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 Annual Fund Operating Expenses or in the example, affect the Fund’s performance.

Other Expenses, New Fund, Based on Estimates

rr_OtherExpensesNewFundBasedOnEstimates

Because the Fund is new, these expenses are based on estimated amounts for the Fund’s current fiscal year.

Expense Example, Heading

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Example .

Expense Example, Narrative

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

Expense Example, By Year, Caption

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

Investment Strategy, Heading

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Principal Investment Strategies

Investment Strategy, Narrative

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Under normal circumstances, at least 80% of the Fund’s net assets are invested in equity securities of mid-capitalization companies. The Fund will generally not initiate a position in a company unless it has a market capitalization between $1 and $15 billion. The median market capitalization of the Fund is expected to fluctuate over time depending on Heartland Advisors’ perceptions of relative valuations, future prospects, and market conditions.

The Fund invests primarily in a concentrated number (generally 30 to 60) of mid-capitalization equity securities selected on a value basis and whose current market prices, in Heartland Advisors’ judgment, are undervalued relative to their intrinsic value. A majority of its assets are generally invested in dividend-paying common stocks.

The Fund utilizes Heartland Advisors’ disciplined and time-tested 10 Principles of Value Investing^TM framework to identify securities with the potential for appreciation and a potential margin of safety to limit downside risk. The 10 Principles of Value Investing™ are: catalyst for recognition, low price in relation to earnings, low price in relation to cash flow, low price in relation to book value, financial soundness, positive earnings dynamics, sound business strategy, capable management and insider ownership, value of the company, and positive technical analysis.

The Fund’s primary benchmark against which it will measure performance will be the Russell Midcap® Value Index.

Risk, Heading

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Principal Risks

Risk, Narrative

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The Fund is designed for investors who seek long-term capital appreciation from mid-capitalization stocks that may produce modest dividend income to the Fund. It is constructed as a core value holding for investors who can accept the volatility and other investment risks of the broad-based equity markets, but want to manage these risks by investing in companies believed to be undervalued relative to their intrinsic value.

The principal risk of investing in the Fund is that its share price and investment return will fluctuate, and you could lose money. Additional principal investment risks of the Fund include:

New Fund Risk. There can be no assurance that the Fund will grow to or maintain an economically viable size.

Management Risk. The ability of the Fund to meet its investment objective is directly related to Heartland Advisors’ investment strategies for the Fund.

General Market Risk. The market value of a security may move up or down, sometimes rapidly and unpredictably. These fluctuations may cause a security to be worth less than the price originally paid for it, or less than it was worth at an earlier time.

Equity Market Risk. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change.

Value-Style Investing Risk. Value stocks can perform differently from the market as a whole and from other types of stocks. Value investments are subject to the risk that their intrinsic value may not be recognized by the broad market.

SMALLER COMPANY SECURITIES risk. Equity securities of the smaller companies in which the Fund may invest generally involve a higher degree of risk than investments in the broad-based equity markets. The security prices of smaller companies generally are more volatile than those of larger companies, they generally will have less market liquidity, and they may be more likely to be adversely affected by poor economic or market conditions.

Limited Portfolio Risk. As the Fund invests in a limited number of stocks, a change in the value of any single holding may have a more pronounced effect on the Fund’s net asset value (“NAV”) and performance than would be the case if it held more positions. This generally will increase the volatility of the Fund’s NAV and investment return.

An investment in the Fund is not a deposit of a bank, nor insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other governmental agency. It is not designed to be a complete investment program, and while you may make money, you can also lose money. The Fund’s share price will fluctuate.

Risk, Lose Money

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The principal risk of investing in the Fund is that its share price and investment return will fluctuate, and you could lose money.

Bar Chart and Performance Table, Heading

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Past PeRformance

Performance, Narrative

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Performance information for the Fund has not been presented because, as of the date of this Prospectus, the Fund has not been in operation for a full calendar year.

Performance One Year or Less

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Performance information for the Fund has not been presented because, as of the date of this Prospectus, the Fund has not been in operation for a full calendar year.

HEARTLAND MID CAP VALUE FUND (Prospectus Summary) | HEARTLAND MID CAP VALUE FUND | Institutional Class Shares

Risk/Return:

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Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load)

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none

Maximum Sales Charge (Load) Imposed on Reinvested Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee (as a percentage of the net asset value of any shares that are redeemed or exchanged within 10 days after they were purchased)

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2.00%

Exchange Fee

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none

Management Fees

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0.75%

Distribution (12b-1) Fees

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none

Other Expenses

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0.99%

^[1]

Total Annual Fund Operating Expenses

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1.74%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.75%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.99%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2017

Expense Example, with Redemption, 1 Year

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101

Expense Example, with Redemption, 3 Years

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315

HEARTLAND MID CAP VALUE FUND (Prospectus Summary) | HEARTLAND MID CAP VALUE FUND | Investor Class Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Maximum Sales Charge (Load) Imposed on Reinvested Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee (as a percentage of the net asset value of any shares that are redeemed or exchanged within 10 days after they were purchased)

rr_RedemptionFeeOverRedemption

2.00%

Exchange Fee

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none

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.99%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.99%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.74%)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.25%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2017

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

127

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 396

[1]

Because the Fund is new, these expenses are based on estimated amounts for the Fund’s current fiscal year.

[2]

Pursuant to an operating expense limitation agreement between Heartland Advisors, Inc. (“Heartland Advisors” or “the Advisor”) and the Fund, Heartland Advisors has agreed to waive its management fees and/or pay expenses of the Fund to ensure that the Fund’s total annual fund operating expenses (excluding front-end or contingent deferred sales loads, taxes, leverage, interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, dividends or interest expenses on short positions, acquired fund fees and expenses, or extraordinary expenses) do not exceed 1.25% of the Fund’s average net assets for the Investor Class Shares and 0.99% for the Institutional Class Shares through at least October 31, 2017, and subject to annual re-approval of the agreement by the Board of Directors, thereafter. This operating expense limitation agreement can be terminated only by, or with the consent of, the Board of Directors.