &lt;b&gt;Financials Sector Risk.&lt;/b&gt; The financials sector is subject to extensive government regulation, can be subject to relatively rapid change due to increasingly blurred distinctions between service segments, and can be significantly affected by the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, and price competition.&lt;br /&gt; &lt;b&gt;Sector Weightings Risk.&lt;/b&gt; Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect all the securities in a single sector. If the Fund invests in a few sectors it may have increased exposure to the price movements of those sectors.&lt;br /&gt; &lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;HISTORICAL PERFORMANCE&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The following tables provide information on how the Investor Class of the Fund has performed over the last calendar year and since inception. Past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future. The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing the Fund&amp;#8217;s performance, as represented by the Investor Class of the Fund. The table below is designed to help you evaluate your risk tolerance by showing the best and worst quarterly performance of the Fund&amp;#8217;s Investor Class for the calendar year shown in the bar chart. The average annual total return table below allows you to compare the Fund&amp;#8217;s performance over the time periods indicated to that of a broad-based market index composed of securities similar to those held by the Fund. Performance information is updated regularly and is available on the Fund&amp;#8217;s website www.WasatchFunds.com.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;WASATCH EMERGING INDIA FUND &amp;#8212; INVESTOR CLASS&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Calendar Year Total Return &lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;Average Annual Total Returns &amp;#8212; (as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor&amp;#8217;s tax situation and may differ from those shown. The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.&lt;br/&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:ObjectiveSecondaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">&lt;b&gt;Income is a secondary objective, but only when consistent with long-term growth of capital.&lt;/b&gt; Currently, we do not expect the Fund&amp;#8217;s investments to generate substantial income.</rr:ObjectiveSecondaryTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExchangeFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumAccountFeeOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0</rr:MaximumAccountFeeOverAssets>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_01Feb2012_31Jan2013S000000877_MemberInstitutionalClass_Member">The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:RedemptionFeeOverRedemption contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ManagementFeesOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.015</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.0191</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" id="Item_68" unitRef="pure">0.0341</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">-0.0146</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.0195</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="INF" unitRef="USD">198</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="INF" unitRef="USD">912</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="INF" unitRef="USD">1649</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="INF" unitRef="USD">3596</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.3377</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberInvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.3377</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberInvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.2195</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberMsciIndiaInvestableMarketIndex_Member" decimals="4" id="Item_69" unitRef="pure">0.2728</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberInvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.0197</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberInvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.0225</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.0234</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberMsciIndiaInvestableMarketIndex_Member" decimals="4" id="Item_70" unitRef="pure">-0.1114</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartReturnsForClassNotOfferedInProspectus contextRef="Duration_01Feb2012_31Jan2013S000024179_MemberInstitutionalClass_Member">The Fund&amp;#8217;s Institutional Class commenced operations on January 31, 2012. The calendar year returns in the bar chart, the best and worst quarterly returns and the average annual total returns table are based on the Fund&amp;#8217;s Investor Class shares. Investor Class shares are not offered in this Prospectus. Performance for Investor Class shares would be similar because the shares are invested in the same portfolio of securities and would differ only to the extent that Institutional Class shares have different expenses.</rr:BarChartReturnsForClassNotOfferedInProspectus>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member">2011-04-26</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberInvestorClass_MemberS000031426_MemberC000097757_Member">2011-04-26</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberInvestorClass_MemberS000031426_MemberC000097757_Member">2011-04-26</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberMsciIndiaInvestableMarketIndex_Member" id="Item_71">2011-04-26</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;Best and Worst Quarterly Returns&lt;/b&gt;&lt;table&gt;&lt;tr&gt;&lt;td width="72%"&gt;&lt;/td&gt;&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Best &amp;#151; 3/31/12&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;21.43%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="top"&gt;Worst &amp;#151; 6/30/12&lt;/td&gt;&lt;td valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" align="right"&gt;-6.95%&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom"&gt;&amp;nbsp;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member">Best</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member">2012-03-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.2143</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member">Worst</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member">2012-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">-0.0695</rr:BarChartLowestQuarterlyReturn>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member" decimals="4" unitRef="pure">0.17</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">All investments carry some degree of risk that will affect the value of the Fund, its investment performance and the price of its shares. As a result, you may lose money if you invest in the Fund.</rr:RiskLoseMoney>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The Fund can invest a larger portion of its assets in the stocks of a limited number of companies than a diversified fund, which means it may have more exposure to the price movements of a single security or small group of securities than funds that diversify their investments among many companies.