v3.25.4
Transamerica Energy Infrastructure Investment Risks - Retail Class [Member] - Transamerica Energy Infrastructure
Oct. 31, 2025
Market [Member]  
Prospectus [Line Items]  
Risk [Text Block] Market – The market prices of the fund’s securities or other assets may go up or down, sometimes rapidly or unpredictably, due to factors such as economic events, inflation, changes in interest rates, governmental actions or interventions, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by tariffs, trade disputes, labor strikes, supply chain disruptions or other factors, government shutdowns, political developments, civil unrest, acts of terrorism, armed conflicts, economic sanctions, countermeasures in response to sanctions, cybersecurity events, technological developments (such as artificial intelligence and machine learning) investor sentiment, the global and domestic effects of widespread or local health, weather or climate events, and other factors that may or may not be related to the issuer of the security or other asset. The market price of a security may also fall due to specific conditions that affect a particular sector of the securities market, a particular industry or a particular issuer or group of issuers. To the extent that securities of certain issuers behave or are perceived to behave similarly to each other, the market prices of those securities (or the market as a whole) may fall in response to a decline in the price of a particular security or group of securities. If the market prices of the fund’s securities and assets fall, the value of your investment in the fund could go down. Economies and financial markets throughout the world are increasingly interconnected. Events or circumstances in one or more countries or regions could be highly disruptive to, and have profound impacts on, global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the fund’s investments may go down. The long-term consequences to the U.S. economy of the continued expansion of U.S. government debt and deficits are not known. Also, raising the ceiling on U.S. government debt and periodic legislation to fund the government have become increasingly politicized. Any failure to do either could lead to a default on U.S. government obligations, with unpredictable consequences for the fund’s investments, and generally for economies and markets in the U.S. and elsewhere.
Energy Sector [Member]  
Prospectus [Line Items]  
Risk [Text Block] Energy Sector – Under normal circumstances, the fund concentrates its investments in industries in the energy sector, which means the fund will be more affected by the performance of the energy sector than a fund that is more diversified. Investing in the energy sector involves a number of risks, including: •Supply and Demand. A decrease in the production of natural gas, natural gas liquids, crude oil, coal or other energy commodities, a decrease in the volume of such commodities available for transportation, processing, storage or distribution or a sustained decline in demand for such commodities, may adversely impact the financial performance of energy companies. •Depletion and Exploration. Energy reserves naturally deplete as they are consumed over time. The financial performance of energy companies may be adversely affected if they, or the companies to whom they provide services, are unable to cost-effectively acquire additional energy deposits sufficient to replace the natural decline of existing reserves. Also, the quantities of reserves may be overstated, or deposits may not be produced in the time periods anticipated. •Reserve. Energy companies engaged in the production of natural gas, natural gas liquids, crude oil, coal or other energy commodities are subject to the risk that the quantities of their reserves are overstated, or will not be produced in the time periods anticipated, for a variety of reasons. •Legal and Regulatory. Energy companies are subject to significant federal, state and local government regulation in virtually every aspect of their operations, including (i) how facilities are constructed, maintained and operated, (ii) how and where wells are drilled, (iii) how services are provided, (iv) environmental and safety controls, and (v) the prices they may charge for the products and services they provide. Companies in the energy sector may also be at increased risk for litigation. •Commodity Pricing. The operations and financial performance of energy companies may be directly affected by energy commodity prices, especially those energy companies which own the underlying energy commodity or receive payments for services that are based on commodity prices. •Acquisition. The ability of energy companies to grow operating cash flow and increase such company’s enterprise value can be highly dependent on their ability to make accretive acquisitions. In the event that energy companies are unable to make such acquisitions, whether because they are unable to identify attractive acquisition candidates and negotiate and close acceptable purchase contracts or to raise financing for such acquisitions on economically acceptable terms, or otherwise, their future growth may be limited. •Affiliated Party. Certain energy companies are dependent on their parents or sponsors for a majority of their revenues. Any failure by such company’s parents or sponsors to satisfy their payments or obligations would impact such company’s revenues and operating cash flows and ability to make interest payments and/or distributions. •Catastrophe. The operations of energy companies are subject to many hazards inherent in the exploring, developing, producing, generating, transporting, transmission, storing, gathering, processing, refining, distributing, or marketing of natural gas, natural gas liquids, crude oil, refined products, coal or electricity, including: damage to pipelines, storage tanks, plants or related equipment and surrounding properties caused by hurricanes, tornadoes, floods, fires and other natural disasters or by acts of terrorism; inadvertent