The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund’s performance. No portfolio turnover rate is provided for the Fund because the Fund had not commenced operations prior to the date of this Prospectus.

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

“Other Expenses” are estimated for the Fund’s current fiscal year.

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 (taking into account the Expense Caps for one year).

Expense Example by, Year, Caption [Text]

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

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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Under normal market conditions, the Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities issued by real estate companies operating in the United States, including real estate investment trusts (“REITs”). The Fund’s investments in equity securities may include common stocks, preferred stocks and securities offered in initial public offerings (“IPOs”). The Fund may invest in these equity securities directly or indirectly through investments in other investment companies, including exchange-traded funds (“ETFs”). The Fund defines a real estate company as any company that derives at least 50% of its revenue from, or has at least 50% of its assets in, real estate. The Fund considers a real estate company to be operating in the United States if the real estate company: (i) is organized in the United States, (ii) trades principally in a United States market, or (iii) derives at least 50% of its revenue from, or has at least 50% of its assets located in, the United States. The Fund may invest in the securities of real estate companies of any market capitalization.

The Fund may sell securities regardless of how long they have been held if the Adviser determines that a current position has become overvalued relative to its peers, if a company makes a strategic decision with which the Adviser disagrees, if the Adviser finds an opportunity that they believe is more compelling, or if the Adviser’s outlook on the company or market changes.

The Adviser makes investment decisions through a bottom-up strategy, focusing on individual security selection. To guide the portfolio construction process, the Adviser incorporates both quantitative and qualitative analysis in real estate securities. The Adviser analyzes factors such as management, financial condition, cash flow, and company’s growth potential estimates to select companies in the real estate industry that it believes will make attractive long-term investments. The research process includes an evaluation of the commercial real estate supply and demand dynamics, management, strategy, property quality, financial strength and corporate structure. Judgments with respect to risk control, geographic and property sector variety, liquidity and other factors are considered and drive the Adviser’s investment decisions. In an effort to achieve its goal, the Fund may engage in active and frequent trading. The Fund is non-diversified, which means that it may invest a significant portion of its assets in the securities of a single issuer or small number of issuers.

Risk [Heading]

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Principal Risks

Risk Narrative [Text Block]

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As with any mutual fund, there are risks to investing. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. Remember, in addition to possibly not achieving your investment goals, you could lose all or a portion of your investment in the Fund over short or even long periods of time. The principal risks of investing in the Fund are:

New Fund Risk. As of the date of this Prospectus, the Fund has no operating history and may not attract sufficient assets to achieve or maximize investment and operational efficiencies.

Limited Operating History Risk. The Fund has a limited operating history upon which prospective investors can evaluate its performance. Although the investment strategies described herein may have been utilized by investment accounts managed by the Adviser’s investment team, past performance is not indicative of future results.

Common Stock Risk. While common stocks have historically generated higher average returns than fixed income securities over the long-term, common stock has also experienced significantly more volatility in those returns, although under certain market conditions, fixed-income investments may have comparable or greater price volatility. An adverse event, such as an unfavorable earnings report, may depress the value of common stock held by the Fund. Also, the price of common stock is sensitive to general movements in the stock market. A drop in the stock market may depress the price of common stock held by the Fund.

IPO Risk. The prices of securities purchased in IPOs tend to fluctuate more widely than securities of companies that have been publicly traded for a longer period of time. Securities purchased in IPOs generally do not have a trading history, and information about the issuers of such securities may be available for very limited periods. At any particular time or from time to time a Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired because, for example, only a small portion (if any) of the securities being offered in an IPO may be made available to the Fund. In addition, under certain market conditions a relatively small number of companies may issue securities in IPOs. There can be no assurance that investments in IPOs will be available to the Fund or improve the Fund’s performance.

Management Risk. The Fund is subject to the risk of poor stock selection. In other words, the individual stocks in the Fund may not perform as well as expected, and/or the Fund's portfolio management practices may not work to achieve their desired result.

Market Risk. The net asset value (“NAV”) of the Fund will change with changes in the market value of its portfolio positions. Investors may lose money.

REIT and other Real Estate Companies Risk. The Fund’s investments in REITs and other real estate companies are subject to the same risks as direct investments in real estate, and their value will depend on the value of the underlying real estate interests. These risks include possible declines in the value of real estate, possible lack of availability of mortgage funds and unexpected vacancies of properties. REITs that invest in real estate mortgages are also subject to prepayment risk. Investing in REITs may involve risks similar to those associated with investing in small capitalization companies. REITs may have limited financial resources, may trade less frequently and in a limited volume and may be subject to more abrupt or erratic price movements than larger company securities. Historically, small capitalization stocks, such as REITs, have been more volatile in price than the larger capitalization stocks included in the S&P 500^® Index. The Fund will indirectly bear its proportionate share of any expenses, including management fees, paid by an externally managed REIT in which it invests.

