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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName WASATCH FUNDS TRUST
Prospectus Date rr_ProspectusDate Jan. 31, 2020
Wasatch Global Value Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading WASATCH GLOBAL VALUE FUND® — SUMMARY
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVES
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund's investment objectives are to seek capital appreciation and income.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The tables below describe the fees and expenses that you may pay if you buy, sell or hold shares of the Fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT YOU PAY EACH YEAR AS A PERCENTAGE OF THE VALUE OF YOUR INVESTMENT)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 31, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). 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’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 49% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 49.00%
Expense Example [Heading] rr_ExpenseExampleHeading EXAMPLE
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invested $10,000 in the applicable 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 remained the same. This example reflects contractual fee waivers and reimbursements through January 31, 2021. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading PRINCIPAL STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Fund invests primarily in the equity securities of foreign and domestic companies.

Under normal market conditions, we will invest the Fund’s net assets primarily in the equity securities of foreign and domestic companies of all market capitalizations.

The Fund will typically invest in securities issued by companies domiciled in at least three countries, including the United States. The Fund will invest a significant portion of its total assets in companies domiciled in foreign countries (under normal market conditions, we expect at least 40% of its assets to be invested outside the United States, or if conditions are not favorable, 30% of its assets to be invested outside the United States). Securities issued by foreign companies incorporated outside the United States whose securities are principally traded in the United States are not defined as “foreign companies” and are not subject to this limitation.

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 and frontier markets, which are those countries 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.

The Fund may invest in the equity securities of companies of any size, although we expect a significant portion of the Fund’s assets to be invested in companies with market capitalizations of over US$5 billion at the time of purchase.

To achieve the Fund’s investment objectives, the Fund invests in securities that we believe are priced below their intrinsic long-term value based on our valuation analysis.

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:
  • Calculating and reviewing standard ratios, such as price-to-sales, price-to-book, price-to-earnings, and price/earnings-to-growth.
  • Discounted cash flow models with sensitivity analysis for changes to revenue growth rates, operating margins, outstanding share counts, earnings multiples, and tangible book value.
The Fund typically seeks to sell a security when the issuing company becomes overvalued relative to our analysis of its intrinsic long-term value.

The Fund may invest a significant amount of its assets in a particular region or market, including Asia, Europe, and the United Kingdom.

The Fund may invest a large percentage of its assets in a few sectors, including financials, health care, energy, consumer staples, utilities, communication services, information technology, real estate, and industrials.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The Fund may invest a large percentage of its assets in a few sectors, including financials, health care, energy, consumer staples, utilities, communication services, information technology, real estate, and industrials.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock 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. An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

The Fund is subject to the following principal investment risks:

Stock Market Risk. The Fund’s investments may decline in value due to movements in the overall stock market.

Stock Selection Risk. The investment techniques and risk analysis employed by the Advisor may not produce the desired results. This could cause the Fund to lose value even when the overall stock market is not in a general decline, or could cause the Fund’s investment results to lag its performance benchmark or other funds with similar benchmarks.

Equity Securities Risk. Equity securities represent ownership in a company. They may be traded (bought or sold) on a securities exchange or stock market. Stock markets are volatile. The price of equity securities will fluctuate and can decline and reduce the value of a portfolio investing in equity securities. The value of equity securities purchased by the Fund could decline if the financial condition of the companies in which the Fund invests declines or if overall market and economic conditions deteriorate. The value of equity securities may also decline due to factors that affect a particular industry or industries such as labor shortages, an increase in production costs and changes in competitive conditions within an industry. In addition, the value of equity securities may decline due to general market conditions not specifically related to a company or industry such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates, changes in government regulations, or generally adverse investor sentiment. Certain equity securities may be less liquid, meaning that they may be difficult to sell at a time or price that is desirable, than other types of securities, or they may be illiquid. Some securities exchanges or stock markets may also be less liquid or illiquid due to low trading volume.

Foreign Securities Risk. 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 investments in U.S. securities. Differences in the economic and political environment, the amount of available public information, the amount of taxation, limitations on the use or transfer of Fund assets, the degree of market regulation, settlement practices, the potential for permanent or temporary termination of trading, and financial reporting, accounting and auditing standards, and, in the case of foreign currency-denominated securities, fluctuations in currency exchange rates, can have a significant effect on the value of a foreign security. Additionally, certain countries may utilize formal or informal currency-exchange controls or “capital controls.” Capital controls may impose restrictions on the Fund’s ability to repatriate investments or income. Such capital controls can also have a significant effect on the value of the Fund’s holdings.