</rr:RiskNondiversifiedStatus>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The following tables provide information on how the Investor Class of the Fund has performed over the last calendar year and since inception.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">Past performance, before and after taxes, of the Fund&amp;#8217;s Investor Class is not necessarily an indication of how these shares will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">www.WasatchFunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The after-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">The Fund&amp;#8217;s returns after taxes on distributions and sale of Fund shares may be higher than returns before taxes and after taxes on distributions because they include the effect of a tax benefit an investor may receive from the capital losses that would have been incurred.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleShareholderFeesWasatchEmergingIndiaFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleExpenseExampleTransposedWasatchEmergingIndiaFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedWasatchEmergingIndiaFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;b&gt;ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualFundOperatingExpensesWasatchEmergingIndiaFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:AnnualReturn2012 contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_MemberC000097757_Member" decimals="4" unitRef="pure">0.3377</rr:AnnualReturn2012>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013InvestorClass_MemberS000031426_Member">&lt;div style="display:none"&gt;~ http://www.wasatchfunds.com/role/ScheduleAnnualTotalReturnsWasatchEmergingIndiaFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <link:footnoteLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="#Item_3" xlink:label="ExpensesOverAssets" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets" xlink:label="footnote_ExpensesOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 0.95% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets" xlink:to="footnote_ExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_5" xlink:label="ExpensesOverAssets_2" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_2" xlink:label="footnote_ExpensesOverAssets_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.95% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_2" xlink:to="footnote_ExpensesOverAssets_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_68" xlink:label="Item_68_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_68_lbl" xlink:to="footnote_ExpensesOverAssets_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_2" xlink:label="OtherExpensesOverAssets" xlink:type="locator"/>
    <link:footnote id="footnote_OtherExpensesOverAssets" xlink:label="footnote_OtherExpensesOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Other Expenses are based on estimated expenses for the Investor Class of the Fund for its first full fiscal year. The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.69% (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses in excess of such limitations) until at least January 31, 2014. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="OtherExpensesOverAssets" xlink:to="footnote_OtherExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_4" xlink:label="Item_4_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_4_lbl" xlink:to="footnote_OtherExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_7" xlink:label="ExpensesOverAssets_3" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_3" xlink:label="footnote_ExpensesOverAssets_3" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.95% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). There were no reimbursements for the Investor Class shares of the Fund during 2012. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_3" xlink:to="footnote_ExpensesOverAssets_3" xlink:type="arc"/>
    <link:loc xlink:href="#Item_6" xlink:label="ExpensesOverAssets_4" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_4" xlink:label="footnote_ExpensesOverAssets_4" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.75% until at least January 31, 2014 (excluding interest, interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). There were no reimbursements for the Investor Class shares of the Fund during 2012. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_4" xlink:to="footnote_ExpensesOverAssets_4" xlink:type="arc"/>
    <link:loc xlink:href="#Item_46" xlink:label="ExpensesOverAssets_5" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_5" xlink:label="footnote_ExpensesOverAssets_5" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.10% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_5" xlink:to="footnote_ExpensesOverAssets_5" xlink:type="arc"/>
    <link:loc xlink:href="#Item_60" xlink:label="Component3OtherExpensesOverAssets" xlink:type="locator"/>
    <link:footnote id="footnote_Component3OtherExpensesOverAssets" xlink:label="footnote_Component3OtherExpensesOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Dividends on short sales are the dividends paid to the lenders of borrowed securities. The expenses related to dividends on short sales are estimated and will vary depending on whether the securities the Fund sells short pay dividends and on the amount of any such dividends. Expenses also include borrowing costs paid to the broker in connection with borrowing the security to be sold short. The rate paid by brokers varies by security.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Component3OtherExpensesOverAssets" xlink:to="footnote_Component3OtherExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_67" xlink:label="Item_67_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_67_lbl" xlink:to="footnote_Component3OtherExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_12" xlink:label="ExpensesOverAssets_6" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_6" xlink:label="footnote_ExpensesOverAssets_6" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 0.95% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs, and extraordinary expenses). Acquired Fund Fees and Expenses are not included in the expense limitation. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date. The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund's most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_6" xlink:to="footnote_ExpensesOverAssets_6" xlink:type="arc"/>
    <link:loc xlink:href="#Item_23" xlink:label="BarChartClosingTextBlock" xlink:type="locator"/>
    <link:footnote id="footnote_BarChartClosingTextBlock" xlink:label="footnote_BarChartClosingTextBlock" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Prior to January 31, 2007, the Fund primarily invested in companies with market capitalizations of less than US$2 billion at the time of purchase. </link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="BarChartClosingTextBlock" xlink:to="footnote_BarChartClosingTextBlock" xlink:type="arc"/>
    <link:loc xlink:href="#Item_13" xlink:label="AverageAnnualReturnYear01" xlink:type="locator"/>
