497

Filed Pursuant to Rule 497(e)

1933 Act File No. 333-174574

1940 Act File No. 811-22563

Mairs & Power Funds Trust

Mairs & Power Balanced Fund

Mairs & Power Small Cap Fund

September 17, 2013

EXPLANATORY NOTE

On behalf of the Mairs & Power Balanced Fund and the Mairs & Power Small Cap Fund, each a series of Mairs & Power Funds Trust (the “Trust”), and pursuant to Rule 497(e) under the Securities Act of 1933, as amended (the “Securities Act”), the purpose of this filing is to submit an interactive data file in the manner provided by Rule 405 of Regulation S-T and General Instruction C.3.(g) of Form N-1A.  The interactive data file included as an exhibit to this filing relates to the Supplement filed with the Securities and Exchange Commission on behalf of the Trust pursuant to Rule 497(e) under the Securities Act on September 3, 2013; such form of Supplement (Accession Number 0000894189-13-005077) is incorporated by reference into this Rule 497 Document.

EXHIBIT LIST

Exhibit	Exhibit No.
Instance Document	EX-101.INS
Schema Document	EX-101.SCH
Calculation Linkbase Document	EX-101.CAL
Definition Linkbase Document	EX-101.DEF
Label Linkbase Document	EX-101.LAB
Presentation Linkbase Document	EX-101.PRE

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

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Mairs & Power Balanced Fund

Objective [Heading]

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Investment Objectives

Objective, Primary [Text Block]

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The objectives of the Mairs & Power Balanced Fund (the Fund) are to provide shareholders with regular current income, the potential for capital appreciation and a moderate level of risk by investing in a diversified portfolio including bonds, preferred stocks, common stocks and other securities convertible into common stock. The objective of the Fund is also to provide a current income yield of at least 25% greater than that of the S&P 500 Index, although there can be no assurance that this objective will be met.

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 and hold shares of the Fund.

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)

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.46% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

5.46%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

The Total Annual Fund Operating Expenses for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

Expense Example [Heading]

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Expense 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 you 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.

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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The Fund emphasizes investments in common stock and other securities convertible into common stock as well as fixed income securities such as corporate bonds and United States government securities. In selecting securities for the Fund, the Fund’s investment adviser, Mairs and Power, Inc. (the Adviser) gives preference to equity holdings in high quality companies, which are characterized by earnings that are reasonably predictable, have a return on equity that is above average, hold market dominance and have financial strength. Some emphasis is given to companies generally located in the Upper Midwest region of the United States and to small and midcap companies (the Adviser defines a small company as a company with less than two billion dollars in market capitalization at the time of initial purchase, and a midcap company has a market capitalization between two and ten billion dollars at the time of initial purchase). The Adviser also gives preference to higher rated investment-grade fixed income securities (rated Baa or better by Moody’s Investors Service). Lower rated convertible and non-convertible debt securities may be purchased if, in the opinion of the Adviser, the potential rewards outweigh the incremental risks. The Fund may invest in mortgage-backed securities. The Fund may also invest in ADRs and other foreign securities. The Fund seeks to keep its assets reasonably fully invested, to maintain modest portfolio turnover rates and to moderate risk by investing in a diversified portfolio of equity and fixed income securities.

The Fund may sell its portfolio securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

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Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

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All investments have risks. The Fund is designed for long-term investors. You should be prepared to accept fluctuations in portfolio value as the Fund seeks to achieve its investment objectives. The Fund cannot provide assurance that it will achieve its objectives. Loss of money is a risk of investing in the Fund. The main risks of investing in the Fund are:

Market Conditions

The Fund’s investments are subject to market risk, which may cause the value of the Fund to decline. Equity securities are generally subject to greater risk than fixed income securities in adverse market conditions. Equity security prices may fluctuate markedly over the short-term due to changing market conditions, interest rate fluctuations and various economic and political factors.

Fund Management

Active management by the Adviser in selecting and maintaining a portfolio of securities that will achieve the Fund’s investment objectives could cause the Fund to underperform compared to other funds having similar investment objectives.

Common Stock

Common stocks held by the Fund will fluctuate in value based on the earnings of the company and on general industry and market conditions. The Fund could lose money if a company in which it invests becomes financially distressed.