Emerging Markets Risk. 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 and less liquid 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 or other government interference in which case the Fund could lose all or a significant portion of its investment in that country.

Frontier Markets Risk. In addition to the risks of investing in foreign securities in developed 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 or larger emerging markets. These risks can result in the potential for extreme stock price volatility and illiquidity.

Asia Region Risk. The value of the Fund’s assets may be adversely affected by, among other things, political, economic, social and religious instability, inadequate investor protection, accounting standards and practices, changes in laws or regulations of countries within the Asia region, relations with other nations, natural disasters, corruption, civil unrest, and military activity. Countries in the Asia region, particularly China, Japan and South Korea, may be adversely affected by disputes with many of their neighbors and historically strained relations with Japan could adversely impact economies in the region. The economies of many Asian countries differ from the economies of more developed countries in many respects, such as the rate of growth, inflation, capital reinvestment, resource self-sufficiency, financial system stability, and sensitivity to changes in global trade. Certain Asian countries are highly dependent upon and may be affected by developments in the United States, Europe and other Asian economies. Asian economies and companies could be affected if global economic conditions deteriorate as a result of political instability and uncertainty. In addition, international trade could be affected by politically motivated actions in the U.S. and Europe, and by increased tensions with other nations.

Europe and United Kingdom Risk. The value of the Fund’s assets may be adversely affected by, among other things, the social, political, regulatory, economic and other events or conditions affecting Europe and the United Kingdom (“U.K.”). Many countries in Europe are member states of the European Union (“EU”) and will be significantly affected by the fiscal and monetary controls of the EU. Changes in regulations on trade, decreasing imports or exports, changes in the exchange rate of the Euro and recessions or defaults or threats of defaults among European countries may have a significant adverse effect on the economies of other European countries. The European financial markets have experienced significant volatility, and several European countries have been adversely affected by unemployment, budget deficits and economic downturns. In addition, one or more countries may abandon the Euro and/or withdraw from the EU creating continuing uncertainty in the currency and financial markets generally. In this regard, the U.K. has commenced the official withdrawal process from the EU commonly referred to as “Brexit.” The uncertainty of Brexit could have a significant impact on the business and financial results of companies in the U.K. and other European countries. For example, Brexit could cause market and currency volatility, economic uncertainty, labor disruptions, political instability and uncertainty, and regulatory uncertainty for companies operating in the U.K. but that rely on cross-border labor and trade. During this period of political, legal and commercial uncertainty, the negative impact on not only the U.K. and European economies, but the broader global economy, could be significant, especially if the U.K. leaves the EU without agreements on trade, finance and other key elements, often called a “hard Brexit.” These uncertainties could potentially result in increased market volatility and illiquidity and lower economic growth for companies that rely significantly on the U.K. or on Europe for their business activities and revenues.

Value Investing Risk. A value investing strategy attempts to identify strong companies with stocks selling at a discount from their perceived true worth. It is subject to the risk that the stocks’ 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.

Liquidity Risk. The trading market for a particular security or type of security in which the Fund invests may be significantly less liquid than developed or even emerging markets, and there may be little or no trading volume for a period of time for a particular security. Reduced liquidity will have an adverse impact on the Fund’s ability to sell such securities quickly at a desired price when necessary to meet the Fund’s liquidity needs or in response to a specific economic event. It may be difficult at times to sell such securities at any price, which could impact not only the daily net asset value (NAV) of the Fund, but also the composition of the portfolio if other securities must be sold to meet the Fund’s liquidity needs. Additionally, market quotations for such securities may be volatile affecting the daily NAV of the Fund.

Sector and Industry Weightings Risk. To the extent the Fund emphasizes, from time to time, investments in a particular sector, the Fund will be subject to a greater degree to the risks particular to that sector, including the sectors described below. 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 securities in those sectors. The Fund may also from time to time make significant investments in an industry or industries within a particular sector. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Adverse conditions in such industry or industries could have a correspondingly adverse effect on the financial condition of issuers. These conditions may cause the value of the Fund’s shares to fluctuate more than the values of shares of funds that invest in a greater variety of investments.