Non-Diversification Risk. The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV and total returns may fluctuate or fall more than a diversified mutual fund. Gains or losses on a single stock may have a greater impact on the Fund.

Other Investment Company Risk. The Fund may be subject to the risk that an investment company, including an ETF, in which the Fund invests will not achieve its investment objective or execute its investment strategies effectively or that significant purchase or redemption activity by shareholders of such an investment company might negatively affect the value of the investment company’s shares. The Fund must pay its pro rata portion of an investment company’s fees and expenses. In addition, ETFs may trade at a premium or discount to the underlying securities’ NAV, which could impact the value of a shareholder’s investment.

Small- and Medium-Sized Companies Risk. There may be less trading in a smaller company’s stock, which means that buy and sell transactions in that stock could have a larger impact on the stock’s price than is the case with larger company stocks. Smaller companies also may have fewer lines of business so that changes in any one line of business may have a greater impact on a smaller company’s stock price than is the case for a larger company. Further, smaller company stocks may perform differently in different cycles than larger company stocks. Accordingly, real estate company shares can, and at times will, perform differently than large company stocks.

Concentration Risk. Although the Fund will not invest in real estate directly, because it concentrates its assets in the real estate industry your investment in the Fund will be closely linked to the performance of the real estate markets and the value of the Fund’s shares may change at different rates compared to the value of shares of a fund with investments in a mix of different industries.

Risk Lose Money [Text]

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Remember, in addition to possibly not achieving your investment goals, you could lose all or a portion of your investment in the Fund over short or even long periods of time.

Risk Nondiversified Status [Text]

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The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV and total returns may fluctuate or fall more than a diversified mutual fund. Gains or losses on a single stock may have a greater impact on the Fund.

Risk Not Insured Depository Institution [Text]

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An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

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Performance information for the Fund is not included because the Fund had not commenced operations prior to the date of this Prospectus. Performance information will be available once the Fund has at least one calendar year of performance. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future and does not guarantee future results. Updated performance information will be available on the Fund’s website at http://mutualfunds.heitman.com or by calling the Fund toll-free at 1‑888‐799‐2944.

Performance One Year or Less [Text]

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Performance information for the Fund is not included because the Fund had not commenced operations prior to the date of this Prospectus.

Performance Availability Phone [Text]

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1‑888‐799‐2944

Performance Availability Website Address [Text]

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http://mutualfunds.heitman.com

Performance Past Does Not Indicate Future [Text]

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The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future and does not guarantee future results.

Heitman US Real Estate Securities Fund | Investor Class

Risk/Return:

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Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

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0.57%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Shareholder Servicing Plan Fees

rr_Component1OtherExpensesOverAssets

0.15%

Other Expenses

rr_OtherExpensesOverAssets

0.46%

^[1]

Total Annual Fund Operating Expenses

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1.43%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.26%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

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1.17%

^[2]

Expense Example, with Redemption, 1 Year

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$ 119

Expense Example, with Redemption, 3 Years

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$ 400

Heitman US Real Estate Securities Fund | Institutional Class

Risk/Return:

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Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.57%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Shareholder Servicing Plan Fees

rr_Component1OtherExpensesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.46%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.03%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.26%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.77%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 79

Expense Example, with Redemption, 3 Years

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$ 275

[1]

"Other Expenses" are estimated for the Fund's current fiscal year.

[2]

Heitman Real Estate Securities LLC (the "Adviser") has contractually agreed to reduce its management fees, and may reimburse the Fund for its operating expenses, in order to ensure that Total Annual Fund Operating Expenses (excluding Rule 12b-1 fees, shareholder servicing fees, redemption fees, swap fees and expenses, taxes, leverage interest, brokerage fees (including commissions, mark-ups and mark-downs), annual account fees for margin accounts, expenses incurred in connection with any merger or reorganization, or extraordinary expenses such as litigation) do not exceed 0.77% of the average daily net assets of the Institutional Class shares of the Fund and 1.02% of the average daily net assets of the Investor Class shares (the "Expense Cap"). The Expense Cap will remain in effect through at least December 31, 2019 and may be terminated at any time upon 60 days' written notice by the Trust's Board of Trustees (the "Board") or the Adviser, with the consent of the Board. The Adviser may request recoupment of previously waived fees and reimbursed expenses from the Fund for three fiscal years from the date they were waived or reimbursed, provided that the Fund is able to make the recoupment without exceeding the lesser of the Expense Cap (i) in effect at the time of the waiver or reimbursement, or (ii) in effect at the time of recoupment.