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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Jul. 26, 2022
Entity Registrant Name dei_EntityRegistrantName INVESTMENT MANAGERS SERIES TRUST
Entity Central Index Key dei_EntityCentralIndexKey 0001318342
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jul. 26, 2022
Document Effective Date dei_DocumentEffectiveDate Jul. 28, 2022
Prospectus Date rr_ProspectusDate Jul. 28, 2022
WCM Focused Mid Cap Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading SUMMARY SECTION – WCM Focused Mid Cap Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The investment objective of the WCM Focused Mid Cap Fund (the “Fund”) is long-term capital appreciation.

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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 August 31, 2031
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). A 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. The Fund is newly-created and, as a result, does not yet have a portfolio turnover rate.

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 invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The example reflects the Fund’s contractual fee waiver and/or expense reimbursement only for the term of the contractual fee waiver and/or expense reimbursement.

 

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of mid capitalization companies. The Fund primarily invests in common stocks of U.S. companies and may include common stocks that are offered in initial public offerings (“IPOs”). The Fund may also invest in real estate investment trusts (“REITs”). The Fund’s advisor considers mid capitalization companies to be companies with market capitalizations within the range of those companies included in the Russell Midcap Index at the time of purchase. Because mid capitalization companies are defined by reference to an index, the range of market capitalization of companies in which the Fund invests may vary with market conditions. As of March 31, 2022, the market capitalizations of companies included in the Russell Midcap Index were between $2.7 billion and $61.4 billion. Investments in companies that move above or below the capitalization range of the Russell Midcap Index may continue to be held by the Fund in the Fund advisor’s sole discretion. The Fund will be managed pursuant to a “focused” strategy whereby the Fund’s investment advisor will typically invest the Fund’s assets in the equity securities of a small number of issuers. Generally, the Fund expects to hold the equity securities of approximately 40 or less issuers.

 

Value investing involves buying stocks that are out of favor and/or undervalued in comparison to their peers or their prospects for growth. The Fund’s advisor uses a bottom-up approach that seeks to identify companies trading at significant discounts to their intrinsic value. The Fund’s advisor seeks to determine a company’s intrinsic value through disciplined financial analysis. The Fund’s advisor believes that equities purchased at prices substantially below their intrinsic value may afford capital protection from permanent loss and may result in substantial appreciation if the market recognizes the company’s intrinsic value. The advisor’s investment process seeks companies that are industry leaders with sustainable competitive advantages; corporate cultures emphasizing strong, quality and experienced management; little or no debt; and attractive relative valuations. In selecting securities, the Fund’s advisor also considers other factors including, among others, political risk, monetary policy risk, and regulatory risk.

Risk [Heading] rr_RiskHeading Principal Risks of Investing
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Risk is inherent in all investing and you could lose money by investing in the Fund. A summary description of certain principal risks of investing in the Fund is set forth below. Before you decide whether to invest in the Fund, carefully consider these risk factors associated with investing in the Fund, which may cause investors to lose money. There can be no assurance that the Fund will achieve its investment objective.

 

Market Risk. The market price of a security or instrument may decline, sometimes rapidly or unpredictably, due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic or political conditions throughout the world, changes in the general outlook for corporate earnings, changes in interest or currency rates, or adverse investor sentiment generally. In addition, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have significant impact on a security or instrument. The market value of a security or instrument also may decline because of factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry.

 

Equity Risk. The value of the equity securities held by the Fund may fall due to general market and economic conditions, perceptions regarding the industries in which the issuers of securities held by the Fund participate, or factors relating to specific companies in which the Fund invests.

 

Mid Cap Company Risk. The securities of mid capitalization companies may be subject to more abrupt or erratic market movements and may have lower trading volumes or more erratic trading than securities of larger, more established companies or market averages in general. In addition, such companies typically are more likely to be adversely affected than large capitalization companies by changes in earning results, business prospects, investor expectations or poor economic or market conditions.

 

Focused Investing Risk. Because the Fund invests a greater proportion of its assets in the securities of a smaller number of issuers, the Fund will be more susceptible to negative events affecting those issuers, and the value of its shares may be more volatile than a fund that invests in a larger number of issuers.

 

Value-Oriented Investment Strategies Risk. Value stocks are those that are believed to be undervalued in comparison to their peers due to adverse business developments or other factors. Value investing is subject to the risk that the market will not recognize a security’s inherent value for a long time or at all, or that a stock judged to be undervalued may actually be appropriately priced or overvalued. In addition, during some periods (which may be extensive) value stocks generally may be out of favor in the markets.

 

Management and Strategy Risk. The value of your investment depends on the judgment of the Fund’s advisor about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, which may prove to be incorrect.