Communication Services Sector Risk. The communication services sector includes companies in the diversified telecommunication services, wireless telecommunication services, and media and entertainment industries. The communication services sector is subject to government regulation and can be significantly affected by intense competition and technology changes, which may make the products and services of certain companies obsolete. The wireless telecommunication services industry can be significantly affected by failure to obtain, or delays in obtaining, financing or regulatory approval, intense competition, product incompatibility, changing consumer preferences, rapid obsolescence, significant capital expenditures, and heavy debt burdens. The media and entertainment industry can be significantly affected by technological advances and government regulation.

Consumer Staples Sector Risk. The consumer staples sector includes companies in the food and staples retailing, food, beverage and tobacco, and household and personal products industry groups. Companies in the consumer staples sector may be affected by demographics and product trends, competitive pricing, food fads, marketing campaigns, environmental factors, changes in consumer demands, the performance of the overall domestic and global economy, interest rates, consumer confidence and spending, and changes in commodity prices. Consumer staples companies may be subject to government regulations that may affect the permissibility of using various food additives and production methods. Tobacco companies may be adversely affected by regulation, legislation and/or litigation.

Energy Sector Risk. The energy sector includes companies in the energy equipment and services, and oil, gas and consumable fuels industry groups. The value of companies in these industry groups is particularly vulnerable to developments in the energy sector, which may include swift fluctuations in the price and supply of energy fuels caused by events relating to international politics, energy conservation initiatives, the success of exploration projects, the supply of, and demand for, specific energy-related products or services, and tax and other governmental regulatory policies. Oil and gas companies develop and produce crude oil and natural gas and provide related resources such as production- and distribution-related services. Stock prices for oil and gas companies in particular are affected by supply and demand both for companies’ specific products or services and for energy products in general. The performance of these companies will likewise be affected by the price of oil and gas, exploration and production spending, government regulation, world events and economic conditions. Weak demand for energy companies’ products or services or for energy products and services in general, as well as negative developments in these other areas, would adversely impact the energy stocks in which the Fund invests and the Fund’s performance. Oil and gas exploration and production companies can be significantly affected by natural disasters as well as changes in currency exchange rates, interest rates, government regulation, world events and economic conditions, and the companies may be at risk for environmental damage claims.

Financials Sector Risk. The financials sector includes companies in the banks, diversified financials, and insurance industry groups. Companies in the financials sector are 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. Banking companies, including thrifts and mortgage finance and consumer finance companies, may be affected by extensive government regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees they can charge, and the amount of capital they must maintain. Profitability is largely dependent on the availability and cost of capital funds, and can fluctuate significantly when interest rates change. Credit losses resulting from financial difficulties of borrowers can negatively affect banking companies. Banking companies may also be subject to severe price competition. Competition is high among banking companies and failure to maintain or increase market share may result in lost market value. Capital markets, a sub-industry of diversified financials, may be affected by extensive government regulation as well as economic and other financial events that could cause fluctuations in the stock market, impacting the overall value of investments. The insurance industry may be affected by extensive government regulation and can be significantly affected by interest rates, general economic conditions, and price and marketing competition. Different segments of the insurance industry can be significantly affected by natural disasters, mortality and morbidity rates, and environmental clean-up.

Health Care Sector Risk. The health care sector includes companies in the health care equipment and services, and pharmaceuticals, biotechnology and life sciences industry groups. 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. Companies in the pharmaceuticals, biotechnology and life sciences industry group in particular are heavily dependent on patent protection, and the expiration of patents may adversely affect the profitability of such companies. These companies are also subject to extensive litigation based on product liability and other similar claims. Many new products are subject to government approval and the process of obtaining government approval can be long and costly, and even approved products are susceptible to obsolescence. These companies are also subject to competitive forces that may make it difficult to increase prices, or that may lead to price reductions.

Industrials Sector Risk. The industrials sector includes companies in the capital goods, commercial and professional services and transportation industry groups, including companies engaged in the business of human capital management, business research and consulting, air freight and logistics, airlines, maritime shipping and transportation, railroads and trucking, transportation infrastructure, and aerospace and defense. Companies in the industrials sector can be significantly affected by general economic trends, including such factors as employment and economic growth, interest rate changes, changes in consumer spending, legislative and government regulation and spending, import controls, commodity prices, and worldwide competition. Changes in the economy, fuel prices, labor agreements, and insurance costs may result in occasional sharp price movements in transportation securities. Aerospace and defense companies rely, to a significant extent, on government demand for their products and services. The financial condition of, and investor interest in, aerospace and defense companies are heavily influenced by government defense spending policies.