Interest Rate Risk

Fixed-rate debt securities are subject to interest rate risk, which is the risk the value of a fixed-rate debt security will decline due to an increase in market interest rates. When interest rates rise, the value of a fixed-rate debt security generally decreases. When interest rates decline, the value of a fixed-rate debt security generally increases. Generally, a debt security with a longer maturity will have greater price volatility as a result of interest rate changes than a debt security with a shorter maturity. Investors in the Fund bear the risk that increases in market interest rates will cause the value of the investment portfolio to decline.

Credit Risk

Fixed income securities are subject to credit risk, which is the risk that the issuer of a debt security will fail to make interest and principal payments when due. Securities issued by the United States government generally are viewed as carrying minimal credit risk. Securities issued by private entities and governmental entities not backed by the full faith and credit of the United States are subject to higher levels of credit risk. Payment defaults could cause the value of the Fund’s investment portfolio to decline.

Maturity Risk

Longer-term securities generally have greater price fluctuations and are more sensitive to interest rate changes than shorter-term securities. Therefore, the Fund may experience greater price fluctuations when it holds securities with longer maturities.

Debt Securities Rated Less than Investment-Grade

These securities have a higher degree of credit risk than investment-grade securities. Companies that issue these lower rated securities (also known as “high yield” or “junk bonds”) are often highly leveraged and traditional methods of financing may not be available to them. Also, market values of lower rated securities may be more sensitive to developments which affect the individual issuer and to general economic conditions.

Call Risk

The Fund invests in corporate bonds, which are subject to call risk. Corporate bonds and some securities issued by United States agencies may be called (redeemed) at the option of the issuer at a specified price before reaching their stated maturity date. If a bond held by the Fund is called during a period of declining interest rates, the Fund will likely reinvest the proceeds received by it at a lower interest rate than that of the called bond, causing a decrease in the Fund’s income.

Government Obligations Risks

No assurance can be given that the U.S. government will provide financial support to U.S. government-sponsored agencies or instrumentalities where it is not obligated to do so by law, such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Securities issued by Fannie Mae and Freddie Mac have historically been supported only by the discretionary authority of the U.S. government. While the U.S. government provides financial support to various U.S. government-sponsored agencies and instrumentalities, such as Fannie Mae and Freddie Mac, no assurance can be given that it will always do so.

Mortgage-Backed Securities

The Fund may invest in mortgage-backed securities, which represent “pools” of mortgages held in trust or in the form of collateralized mortgage obligations.  Mortgage-backed securities are subject to the risk of default on the underlying mortgage.  Mortgage-backed securities are also subject to prepayment risk, which is the risk that the borrower will prepay some or all of the principal owed to the issuer.  If prepayment occurs, the Fund may have to replace the security by investing the proceeds in a less attractive security, which may reduce the Fund’s performance and income distribution. In a period of rising interest rates, these securities may exhibit additional volatility. Mortgage prepayments may slow, causing portfolio securities considered short or intermediate term to become long-term securities which fluctuate more widely in response to interest rates than shorter term securities.

Securities of Foreign Issuers and ADRs

There are certain risks in securities of foreign issuers which are not associated with domestic securities. These risks include political, social or economic instability, difficulty in predicting international trade patterns, taxation and foreign trading practices, and greater fluctuations in price than United States corporations. In addition, there may be less publicly available information about a foreign company than about a United States domiciled company.

Small and Midcap Securities

Small and midcap companies may have a shorter history of operations and be less diversified with respect to their product line. Stocks of these companies tend to be more volatile and less liquid than large company stocks.

Risk Lose Money [Text]

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Loss of money is a risk of investing in the Fund.

Bar Chart and Performance Table [Heading]

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Performance Risk/Return Bar Chart and Table

Performance Narrative [Text Block]

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The following bar chart and table illustrate the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year over a 10-year period. Both the chart and the table assume that all distributions have been reinvested. The Fund is the successor to Mairs and Power Balanced Fund, Inc. (the Predecessor Fund), which was reorganized into the Fund effective December 31, 2011. The performance information for periods before December 31, 2011 reflects the historical performance of the Predecessor Fund. Visit the Fund’s website at www.mairsandpower.com, or call 800-304-7404 for current performance figures. Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table illustrate the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-304-7404

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.mairsandpower.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

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Calendar Year Returns as of December 31

Bar Chart Closing [Text Block]

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During the period shown on the bar chart, the Fund’s best and worst quarters are shown below:

Highest Quarter	2nd Quarter, 2009	13.47%
Lowest Quarter	4th Quarter, 2008	-12.69%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

13.47%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.69%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

The unaudited after-tax returns shown in the table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor's tax situation and may differ from those shown. 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 (IRAs).