 

Sector Focus Risk. The Fund may invest a larger portion of its assets in one or more sectors than many other mutual funds, and thus will be more susceptible to negative events affecting those sectors. The Fund expects to invest a larger portion of its assets in the industrials sector. Performance of companies in the industrials sector may be affected by, among other things, supply and demand for their specific product or service and for industrial sector products in general. Moreover, government regulation, world events, exchange rates and economic conditions, technological developments, fuel prices, labor agreements, insurance costs, and liabilities for environmental damage and general civil liabilities will likewise affect the performance of these companies.

 

IPO Risk. The market value of IPO shares will fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk.

 

REIT Risk. The Fund’s investment in REITs will subject the Fund to risks similar to those associated with direct ownership of real estate, including losses from casualty or condemnation, and changes in local and general economic, supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes and operating expenses.

 

COVID-19 Related Market Events. The pandemic of the novel coronavirus respiratory disease designated COVID-19 has resulted in extreme volatility in the financial markets, a domestic and global economic downturn, severe losses, particularly to some sectors of the economy and individual issuers, and reduced liquidity of many instruments. There have also been significant disruptions to business operations, including business closures; strained healthcare systems; disruptions to supply chains and employee availability; large fluctuations in consumer demand; and widespread uncertainty regarding the duration and long-term effects of the pandemic. The pandemic may result in domestic and foreign political and social instability, damage to diplomatic and international trade relations, and continued volatility and/or decreased liquidity in the securities markets. Governments and central banks, including the Federal Reserve in the United States, took extraordinary and unprecedented actions to support local and global economies and the financial markets. This and other government intervention into the economy and financial markets to address the pandemic may not work as intended, particularly if the efforts are perceived by investors as being unlikely to achieve the desired results. Rates of inflation have also recently risen, which could adversely affect economies and markets. In addition, the COVID-19 pandemic, and measures taken to mitigate its effects, could result in disruptions to the services provided to the Fund by its service providers. Other market events like the COVID-19 pandemic may cause similar disruptions and effects.

 

No Operating History. The Fund is newly organized and has no operating history. As a result, prospective investors have no track record or history on which to base their investment decisions.

 

Cybersecurity Risk. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data (including private shareholder information), or proprietary information, or cause the Fund, the Fund’s advisor, and/or other service providers (including custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality. In an extreme case, a shareholder’s ability to exchange or redeem Fund shares may be affected. Issuers of securities in which the Fund invests are also subject to cybersecurity risks, and the value of those securities could decline if the issuers experience cybersecurity incidents.

Risk Lose Money [Text] rr_RiskLoseMoney Risk is inherent in all investing and you could lose money by investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The Fund is new and does not have a full calendar year performance record to compare against other mutual funds or broad measures of securities market performance such as indices. Performance information will be available after the Fund has been in operation for one calendar year.

Performance One Year or Less [Text] rr_PerformanceOneYearOrLess The Fund is new and does not have a full calendar year performance record to compare against other mutual funds or broad measures of securities market performance such as indices.
WCM Focused Mid Cap Fund | Investor Class Shares  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol WMIDX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Shareholder Fee, Other rr_ShareholderFeeOther $ 15
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 2.04%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 2.14%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 3.24%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.99%) [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.25% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 127
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 397
WCM Focused Mid Cap Fund | Institutional Class Shares  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol WCMAX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Shareholder Fee, Other rr_ShareholderFeeOther $ 15
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 2.04%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 2.14%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.99%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.99%) [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.00% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 318
[1] The Fund’s advisor has contractually agreed to waive its fees and/or pay for operating expenses of the Fund to ensure that total annual fund operating expenses (excluding any taxes, leverage interest, brokerage commissions, dividend and interest expenses on short sales, acquired fund fees and expenses (as determined in accordance with SEC Form N-1A), expenses incurred in connection with any merger or reorganization, and extraordinary expenses such as litigation expenses) do not exceed 1.25% and 1.00% of the average daily net assets of the Fund’s Investor Class and Institutional Class shares, respectively. This agreement is in effect until August 31, 2031, and may be terminated before that date only by the Trust’s Board of Trustees. The Fund’s advisor is permitted to seek reimbursement from the Fund, subject to certain limitations, of fees waived or payments made to the Fund for a period ending three full fiscal years after the date of the waiver or payment. This reimbursement may be requested from the Fund if the reimbursement will not cause the Fund’s annual expense ratio to exceed the lesser of (a) the expense limitation in effect at the time such fees were waived or payments made, or (b) the expense limitation in effect at the time of the reimbursement.