    <link:footnote id="footnote_AverageAnnualReturnYear01" xlink:label="footnote_AverageAnnualReturnYear01" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: MSCI. MSCI makes no express or implied warranties or representations and shall have no liability whatsoever with respect to any MSCI data contained herein. The MSCI data may not be further redistributed or used to create indices or financial products. This report is not approved or produced by MSCI.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="AverageAnnualReturnYear01" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_14" xlink:label="Item_14_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_14_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_16" xlink:label="Item_16_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_16_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_17" xlink:label="Item_17_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_17_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_18" xlink:label="Item_18_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_18_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_19" xlink:label="Item_19_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_19_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_20" xlink:label="Item_20_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_20_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_21" xlink:label="Item_21_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_21_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_22" xlink:label="Item_22_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_22_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_24" xlink:label="Item_24_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_24_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_25" xlink:label="Item_25_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_25_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_26" xlink:label="Item_26_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_26_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_27" xlink:label="Item_27_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_27_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_28" xlink:label="Item_28_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_28_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_29" xlink:label="Item_29_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_29_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_30" xlink:label="Item_30_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_30_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_31" xlink:label="Item_31_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_31_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_35" xlink:label="Item_35_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_35_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_36" xlink:label="Item_36_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_36_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_37" xlink:label="Item_37_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_37_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_39" xlink:label="Item_39_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_39_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_40" xlink:label="Item_40_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_40_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_41" xlink:label="Item_41_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_41_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_42" xlink:label="Item_42_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_42_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_43" xlink:label="Item_43_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_43_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_44" xlink:label="Item_44_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_44_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_52" xlink:label="Item_52_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_52_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_53" xlink:label="Item_53_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_53_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_69" xlink:label="Item_69_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_69_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_70" xlink:label="Item_70_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_70_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_71" xlink:label="Item_71_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_71_lbl" xlink:to="footnote_AverageAnnualReturnYear01" xlink:type="arc"/>
    <link:loc xlink:href="#Item_11" xlink:label="ExpensesOverAssets_7" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_7" xlink:label="footnote_ExpensesOverAssets_7" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.50% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date. There were no reimbursements for the Investor Class shares of the Fund during 2012.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_7" xlink:to="footnote_ExpensesOverAssets_7" xlink:type="arc"/>
    <link:loc xlink:href="#Item_66" xlink:label="Item_66_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_66_lbl" xlink:to="footnote_ExpensesOverAssets_7" xlink:type="arc"/>
    <link:footnote id="footnote_ManagementFeesOverAssets" xlink:label="footnote_ManagementFeesOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Fund's operating expenses have been restated to reflect a reduction in the management fee, effective January 31, 2012, as if such changes had been in effect during the fiscal year ended September 30, 2012. The information has been restated to better reflect anticipated expenses of the Fund.</link:footnote>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_66_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_8" xlink:label="OtherExpensesOverAssets_2" xlink:type="locator"/>
    <link:footnote id="footnote_OtherExpensesOverAssets_2" xlink:label="footnote_OtherExpensesOverAssets_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Other Expenses are based on estimated expenses for the Fund's first full fiscal year. The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 2.25% (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses) until at least January 31, 2014. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="OtherExpensesOverAssets_2" xlink:to="footnote_OtherExpensesOverAssets_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_9" xlink:label="Item_9_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_9_lbl" xlink:to="footnote_OtherExpensesOverAssets_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_15" xlink:label="ExpensesOverAssets_8" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_8" xlink:label="footnote_ExpensesOverAssets_8" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 0.75% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). There were no reimbursements for the Investor Class shares of the Fund during 2012. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_8" xlink:to="footnote_ExpensesOverAssets_8" xlink:type="arc"/>
    <link:loc xlink:href="#Item_10" xlink:label="ExpensesOverAssets_9" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_9" xlink:label="footnote_ExpensesOverAssets_9" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 2.25% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). There were no reimbursements for the Investor Class shares of the Fund during 2012. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_9" xlink:to="footnote_ExpensesOverAssets_9" xlink:type="arc"/>