Information Technology Sector Risk. The information technology sector includes companies in the software and services, technology hardware and equipment, and semiconductors and semiconductor equipment industry groups. Companies in the information technology sector are subject to rapid obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. Stocks of companies in the information technology sector, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Technological developments, fixed rate pricing, and the ability to retain skilled employees can significantly affect the industries in the information technology sector. Additionally, success in the internet services and infrastructure industry is subject to continued demand for internet services.

Real Estate Sector Risk. The real estate sector includes companies involved in real estate management and development and issuers of equity real estate investment trusts (REITs). Securities of companies in the real estate sector may be adversely affected by, among other things, rental income fluctuation, depreciation, property tax value changes, differences in real estate market values, overbuilding and extended vacancies, increased competition, costs of materials, operating expenses or zoning laws, costs of environmental clean-up or damages from natural disasters, cash flow fluctuations, and defaults by borrowers and tenants.

Utilities Sector Risk. The utilities sector includes electric utilities, gas utilities, water utilities, multi-utilities (electric, gas and water), and independent power and renewable electricity producers. Companies in the utilities sector are affected by supply and demand, consumer incentives, operating costs, government regulation, environmental factors, liabilities for environmental damage and general civil liabilities, and rate caps or rate changes. The value of regulated utility company stocks may have an inverse relationship to the movement of interest rates. Also, certain utility companies have experienced full or partial deregulation in recent years, which may permit them to diversify outside of their original geographic regions and their traditional lines of business. Conversely, companies that remain heavily regulated may be at a competitive disadvantage, making them less profitable. In addition, natural disasters, terrorist attacks, government intervention or other factors may render a utility company’s equipment unusable and may have an adverse impact on profitability. Utility companies are subject to the high cost of borrowing to finance capital construction during inflationary periods, restrictions on operations and increased costs and delays associated with compliance with environmental and nuclear safety regulations, and the difficulties involved in obtaining natural gas for resale or fuel for generating electricity at reasonable prices. Other risks include those related to the construction and operation of nuclear power plants, the effects of energy conservation, and the effects of regulatory changes.
Risk Lose Money [Text] rr_RiskLoseMoney 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.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading HISTORICAL PERFORMANCE
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock Effective October 31, 2017, the Wasatch Global Value Fund changed its principal investment strategy and correspondingly updated its name and changed its comparison benchmark index to reflect the change in principal strategy.  For periods prior to such date, the tables below reflect the performance of the Fund before the investment strategy change. The following tables provide information on how the Fund has performed over time. Performance in this section represents past performance (before and after taxes) which is not necessarily indicative of how the Fund will perform in the future. Performance for the Fund’s Investor Class shares would be substantially similar to that for Institutional Class shares 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 the Fund’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’s Investor Class for the calendar years shown in the bar chart. The average annual total returns table below allows you to compare the performance of the Fund’s Investor and Institutional Class shares over the time periods indicated to that of a broad-based market index. After-tax returns are shown for Investor Class only. After-tax returns for the Institutional Class will vary. Performance information is updated regularly and is available on the Fund’s website wasatchglobal.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart below is intended to provide you with an indication of the risks of investing in the Fund by showing the Fund’s performance from year to year, as represented by the Investor Class of the Fund. The average annual total returns table below allows you to compare the performance of the Fund’s Investor and Institutional Class shares over the time periods indicated to that of a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wasatchglobal.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Performance in this section represents past performance (before and after taxes) which is not necessarily indicative of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading WASATCH GLOBAL VALUE FUND — INVESTOR CLASS Year by Year Total Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Best and Worst Quarterly Returns
Best — 12/31/2011 11.62%
Worst — 9/30/2011 -17.23%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns — (as of 12/31/19)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate 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.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for Investor Class only. After-tax returns for the Institutional Class will vary.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher The Fund’s Investor Class returns after taxes on distributions and sale of Fund shares may be higher than the 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.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock 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’s tax situation and may differ from those shown. 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.

