Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Entity Central Index Key

dei_EntityCentralIndexKey

0000809586

HEARTLAND VALUE FUND (Prospectus Summary) | HEARTLAND VALUE FUND

Risk/Return:

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Risk/Return, Heading

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HEARTLAND VALUE FUND

Investment Objective, Heading

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Investment Goal

Investment Objective, Primary

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The Value Fund seeks long-term capital appreciation through investing in small companies.

Expense, Heading

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FEES AND EXPENSES OF THE VALUE FUND

Expense, Narrative

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This table describes the fees and expenses that you may pay if you buy and hold Investor or Institutional Class Shares of the Value Fund.

Shareholder Fees, Caption

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Shareholder Fees (fees paid directly from your investment)

Operating Expenses, Caption

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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover, Heading

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Portfolio Turnover

Portfolio Turnover

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The Value 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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 38% of the average value of its portfolio.

Portfolio Turnover, Rate

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38.00%

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 Value 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 of the Value Fund

Investment Strategy, Narrative

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The Value Fund invests primarily in common stocks of small companies with market capitalizations of less than $2 billion selected on a value basis, and may invest a significant portion of its assets in micro-capitalization securities, i.e., those with market capitalizations of less than $300 million at the time of purchase.

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.

Risk, Heading

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Principal Risks of investing in the value fund

Risk, Narrative

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The Value Fund is designed for investors who seek long-term capital appreciation from small company stocks. It is designed for investors who can tolerate the greater investment risk and market volatility associated with smaller companies, 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 Value Fund is that its share price and investment return will fluctuate, and you could lose money. Additional principal investment risks of the Fund include:

- 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.

An investment in a 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. Each Fund’s share price will fluctuate.

Risk, Lose Money

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

Risk, Nondiversified Status

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An investment in a Fund is not a deposit of a bank, nor insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other governmental agency.

Bar Chart and Performance Table, Heading

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Past Performance

Performance, Narrative

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The following tables show historical performance of the Value Fund and provide some indication of the risks of investing in the Fund. Table I shows how the total returns before taxes for the Fund’s Investor Class Shares have varied from year to year for the past 10 years. Table II shows how the Fund’s average annual total returns compare to those of a securities market index. Performance information for the Institutional Class Shares prior to May 1, 2008 is based on the performance of the Investor Class. Past performance (before and after taxes) does not guarantee future results. Recent performance information for the Fund is available on the Fund’s website at heartlandfunds.com or by calling 1-800-432-7856.

Performance, Information Illustrates Variability of Returns

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The following tables show historical performance of the Value Fund and provide some indication of the risks of investing in the Fund.

Performance, Availability Phone Number

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1-800-432-7856

Performance, Availability Website Address

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www.heartlandfunds.com

Performance, Past Does Not Indicate Future

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Past performance (before and after taxes) does not guarantee future results.

Bar Chart, Heading

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TABLE I Value Fund - Investor Class Shares - Year-by-Year Total Returns

Bar Chart, Closing

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Best Quarter:	Worst Quarter:
2nd Quarter 2009….31.26%	4th Quarter of 2008 . . . .- 26.76 %

Performance Table Heading

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TABLE II Value Fund - Average Annual Total Returns [for the periods ended 12/31/14]

Index No Deduction for Fees, Expenses, Taxes

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reflects no deduction for fees, expenses or taxes

Performance Table, Uses Highest Federal Rate

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After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table, Not Relevant to Tax Deferred

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Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Performance Table, One Class of after Tax Shown

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In addition, after-tax returns are shown only for Investor Class Shares and after-tax returns for the Institutional Class Shares will vary.

Performance Table, Closing

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After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In addition, after-tax returns are shown only for Investor Class Shares and after-tax returns for the Institutional Class Shares will vary. The differences in before-tax returns and after-tax returns on distributions and sale of Fund shares are due to adjustments incorporated into the after-tax returns for qualified taxable dividend income and qualifying foreign tax credits.

In some instances, the after-tax return on distributions and sale of Fund shares may be higher than other return figures when Fund shares are sold at a loss that provides an assumed tax benefit to the shareholder.

HEARTLAND VALUE FUND (Prospectus Summary) | HEARTLAND VALUE FUND | Russell 2000® Value Index

Risk/Return:

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Average Annual Returns, Label

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Russell 2000 ^® Value Index (reflects no deduction for fees, expenses or taxes)

Average Annual Returns, 1 Year

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4.22%

Average Annual Returns, 5 Years

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14.26%

Average Annual Returns,10 Years

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6.89%

Average Annual Returns, Since Inception

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10.32%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 28, 1984

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

Risk/Return:

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Maximum Sales Charge (Load) Imposed on Purchases

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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)

rr_RedemptionFeeOverRedemption

2.00%

Exchange Fee

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none

Management Fees

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0.75%

Distribution (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.16%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

Total Annual Fund Operating Expenses

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1.07%

Expense Example, with Redemption, 1 Year

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109

Expense Example, with Redemption, 3 Years

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340

Expense Example, with Redemption, 5 Years

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590

Expense Example, with Redemption, 10 Years

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1,304

Annual Return 2005

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1.99%

Annual Return 2006

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28.02%

Annual Return 2007

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(5.53%)

Annual Return 2008

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(39.53%)

Annual Return 2009

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44.49%

Annual Return 2010

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21.28%

Annual Return 2011

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(6.92%)

Annual Return 2012

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13.83%

Annual Return 2013

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32.11%

Annual Return 2014

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2.22%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

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31.26%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Dec. 31, 2008

Lowest Quarterly Return

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(26.76%)

Average Annual Returns, Label

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Return Before Taxes

Average Annual Returns, 1 Year

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2.22%

Average Annual Returns, 5 Years

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11.65%

Average Annual Returns,10 Years

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6.46%

Average Annual Returns, Since Inception

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12.67%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 28, 1984

HEARTLAND VALUE FUND (Prospectus Summary) | HEARTLAND VALUE FUND | Investor Class Shares | After Taxes on Distributions

Risk/Return:

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Average Annual Returns, Label

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Return After Taxes on Distributions

Average Annual Returns, 1 Year

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(0.84%)

Average Annual Returns, 5 Years

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9.87%

Average Annual Returns,10 Years

rr_AverageAnnualReturnYear10

4.96%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

10.78%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 28, 1984

HEARTLAND VALUE FUND (Prospectus Summary) | HEARTLAND VALUE FUND | Investor Class Shares | After Taxes on Distributions and Sales

Risk/Return:

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Average Annual Returns, Label

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Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

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3.12%

Average Annual Returns, 5 Years

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9.17%

Average Annual Returns,10 Years

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5.16%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

10.55%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 28, 1984

HEARTLAND VALUE FUND (Prospectus Summary) | HEARTLAND 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)

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

none

Other Expenses

rr_OtherExpensesOverAssets

0.16%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.91%

Expense Example, with Redemption, 1 Year

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93

Expense Example, with Redemption, 3 Years

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290

Expense Example, with Redemption, 5 Years

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504

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,119

Average Annual Returns, Label

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Return Before Taxes

Average Annual Returns, 1 Year

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2.38%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

11.85%

Average Annual Returns,10 Years

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6.61%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

12.72%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 28, 1984