    <link:loc xlink:href="#Item_32" xlink:label="ExpensesOverAssets_10" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_10" xlink:label="footnote_ExpensesOverAssets_10" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.50% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). Acquired Fund Fees and Expenses are not included in the expense limitation. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date. There were no reimbursements for the Investor Class shares of the Fund during 2012. The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund's most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_10" xlink:to="footnote_ExpensesOverAssets_10" xlink:type="arc"/>
    <link:loc xlink:href="#Item_49" xlink:label="Item_49_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_49_lbl" xlink:to="footnote_ExpensesOverAssets_10" xlink:type="arc"/>
    <link:loc xlink:href="#Item_34" xlink:label="ExpensesOverAssets_11" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_11" xlink:label="footnote_ExpensesOverAssets_11" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.95% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). Acquired Fund Fees and Expenses are not included in the expense limitation. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date. There were no reimbursements for the Investor Class shares of the Fund during 2012. The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund&#x2019;s most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_11" xlink:to="footnote_ExpensesOverAssets_11" xlink:type="arc"/>
    <link:loc xlink:href="#Item_38" xlink:label="ExpensesOverAssets_12" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_12" xlink:label="footnote_ExpensesOverAssets_12" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 2.25% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_12" xlink:to="footnote_ExpensesOverAssets_12" xlink:type="arc"/>
    <link:loc xlink:href="#Item_33" xlink:label="ExpensesOverAssets_13" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_13" xlink:label="footnote_ExpensesOverAssets_13" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Investor Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 2.25% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). Acquired Fund Fees and Expenses are not included in the expense limitation. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date. The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund's most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_13" xlink:to="footnote_ExpensesOverAssets_13" xlink:type="arc"/>
    <link:loc xlink:href="#Item_47" xlink:label="ExpensesOverAssets_14" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_14" xlink:label="footnote_ExpensesOverAssets_14" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.12% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_14" xlink:to="footnote_ExpensesOverAssets_14" xlink:type="arc"/>
    <link:loc xlink:href="#Item_48" xlink:label="ExpensesOverAssets_15" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_15" xlink:label="footnote_ExpensesOverAssets_15" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Total Annual Fund Operating Expenses may not equal the expense ratio stated in the Fund's most recent Annual Report and Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_15" xlink:to="footnote_ExpensesOverAssets_15" xlink:type="arc"/>
    <link:loc xlink:href="#Item_50" xlink:label="OtherExpensesOverAssets_3" xlink:type="locator"/>
    <link:footnote id="footnote_OtherExpensesOverAssets_3" xlink:label="footnote_OtherExpensesOverAssets_3" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Other Expenses are based on estimated expenses for the Fund for its first full fiscal year. The Advisor has contractually agreed to reimburse the Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.50% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses in excess of such limitations). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="OtherExpensesOverAssets_3" xlink:to="footnote_OtherExpensesOverAssets_3" xlink:type="arc"/>
    <link:loc xlink:href="#Item_51" xlink:label="Item_51_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_51_lbl" xlink:to="footnote_OtherExpensesOverAssets_3" xlink:type="arc"/>
    <link:loc xlink:href="#Item_45" xlink:label="ExpensesOverAssets_16" xlink:type="locator"/>
    <link:footnote id="footnote_ExpensesOverAssets_16" xlink:label="footnote_ExpensesOverAssets_16" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 0.98% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ExpensesOverAssets_16" xlink:to="footnote_ExpensesOverAssets_16" xlink:type="arc"/>
    <link:loc xlink:href="#Item_54" xlink:label="ManagementFeesOverAssets" xlink:type="locator"/>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="ManagementFeesOverAssets" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_55" xlink:label="Item_55_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_55_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_56" xlink:label="Item_56_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_56_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_57" xlink:label="Item_57_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_57_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:footnote id="footnote_ExpensesOverAssets_2_2" xlink:label="footnote_ExpensesOverAssets_2_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The Advisor has contractually agreed to reimburse the Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.15% until at least January 31, 2014 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses). The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc order="2.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_57_lbl" xlink:to="footnote_ExpensesOverAssets_2_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_58" xlink:label="Item_58_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_58_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_59" xlink:label="Item_59_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_59_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_63" xlink:label="Item_63_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_63_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_64" xlink:label="Item_64_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_64_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_65" xlink:label="Item_65_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_65_lbl" xlink:to="footnote_ManagementFeesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_61" xlink:label="OtherExpensesOverAssets_4" xlink:type="locator"/>
    <link:footnote id="footnote_OtherExpensesOverAssets_4" xlink:label="footnote_OtherExpensesOverAssets_4" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Other Expenses for Institutional Class shares are estimated based on actual expenses for the Investor Class shares of the Fund during the most recent fiscal year. Wasatch Advisors, Inc., the Fund's investment advisor, has contractually agreed to reimburse the Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.17% (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs and extraordinary expenses) until at least January 31, 2014. The Advisor may rescind the contractual limitation on expenses at any time after its expiration date.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="OtherExpensesOverAssets_4" xlink:to="footnote_OtherExpensesOverAssets_4" xlink:type="arc"/>
    <link:loc xlink:href="#Item_62" xlink:label="Item_62_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_62_lbl" xlink:to="footnote_OtherExpensesOverAssets_4" xlink:type="arc"/>
  </link:footnoteLink>
</xbrl>