damage from construction and farm equipment; well blowouts; leaks of such energy commodities; fires and explosions. •Market Disruption. Global events and economic conditions could have significant adverse effects on the energy sector, the U.S. economy and financial and commodities markets. Events that may have such an effect include acts of terrorism, disputes among energy-producing countries and global health pandemics. •Weather. Extreme weather conditions, such as hurricanes, (i) could result in substantial damage to the facilities of certain energy companies located in the affected areas, (ii) significantly increase the volatility in the supply of energy commodities and (iii) adversely affect the financial performance of energy companies, and could therefore adversely affect the value of their securities. The damage done by extreme weather also may serve to increase many insurance premiums paid by energy companies and could adversely affect such companies’ financial condition. Concerns about global warming trends may result in increased regulation of energy or energy infrastructure companies that produce, transport or rely heavily on fossil fuels such as oil, natural gas and coal and increase their operating costs, and negative investor perception of such companies may limit their access to, and increase their cost of, capital. •Midstream Companies. Certain energy infrastructure projects involving midstream companies have experienced significant delays related to difficulties in obtaining the necessary permits to proceed with construction (or some phase of construction). These delays have raised concerns about the ability of midstream companies to place such projects in service and their ability to get the necessary financing to complete such projects. Furthermore, it has become much more common for opponents of energy infrastructure development to utilize the courts, media campaigns and political activism to attempt to stop, or delay as much as possible, these projects. Significant delays could result in a material increase in the cost of developing these projects and could result in midstream companies developing such projects failing to generate the expected return on investment or, if the project does not go forward, realizing a financial loss, either of which would adversely affect the results of operations and financial performance of the affected midstream companies. Natural gas transmission pipeline systems, crude oil transportation pipeline systems, refined products transportation pipeline systems, and certain classes of storage facilities and related assets owned by midstream companies are subject to regulation by the Federal Energy Regulatory Commission (“FERC”). The regulators have authority to regulate natural gas pipeline transmission, crude oil pipeline transportation services, and refined products pipeline transportation services including the rates charged for the services, terms and conditions of service, certification and construction of new facilities, the extension or abandonment of services and facilities, the maintenance of accounts and records, the acquisition and disposition of facilities, the initiation and discontinuation of services, and various other matters. Action by the FERC could adversely affect the ability of midstream companies to establish or charge rates that would cover future increases in their costs, such as additional costs related to environmental matters including any climate change regulation, or even to continue to collect rates that cover current costs, including a reasonable rate of return. It could also become more common for regulatory agencies (such as FERC) to include the impact of carbon emissions from energy infrastructure assets as a consideration in granting permits for the construction or operation of such assets. This could result in costly delays in obtaining permits, requirements to spend additional capital to limit carbon emissions or denial of required permits to operate existing or proposed energy infrastructure assets. Any such change could have an adverse impact on the financial condition, results of operations, or cash flows of midstream companies. •Power Infrastructure. The revenues of power infrastructure companies are often dependent upon the availability of electric power and/or the consumption of electric power and could be adversely affected by reductions in the supply of, or demand for, such power. The adverse impact of these events could lead to a material reduction in the earnings of power infrastructure companies and a substantial reduction (or elimination) of dividends paid to equity holders, and could result in a decline in (i) the equity values of the affected power infrastructure companies and/or (ii) our net investment income. The production or availability of electric power could be negatively affected by a variety of factors, including depressed power prices, high prices for commodities used in the generation of power, lower than expected wind, solar or hydro power resources, catastrophic or extreme weather events, labor relations, increased environmental or other governmental regulation (including policies designed to reduce carbon emissions and/or address climate change), equipment malfunctions, transmission grid disruptions and maintenance difficulties. A decline in demand for power could result from factors such as increased power prices, adverse economic conditions, increased taxation, increased governmental regulation, catastrophic events, extreme weather events, equipment malfunctions, transmission grid disruptions and maintenance difficulties. Certain power infrastructure companies may have assets that focus on generating electricity from renewable resources or provide services supporting such generation. The generation of electricity from renewable resources may be highly dependent upon governmental policies that support such generation and enhance its economic viability (including tax credits, accelerated cost recovery systems of depreciation and renewable portfolio standards).