Performance Table Narrative

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The following table shows how the Fund’s average annual returns before and after taxes for one, five and ten years compare to those of the S&P 500 Index and a Composite Index. The Composite Index reflects an unmanaged portfolio comprised of 60% S&P 500 Index and 40% Barclays Government/Credit Bond Index, which is composed of high-quality, investment-grade U.S. government and corporate fixed income securities with maturities greater than one year.

The unaudited after-tax returns shown in the table are calculated using the historical highest 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. 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 (IRAs).

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (For the periods ended December 31, 2012)

S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.00%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.66%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.10%

Composite Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Composite Index (reflects no deduction for fees, expenses or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

11.58%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.87%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.66%

Investor Class

Risk/Return:

rr_RiskReturnAbstract

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.15%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

240

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

417

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 930

Annual Return 2003

rr_AnnualReturn2003

21.65%

Annual Return 2004

rr_AnnualReturn2004

12.02%

Annual Return 2005

rr_AnnualReturn2005

4.46%

Annual Return 2006

rr_AnnualReturn2006

12.10%

Annual Return 2007

rr_AnnualReturn2007

4.28%

Annual Return 2008

rr_AnnualReturn2008

(21.12%)

Annual Return 2009

rr_AnnualReturn2009

21.35%

Annual Return 2010

rr_AnnualReturn2010

14.87%

Annual Return 2011

rr_AnnualReturn2011

3.23%

Annual Return 2012

rr_AnnualReturn2012

17.34%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.34%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.90%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.28%

Investor Class | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.55%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.02%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.41%

Investor Class | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

11.64%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.64%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.88%

[1] "Other Expenses" includes Acquired Fund Fees and Expenses, which are indirect fees and expenses that funds incur from investing in the shares of other mutual funds, such as money market funds. The Total Annual Fund Operating Expenses for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

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Mairs & Power Small Cap Fund

Mairs & Power Small Cap Fund

Investment Objective

The objective of the Mairs & Power Small Cap Fund (the Fund) is to seek above-average, long-term appreciation.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Mairs & Power Small Cap Fund Investor Class
Redemption Fee (as a percentage of amount redeemed on shares held for 180 days or less)	1.00%

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

Annual Fund Operating Expenses		Mairs & Power Small Cap Fund Investor Class
Management Fees		0.90%
Other Expenses	[1]	0.84%
Total Annual Fund Operating Expenses		1.74%
Fee Waiver and/or Expense Reimbursement	[2]	(0.48%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.26%

Expense Example

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 you 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 (USD $)	1 year	3 years	5 years	10 years
Mairs & Power Small Cap Fund Investor Class	128	399	799	1,917

Portfolio Turnover

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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 6.93% of the average value of its portfolio.

Principal Investment Strategies

The Fund normally will invest at least 80% of its net assets (including borrowings for investment purposes) in common stocks issued by small cap companies. For this purpose, small cap companies are defined as companies whose market capitalization at the time of purchase come within the range represented by companies in the S&P SmallCap 600 Index as of December 31 of the preceding year. The S&P SmallCap 600 Index is a widely used benchmark for small cap performance and is rebalanced continuously. As of December 31, 2012, the market capitalization ranges for the S&P SmallCap 600 Index were approximately $61 million to $4.0 billion.

In selecting stocks, the Fund’s investment adviser, Mairs and Power, Inc. (the Adviser) gives preference to companies with attractive business niches, strong competitive positions, and the potential to grow revenues, earnings and cash flows consistently over the long-term. Capable management with a track record of prudent capital deployment is also an important consideration. Some emphasis is given to companies generally located in the Upper Midwest region of the United States. The Fund also may invest in common stocks issued by companies with market capitalizations above the range of the S&P SmallCap 600 Index. The Fund may invest up to 25% of its total assets in securities of foreign issuers which are listed on a United States stock exchange or are represented by American Depositary Receipts (ADRs). The Fund seeks to keep its assets reasonably fully invested, to maintain modest portfolio turnover rates, and to mitigate risk by investing in a diversified portfolio of securities.

The Fund may sell its portfolio securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks of Investing in the Fund

All investments have risks. The Fund is designed for long-term investors. You should be prepared to accept fluctuations in portfolio value as the Fund seeks to achieve its investment objective. The Fund cannot provide assurance that it will achieve its objective. Loss of money is a risk of investing in the Fund. The main risks of investing in the Fund are:

Market Conditions

The Fund’s investments are subject to market risk, which may cause the value of the Fund to decline. Equity securities are generally subject to greater risk than fixed income securities in adverse market conditions. Equity security prices may fluctuate markedly over the short-term due to changing market conditions, interest rate fluctuations and various economic and political factors.