The Fund’s Investor Class returns after taxes on distributions and sale of Fund shares may be higher than the 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.
Wasatch Global Value Fund | Investor Class Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Redemption Fee (as a % of amount redeemed on shares held 60 days or less) rr_RedemptionFeeOverRedemption 2.00%
Exchange Fee rr_ExchangeFeeOverRedemption none
Maximum Account Fee rr_MaximumAccountFeeOverAssets none
Management Fee rr_ManagementFeesOverAssets 0.90%
Other Expenses rr_OtherExpensesOverAssets 0.29%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.19%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%)
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.10% [1]
1 Year rr_ExpenseExampleYear01 $ 112
3 Years rr_ExpenseExampleYear03 369
5 Years rr_ExpenseExampleYear05 646
10 Years rr_ExpenseExampleYear10 $ 1,435
2010 rr_AnnualReturn2010 11.11%
2011 rr_AnnualReturn2011 (3.92%)
2012 rr_AnnualReturn2012 10.55%
2013 rr_AnnualReturn2013 25.78%
2014 rr_AnnualReturn2014 5.85%
2015 rr_AnnualReturn2015 (3.13%)
2016 rr_AnnualReturn2016 16.65%
2017 rr_AnnualReturn2017 11.21%
2018 rr_AnnualReturn2018 (5.52%)
2019 rr_AnnualReturn2019 17.25%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2011
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.62%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.23%)
1 Year rr_AverageAnnualReturnYear01 17.25%
5 Years rr_AverageAnnualReturnYear05 6.84%
10 Years rr_AverageAnnualReturnYear10 8.14%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 25, 1996
Wasatch Global Value Fund | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Redemption Fee (as a % of amount redeemed on shares held 60 days or less) rr_RedemptionFeeOverRedemption 2.00%
Exchange Fee rr_ExchangeFeeOverRedemption none
Maximum Account Fee rr_MaximumAccountFeeOverAssets none
Management Fee rr_ManagementFeesOverAssets 0.90%
Other Expenses rr_OtherExpensesOverAssets 0.33%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.23%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.26%)
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.97% [1]
1 Year rr_ExpenseExampleYear01 $ 99
3 Years rr_ExpenseExampleYear03 365
5 Years rr_ExpenseExampleYear05 651
10 Years rr_ExpenseExampleYear10 $ 1,466
1 Year rr_AverageAnnualReturnYear01 17.45%
5 Years rr_AverageAnnualReturnYear05 6.98%
10 Years rr_AverageAnnualReturnYear10
Since Inception rr_AverageAnnualReturnSinceInception 9.01%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 31, 2012
Wasatch Global Value Fund | Return After Taxes on Distributions | Investor Class Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.34%
5 Years rr_AverageAnnualReturnYear05 4.38%
10 Years rr_AverageAnnualReturnYear10 5.31%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 25, 1996
Wasatch Global Value Fund | Return After Taxes on Distributions and Sale of Fund Shares | Investor Class Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.09%
5 Years rr_AverageAnnualReturnYear05 5.11%
10 Years rr_AverageAnnualReturnYear10 6.15%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 25, 1996
Wasatch Global Value Fund | MSCI AC (All Country) World Index (reflects no deductions for fees, expenses or taxes) | Investor Class Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 26.60% [2],[3]
5 Years rr_AverageAnnualReturnYear05 8.41% [2],[3]
10 Years rr_AverageAnnualReturnYear10 8.79% [2],[3]
Wasatch Global Value Fund | MSCI AC (All Country) World Index (reflects no deductions for fees, expenses or taxes) | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 26.60% [2],[3]
5 Years rr_AverageAnnualReturnYear05 8.41% [2],[3]
Since Inception rr_AverageAnnualReturnSinceInception 9.88% [2],[3]
[1] Wasatch Advisors, Inc., doing business as Wasatch Global Investors (Advisor), the Fund’s investment advisor, has contractually agreed to reimburse the Investor Class shares and Institutional Class shares of the Fund for Total Annual Fund Operating Expenses in excess of 1.10% and 0.95%, respectively, of average daily net assets until at least January 31, 2021 (excluding interest, dividend expense on short sales/interest expense, taxes, brokerage commissions, other investment related costs, acquired fund fees and expenses, and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of business). The Fund may only make repayments to the Advisor for amounts reimbursed if such repayment does not cause the Fund’s expense ratio, after the repayment is taken into account, to exceed both (i) the expense cap in place at the time such amounts were waived; and (ii) the Fund’s current expense cap. The Board of Trustees is the only party that can terminate the contractual limitation prior to the contract’s expiration. The Advisor can rescind the contractual limitation on expenses at any time after its expiration date. Shareholder expenses will increase if the Advisor does not renew the contractual expense cap after its expiration date.
[2] 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 indexes or financial products. This report is not approved or produced by MSCI.
[3] The MSCI ACWI is a broad-based market index that captures large- and mid-cap representation across 23 developed-market and 26 emerging-market countries.