Industry Concentration [Member]  
Prospectus [Line Items]  
Risk [Text Block] Industry Concentration – The fund concentrates its investments in a specific industry or industries. Concentration in a particular industry heightens the risks associated with that industry. As a result, the fund may be subject to greater price volatility and risk of loss as a result of adverse economic, business or other developments affecting that industry than funds investing in a broader range of industries.
Master Limited Partnerships [Member]  
Prospectus [Line Items]  
Risk [Text Block] Master Limited Partnerships – Investments in MLPs involve risks that differ from investments in corporate issuers, including risks related to limited control and limited rights to vote on matters affecting the MLP, risks related to potential conflicts of interest between the MLP and the MLP’s general partner, cash flow risks, dilution risks, certain tax risks, and risks related to the general partner’s right to require unitholders to sell their common units at an undesirable time or price. The MLP entities in which the fund invests are typically focused in the energy sector. A downturn in the energy sector could have an adverse impact on the fund. Energy MLPs may be adversely affected by changes in and volatility of commodity prices. At times, the performance of securities of companies in the energy sector of the economy may lag the performance of other sectors or the broader market as a whole. The yields for equity and debt securities of MLPs and other issuers in the energy sector are susceptible in the short-term to fluctuations in interest rates and the value of the fund’s investments in such securities may decline if interest rates rise. The value of the fund’s investment in MLPs depends to a significant extent on the MLPs being treated as partnerships for U.S. federal income tax purposes. If an MLP does not meet the legal requirements to maintain partnership status, it could be taxed as a corporation and there could be a material decrease in the value of its securities.
Equity Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Equity Securities – Equity securities generally have greater risk of loss than debt securities. Stock markets are volatile and the value of equity securities may go up or down, sometimes rapidly and unpredictably. The market price of an equity security may fluctuate based on overall market conditions, such as real or perceived adverse economic or political conditions or trends, tariffs and trade disruptions, wars, social unrest, inflation, substantial economic downturn or recession, changes in interest rates, or adverse investor sentiment. The market price of an equity security also may fluctuate based on real or perceived factors affecting a particular industry or industries or the company itself. If the market prices of the equity securities owned by the fund fall, the value of your investment in the fund will decline. The fund may lose its entire investment in the equity securities of an issuer. A change in financial condition or other event affecting a single issuer may adversely impact securities markets as a whole.
Non Diversification [Member]  
Prospectus [Line Items]  
Risk [Text Block] Non-Diversification – As a “non-diversified” fund, the fund may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund. Investing in a smaller number of issuers will make the fund more susceptible to the risks associated with investing in those issuers.
Liquidity [Member]  
Prospectus [Line Items]  
Risk [Text Block] Liquidity – The fund may make investments that are illiquid or that become illiquid after purchase. Illiquid investments can be difficult to value, may trade at a discount from comparable, more liquid investments, and may be subject to wide fluctuations in value. Liquidity risk may be magnified in rising interest rate or volatile environments. If the fund is forced to sell an illiquid investment to meet redemption requests or other cash needs, the fund may be forced to sell at a substantial loss or may not be able to sell at all. Liquidity of particular investments, or even entire asset classes, including U.S. Treasury securities, can deteriorate rapidly, particularly during times of market turmoil, and those investments may be difficult or impossible for the fund to sell. This may prevent the fund from limiting losses.