Fund Management

Active management by the Adviser in selecting and maintaining a portfolio of securities that will achieve the Fund’s investment objective could cause the Fund to underperform compared to other funds having similar investment objectives.

Common Stock

Common stocks held by the Fund will fluctuate in value based on the earnings of the company and on general industry and market conditions. The Fund could lose money if a company in which it invests becomes financially distressed.

Small Cap Stocks

Generally, companies with smaller market capitalizations have fewer shares traded daily, less liquidity, and greater price volatility than companies with larger market capitalizations. In addition, small cap companies tend to have shorter track records, a more limited product or service base, more limited access to capital, and a greater possibility of failing. These factors increase the risk of investing in small cap companies, as compared to mid cap and large cap companies.

Initial Public Offering (IPO) Risk

This Fund may invest in initial public offerings by small cap companies, which can involve greater risks than investments in companies which are already publicly traded. The companies which make IPOs generally have limited operating histories, and their prospects for future profitability are uncertain. In addition, stock prices of IPOs can be highly unstable due to the absence of a prior public market and other factors.

Securities of Foreign Issuers and ADRs

There are certain risks in securities of foreign issuers which are not associated with domestic securities. These risks include political, social or economic instability, difficulty in predicting international trade patterns, taxation and foreign trading practices, and greater fluctuations in price than United States corporations. In addition, there may be less publicly available information about a foreign company than about a United States domiciled company.

Performance Risk/Return Bar Chart and Table

The following bar chart and table illustrate the risks of investing in the Fund. The bar chart shows the Fund’s performance over a 1-year period. Both the chart and the table assume that all distributions have been reinvested. Visit the Fund’s website at www.mairsandpower.com, or call 800-304-7404 for current performance figures. Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Calendar Year Return as of December 31

During the period shown on the bar chart, the Fund’s best and worst quarters are shown below:

Highest Quarter	1st Quarter, 2012	15.17%
Lowest Quarter	2nd Quarter, 2012	2.17%

Average Annual Total Returns

Average Annual Total Returns (For the periods ended December 31, 2012)

The following table shows how the Fund’s average annual returns before and after taxes for one year and since inception compare to those of the S&P SmallCap 600 Index. The unaudited after-tax returns shown in the table are calculated using the historical highest 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. 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 (IRAs).

Average Annual Returns Mairs & Power Small Cap Fund	Label	Average Annual Returns, 1 Year	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Investor Class	Return Before Taxes	30.60%	31.58%	Aug. 11, 2011
After Taxes on Distributions Investor Class	Return After Taxes on Distributions	30.39%	31.43%
After Taxes on Distributions and Sale of Fund Shares Investor Class	Return After Taxes on Distributions and Sale of Fund Shares	20.14%	27.03%
S&P SmallCap 600 Index (reflects no deduction for fees, expenses or taxes)	S&P SmallCap 600 Index (reflects no deduction for fees, expenses or taxes)	16.33%	19.40%	Aug. 11, 2011

[1] "Other Expenses" includes Acquired Fund Fees and Expenses, which are indirect fees and expenses that funds incur from investing in the shares of other mutual funds, such as money market funds. The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

[2] The Fund's investment adviser has agreed to waive its investment management and fund administration fees and reimburse expenses to the extent necessary to prevent total annual fund operating expenses (excluding interest, taxes, brokerage commissions, Acquired Fund Fees and Expenses, other investment-related costs and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of the Fund's business) from exceeding 1.25% through December 31, 2014. The adviser cannot terminate this arrangement before that date without the agreement of the Fund's board of trustees.

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Mairs & Power Balanced Fund

Mairs & Power Balanced Fund

Investment Objectives

The objectives of the Mairs & Power Balanced Fund (the Fund) are to provide shareholders with regular current income, the potential for capital appreciation and a moderate level of risk by investing in a diversified portfolio including bonds, preferred stocks, common stocks and other securities convertible into common stock. The objective of the Fund is also to provide a current income yield of at least 25% greater than that of the S&P 500 Index, although there can be no assurance that this objective will be met.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (USD $)	Mairs & Power Balanced Fund Investor Class
(fees paid directly from your investment)	none

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

Annual Fund Operating Expenses		Mairs & Power Balanced Fund Investor Class
Management Fees		0.60%
Other Expenses	[1]	0.15%
Total Annual Fund Operating Expenses		0.75%

Expense Example

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 you 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 (USD $)	1 year	3 years	5 years	10 years
Mairs & Power Balanced Fund Investor Class	77	240	417	930

Portfolio Turnover

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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.46% of the average value of its portfolio.