Valuation [Member]  
Prospectus [Line Items]  
Risk [Text Block] Valuation – Certain investments may be more difficult to value than other types of investments. The sales price the fund could receive for any particular portfolio investment may differ from the fund's valuation of the investment, particularly for securities that trade in thin or volatile markets, that are priced based upon valuations provided by third party pricing services, or that are valued using a fair value methodology. These differences may increase significantly and affect fund investments more broadly during periods of market volatility. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the fund had not fair-valued securities or had used a different valuation methodology. The fund’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers. Fair value pricing involves subjective judgment, which may prove to be incorrect.
Focused Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block] Focused Investing – To the extent the fund invests a significant portion of its assets in a limited number of countries, regions, sectors, industries or market segments, in a limited number of issuers, or in issuers in related businesses or that are subject to related operating risks, the fund will be more susceptible to negative events affecting those countries, regions, sectors, industries, segments or issuers, and the value of its shares may be more volatile than if it invested more widely.
Management [Member]  
Prospectus [Line Items]  
Risk [Text Block] Management – The value of your investment may go down if the investment manager’s or sub-adviser's judgments and decisions are incorrect or otherwise do not produce the desired results, or if the investment strategy does not work as intended. You may also suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, investment techniques applied, or the analyses employed or relied on, by the investment manager or sub-adviser, if such tools, resources, information or data are used incorrectly or otherwise do not work as intended, or if the investment manager’s or sub-adviser's investment style is out of favor or otherwise fails to produce the desired results. Any of these things could cause the fund to lose value or its results to lag relevant benchmarks or other funds with similar objectives.
Active Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block] Active Trading – The fund may engage in active trading of its portfolio. Active trading will increase transaction costs and could detract from performance. Active trading may be more pronounced during periods of market volatility and may generate greater amounts of short-term capital gains.
Capital Markets Access [Member]  
Prospectus [Line Items]  
Risk [Text Block] Capital Markets Access – Energy companies may be unable to obtain new debt or equity financing on acceptable terms. If funding is not available when needed, or is available only on unfavorable terms, energy companies may not be able to meet their obligations as they come due or respond to competitive pressures.
Cash Flow [Member]  
Prospectus [Line Items]  
Risk [Text Block] Cash Flow – A substantial portion of the income received by the fund is expected to be derived from investments in equity securities of energy companies. Cash from operations may vary widely from quarter to quarter and may be significantly affected by factors affecting the energy industry in general.
Counterparty [Member]  
Prospectus [Line Items]  
Risk [Text Block] Counterparty – The fund could lose money if the counterparties to derivatives, repurchase agreements and/or other financial contracts entered into for the fund do not fulfill their contractual obligations. In addition, the fund may incur costs and may be hindered or delayed in enforcing its rights against a counterparty. These risks may be greater to the extent the fund has more contractual exposure to a counterparty.
Credit [Member]  
Prospectus [Line Items]  
Risk [Text Block] Credit – If an issuer or other obligor (such as a party providing insurance or other credit enhancement) of a security held by the fund or a counterparty to a financial contract with the fund is unable or unwilling to meet its financial obligations, or is downgraded or perceived to be less creditworthy (whether by market participants, ratings agencies, pricing services or otherwise), or if the value of any underlying assets declines, the value of your investment will typically decline. A decline may be rapid and/or significant, particularly in certain market environments. In addition, the fund may incur costs and may be hindered or delayed in enforcing its rights against an issuer, obligor or counterparty.
Currency [Member]  
Prospectus [Line Items]  
Risk [Text Block] Currency – The value of a fund’s investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. U.S. dollar-denominated securities of foreign issuers may also be affected by currency risk. Currency exchange rates can be volatile and may fluctuate significantly over short periods of time. Currency conversion costs and currency fluctuations could reduce or eliminate investment gains or add to investment losses. A fund may be unable or may choose not to hedge its foreign currency exposure or any hedge may not be effective.
Cybersecurity [Member]  
Prospectus [Line Items]  
Risk [Text Block] Cybersecurity – Cybersecurity incidents, both intentional and unintentional, may allow an unauthorized party to gain access to fund assets, fund or shareholder data (including private shareholder information), or proprietary information, cause the fund or its service providers (including, but not limited to, the fund’s investment manager, any sub-adviser(s), transfer agent, distributor, custodian, fund accounting agent and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality, or prevent fund investors from purchasing, redeeming or exchanging shares, receiving distributions or receiving timely information regarding the fund or their investment in the fund. Cybersecurity incidents may render records of fund assets and transactions, shareholder ownership of fund shares, and other data integral to the functioning of the fund inaccessible, inaccurate or incomplete. The use of artificial intelligence and machine learning could exacerbate these risks. Cybersecurity incidents may result in financial losses to the fund and its shareholders, and substantial costs may be incurred in order to prevent or mitigate any future cybersecurity incidents.
Distressed Or Defaulted Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Distressed or Defaulted Securities – Investments in defaulted securities and obligations of distressed issuers, including securities that are, or may be, involved in reorganizations or other financial restructurings, either out of court or in bankruptcy, involve substantial risks in addition to the risks of investing in high-yield debt securities. These securities are considered speculative with respect to the issuers’ continuing ability to make principal and interest payments. The fund may incur costs to protect its investment, and the fund could lose its entire investment. Distressed securities and any securities received in an exchange for such securities may be subject to restrictions on resale.
Dividend Practice [Member]  
Prospectus [Line Items]  
Risk [Text Block] Dividend Practice – There can be no assurance that the fund will be able to pay quarterly dividends at a relatively consistent level. The fund’s dividend practice can be expected to result in the fund returning capital to its shareholders from time to time. When the fund returns capital, the net asset value of your original investment in the fund goes down to reflect that. The tax status of certain distributions by the fund may be recharacterized at year-end.
Extension [Member]  
Prospectus [Line Items]  
Risk [Text Block] Extension – When interest rates rise, payments of fixed-income securities, including asset- and mortgage-backed securities, may occur more slowly than anticipated, causing their market prices to decline.
Fixed Income Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Fixed-Income Securities – Risks of fixed-income securities include credit risk, interest rate risk, counterparty risk, prepayment risk, extension risk, valuation risk, and liquidity risk. The value of fixed-income securities may go up or down, sometimes rapidly and unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, tariffs and trade disruptions, wars, social unrest, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. In addition, the value of a fixed-income security may decline if the issuer or other obligor of the security fails to pay principal and/or interest, otherwise defaults or has its credit rating downgraded or is perceived to be less creditworthy, or the credit quality or value of any underlying assets declines. If the value of fixed-income securities owned by the fund falls, the value of your investment will go down. The fund may lose its entire investment in the fixed-income securities of an issuer.
Foreign Investments [Member]  
Prospectus [Line Items]  
Risk [Text Block] Foreign Investments – Investing in securities of foreign issuers or issuers with significant exposure to foreign markets involves additional risks. Foreign markets can be less liquid, less regulated, less transparent and more volatile than U.S. markets. The value of the fund’s foreign investments may decline, sometimes rapidly or unpredictably, because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, including nationalization, expropriation or confiscatory taxation, reduction of government or central bank support, tariffs and trade disruptions, sanctions, political or financial instability, social unrest or other adverse economic or political developments. Foreign investments may also be subject to different accounting practices and different regulatory, legal, auditing, financial reporting and recordkeeping standards and practices, and may be more difficult to value than investments in U.S. issuers. Certain foreign clearance and settlement procedures may result in an inability to execute transactions or delays in settlement.