Principal Investment Strategies

The Fund emphasizes investments in common stock and other securities convertible into common stock as well as fixed income securities such as corporate bonds and United States government securities. In selecting securities for the Fund, the Fund’s investment adviser, Mairs and Power, Inc. (the Adviser) gives preference to equity holdings in high quality companies, which are characterized by earnings that are reasonably predictable, have a return on equity that is above average, hold market dominance and have financial strength. Some emphasis is given to companies generally located in the Upper Midwest region of the United States and to small and midcap companies (the Adviser defines a small company as a company with less than two billion dollars in market capitalization at the time of initial purchase, and a midcap company has a market capitalization between two and ten billion dollars at the time of initial purchase). The Adviser also gives preference to higher rated investment-grade fixed income securities (rated Baa or better by Moody’s Investors Service). Lower rated convertible and non-convertible debt securities may be purchased if, in the opinion of the Adviser, the potential rewards outweigh the incremental risks. The Fund may invest in mortgage-backed securities. The Fund may also invest in ADRs and other foreign securities. The Fund seeks to keep its assets reasonably fully invested, to maintain modest portfolio turnover rates and to moderate risk by investing in a diversified portfolio of equity and fixed income securities.

The Fund may sell its portfolio securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks of Investing in the Fund

All investments have risks. The Fund is designed for long-term investors. You should be prepared to accept fluctuations in portfolio value as the Fund seeks to achieve its investment objectives. The Fund cannot provide assurance that it will achieve its objectives. Loss of money is a risk of investing in the Fund. The main risks of investing in the Fund are:

Market Conditions

The Fund’s investments are subject to market risk, which may cause the value of the Fund to decline. Equity securities are generally subject to greater risk than fixed income securities in adverse market conditions. Equity security prices may fluctuate markedly over the short-term due to changing market conditions, interest rate fluctuations and various economic and political factors.

Fund Management

Active management by the Adviser in selecting and maintaining a portfolio of securities that will achieve the Fund’s investment objectives could cause the Fund to underperform compared to other funds having similar investment objectives.

Common Stock

Common stocks held by the Fund will fluctuate in value based on the earnings of the company and on general industry and market conditions. The Fund could lose money if a company in which it invests becomes financially distressed.

Interest Rate Risk

Fixed-rate debt securities are subject to interest rate risk, which is the risk the value of a fixed-rate debt security will decline due to an increase in market interest rates. When interest rates rise, the value of a fixed-rate debt security generally decreases. When interest rates decline, the value of a fixed-rate debt security generally increases. Generally, a debt security with a longer maturity will have greater price volatility as a result of interest rate changes than a debt security with a shorter maturity. Investors in the Fund bear the risk that increases in market interest rates will cause the value of the investment portfolio to decline.

Credit Risk

Fixed income securities are subject to credit risk, which is the risk that the issuer of a debt security will fail to make interest and principal payments when due. Securities issued by the United States government generally are viewed as carrying minimal credit risk. Securities issued by private entities and governmental entities not backed by the full faith and credit of the United States are subject to higher levels of credit risk. Payment defaults could cause the value of the Fund’s investment portfolio to decline.

Maturity Risk

Longer-term securities generally have greater price fluctuations and are more sensitive to interest rate changes than shorter-term securities. Therefore, the Fund may experience greater price fluctuations when it holds securities with longer maturities.

Debt Securities Rated Less than Investment-Grade

These securities have a higher degree of credit risk than investment-grade securities. Companies that issue these lower rated securities (also known as “high yield” or “junk bonds”) are often highly leveraged and traditional methods of financing may not be available to them. Also, market values of lower rated securities may be more sensitive to developments which affect the individual issuer and to general economic conditions.

Call Risk

The Fund invests in corporate bonds, which are subject to call risk. Corporate bonds and some securities issued by United States agencies may be called (redeemed) at the option of the issuer at a specified price before reaching their stated maturity date. If a bond held by the Fund is called during a period of declining interest rates, the Fund will likely reinvest the proceeds received by it at a lower interest rate than that of the called bond, causing a decrease in the Fund’s income.