High Yield Debt Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] High-Yield Debt Securities – High-yield debt securities, commonly referred to as “junk” bonds, are securities that are rated below “investment grade” or are of comparable quality. Changes in interest rates, the market’s perception of the issuers, the creditworthiness of the issuers and negative perceptions of the junk bond market generally may significantly affect the value of these bonds. Junk bonds are considered speculative, tend to be volatile, typically have a higher risk of default, tend to be less liquid and more difficult to value than higher grade securities, and may result in losses for the fund.
Interest Rate [Member]  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate –The value of fixed-income securities generally goes down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities. Changes in interest rates can be sudden and unpredictable and may expose the markets to significant volatility, which also may affect the liquidity of the fund’s investments and detract from fund performance. A variety of factors can impact interest rates, including central bank monetary policies and inflation rates. A general rise in interest rates may cause investors to sell fixed-income securities on a large scale, which could adversely affect the price and liquidity of fixed-income securities generally and could also result in increased redemptions from the fund. Increased redemptions could cause the fund to sell securities at inopportune times or depressed prices and result in further losses. Inflation and interest rates have been volatile and may increase in the future. Interest rate increases in the future may cause the value of fixed-income securities to decrease and, conversely, interest rate reductions may cause the value of fixed-income securities to increase. The yields for equity securities of certain energy infrastructure companies are generally susceptible in the short-term to fluctuations in interest rates and the prices of such equity securities may decline when interest rates rise. This is also true for investments in debt instruments of energy infrastructure companies. Rising interest rates can adversely impact the financial performance of energy infrastructure companies by increasing the cost of capital. This may reduce such companies’ ability to execute acquisitions or expansion projects in a cost-effective manner.
IPOs [Member]  
Prospectus [Line Items]  
Risk [Text Block] IPOs – The market value of initial public offering (“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.
Large Capitalization Companies [Member]  
Prospectus [Line Items]  
Risk [Text Block] Large Capitalization Companies – The fund’s investments in larger, more established companies may underperform other segments of the market because they may be less responsive to competitive challenges and opportunities and unable to attain high growth rates during periods of economic expansion.
Large Shareholder [Member]  
Prospectus [Line Items]  
Risk [Text Block] Large Shareholder – A significant portion of the fund’s shares may be owned by one or more investment vehicles or institutional investors. Transactions by these large shareholders may be disruptive to the management of the fund. For example, the fund may experience large redemptions and could be required to sell securities at a time when it may not otherwise desire to do so. Such transactions may increase the fund’s brokerage and/or other transaction costs. These transactions may also accelerate the realization of taxable capital gains to shareholders. In addition, sizeable redemptions could cause the fund’s total expenses to increase.
Leveraging [Member]  
Prospectus [Line Items]  
Risk [Text Block] Leveraging – To the extent that the fund borrows or uses derivatives or other investments, such as ETFs, that have embedded leverage, your investment may be subject to heightened volatility, risk of loss and costs. Other risks also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have. Use of leverage may result in the loss of a substantial amount, and possibly all, of the fund’s assets. The fund also may have to sell assets at inopportune times to satisfy its obligations.
Prepayment Or Call [Member]  
Prospectus [Line Items]  
Risk [Text Block] Prepayment or Call – Many issuers have a right to prepay their fixed-income securities. If this happens, the fund will not benefit from the rise in the market price of the securities that normally accompanies a decline in interest rates and may be forced to reinvest the prepayment proceeds in securities with lower yields.
Privately Placed And Other Restricted Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Privately Placed and Other Restricted Securities – Restricted securities, which include private placements of private and public companies, are subject to legal or contractual restrictions on their resale. Restricted securities may be difficult to sell at the time and price a fund prefers. Restricted securities may be difficult to value properly and may involve greater risks than securities that are not subject to restrictions on resale, both of which may result in substantial losses. An insufficient number of eligible buyers interested in purchasing restricted securities held by a fund could adversely affect the marketability of such securities and a fund might be unable to dispose of such securities promptly or at reasonable prices, adversely affecting a fund’s overall liquidity and performance. Restricted securities may not be listed on an exchange and may have no active trading market. A fund may incur additional expense when disposing of restricted securities. Restricted securities may involve a high degree of business and financial risk and may result in substantial losses to the fund.
Repurchase Agreements [Member]  
Prospectus [Line Items]  
Risk [Text Block] Repurchase Agreements – In a repurchase agreement, the fund purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the fund at a later date, and at a specified price. The securities purchased serve as the fund's collateral for the obligation of the counterparty to repurchase the securities. If the counterparty does not repurchase the securities, the fund is entitled to sell the securities, but the fund may not be able to sell them for the price at which they were purchased, thus causing a loss. If the counterparty becomes insolvent, there is some risk that the fund will not have a right to the securities, or the immediate right to sell the securities.
Small And Medium Capitalization Companies [Member]  
Prospectus [Line Items]  
Risk [Text Block] Small and Medium Capitalization Companies – The fund will be exposed to additional risks as a result of its investments in the securities of small or medium capitalization companies. Small or medium capitalization companies may be more at risk than large capitalization companies because, among other things, they may have limited product lines, operating history, market or financial resources, or because they may depend on a limited management group. Securities of small and medium capitalization companies may be more volatile than and may underperform large capitalization companies, may have limited liquidity, may be harder to sell at times and at prices the portfolio managers believe appropriate and may offer greater potential for losses.
Tax [Member]  
Prospectus [Line Items]  
Risk [Text Block] Tax – In order to qualify for treatment as a regulated investment company (“RIC”) under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), the fund must meet certain requirements regarding the composition of its income, the diversification of its assets, and the amounts of its distributions. If the fund were to fail to meet any of these requirements, the fund might not be eligible for treatment as a RIC, in which case it would be subject to federal income tax on its net income at applicable corporate rates (without reduction for distributions to shareholders). When distributed, that income would generally be taxable to shareholders as ordinary dividend income to the extent attributable to the fund’s earnings and profits. If the fund were to fail to qualify as a RIC, shareholders of the fund could realize significantly diminished returns from their investment in the fund. In the alternative, the fund may be able to preserve its RIC qualification under those circumstances by meeting certain conditions, in which case it may be subject to certain additional taxes. The fund may invest no more than 25% of its total assets in the securities of MLPs and other entities treated as qualified publicly traded partnerships for federal income tax purposes. An MLP is an entity treated as a partnership under the Internal Revenue Code, the partnership interests of which are traded on securities exchanges like shares of corporate stock. To qualify as an MLP, an entity must receive at least 90% of its income from qualifying sources such as interest, dividends, income and gain from mineral or natural resources activities, income and gain from the transportation or storage of certain fuels, and, in certain circumstances, income and gain from commodities or futures, forwards and options with respect to commodities. For this purpose, mineral or natural resources activities include exploration, development, production, refining, marketing and transportation (including pipelines) of oil and gas, minerals, geothermal energy, fertilizer, timber or industrial source carbon dioxide. If it does not so qualify, it will generally be subject to tax as a corporation and there could be a material decrease in the value of its securities. Depreciation or other cost recovery deductions passed through to the fund from investments in MLPs in a given year will generally reduce the fund’s taxable income, but those deductions may be recaptured in the fund’s income in one or more subsequent years. When recognized and distributed, recapture income will generally be taxable to shareholders at the time of the distribution at ordinary income tax rates, even though those shareholders might not have held shares in the fund at the time the deductions were taken by the fund, and even though those shareholders may not have corresponding economic gain on their shares at the time of the recapture. In order to distribute recapture income or to fund redemption requests, the fund may need to liquidate investments, which may lead to additional recapture income. Changes in tax laws or regulations, or interpretations thereof in the future, could adversely affect the fund or the issuers in which the fund invests. Any such changes could negatively impact the value of the fund’s investments and the amount and tax characterization of distributions paid by the fund.
Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You may lose money if you invest in this fund.
Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.