Government Obligations Risks

No assurance can be given that the U.S. government will provide financial support to U.S. government-sponsored agencies or instrumentalities where it is not obligated to do so by law, such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Securities issued by Fannie Mae and Freddie Mac have historically been supported only by the discretionary authority of the U.S. government. While the U.S. government provides financial support to various U.S. government-sponsored agencies and instrumentalities, such as Fannie Mae and Freddie Mac, no assurance can be given that it will always do so.

Mortgage-Backed Securities

The Fund may invest in mortgage-backed securities, which represent “pools” of mortgages held in trust or in the form of collateralized mortgage obligations.  Mortgage-backed securities are subject to the risk of default on the underlying mortgage.  Mortgage-backed securities are also subject to prepayment risk, which is the risk that the borrower will prepay some or all of the principal owed to the issuer.  If prepayment occurs, the Fund may have to replace the security by investing the proceeds in a less attractive security, which may reduce the Fund’s performance and income distribution. In a period of rising interest rates, these securities may exhibit additional volatility. Mortgage prepayments may slow, causing portfolio securities considered short or intermediate term to become long-term securities which fluctuate more widely in response to interest rates than shorter term securities.

Securities of Foreign Issuers and ADRs

There are certain risks in securities of foreign issuers which are not associated with domestic securities. These risks include political, social or economic instability, difficulty in predicting international trade patterns, taxation and foreign trading practices, and greater fluctuations in price than United States corporations. In addition, there may be less publicly available information about a foreign company than about a United States domiciled company.

Small and Midcap Securities

Small and midcap companies may have a shorter history of operations and be less diversified with respect to their product line. Stocks of these companies tend to be more volatile and less liquid than large company stocks.

Performance Risk/Return Bar Chart and Table

The following bar chart and table illustrate the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year over a 10-year period. Both the chart and the table assume that all distributions have been reinvested. The Fund is the successor to Mairs and Power Balanced Fund, Inc. (the Predecessor Fund), which was reorganized into the Fund effective December 31, 2011. The performance information for periods before December 31, 2011 reflects the historical performance of the Predecessor Fund. Visit the Fund’s website at www.mairsandpower.com, or call 800-304-7404 for current performance figures. Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Calendar Year Returns as of December 31

During the period shown on the bar chart, the Fund’s best and worst quarters are shown below:

Highest Quarter	2nd Quarter, 2009	13.47%
Lowest Quarter	4th Quarter, 2008	-12.69%

Average Annual Total Returns

Average Annual Total Returns (For the periods ended December 31, 2012)

The following table shows how the Fund’s average annual returns before and after taxes for one, five and ten years compare to those of the S&P 500 Index and a Composite Index. The Composite Index reflects an unmanaged portfolio comprised of 60% S&P 500 Index and 40% Barclays Government/Credit Bond Index, which is composed of high-quality, investment-grade U.S. government and corporate fixed income securities with maturities greater than one year.

The unaudited after-tax returns shown in the table are calculated using the historical highest 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. 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 (IRAs).

Average Annual Returns Mairs & Power Balanced Fund	Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Investor Class	Return Before Taxes	17.34%	5.90%	8.28%
After Taxes on Distributions Investor Class	Return After Taxes on Distributions	16.55%	5.02%	7.41%
After Taxes on Distributions and Sale of Fund Shares Investor Class	Return After Taxes on Distributions and Sale of Fund Shares	11.64%	4.64%	6.88%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)	S&P 500 Index (reflects no deduction for fees, expenses or taxes)	16.00%	1.66%	7.10%
Composite Index (reflects no deduction for fees, expenses or taxes)	Composite Index (reflects no deduction for fees, expenses or taxes)	11.58%	3.87%	6.66%

[1] "Other Expenses" includes Acquired Fund Fees and Expenses, which are indirect fees and expenses that funds incur from investing in the shares of other mutual funds, such as money market funds. The Total Annual Fund Operating Expenses for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Apr. 30, 2013

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Mairs & Power Small Cap Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The objective of the Mairs & Power Small Cap Fund (the Fund) is to seek above-average, long-term 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 and hold shares of the Fund.

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

2014-12-31

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 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 6.93% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

6.93%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense 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 you 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.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

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

The Fund normally will invest at least 80% of its net assets (including borrowings for investment purposes) in common stocks issued by small cap companies. For this purpose, small cap companies are defined as companies whose market capitalization at the time of purchase come within the range represented by companies in the S&P SmallCap 600 Index as of December 31 of the preceding year. The S&P SmallCap 600 Index is a widely used benchmark for small cap performance and is rebalanced continuously. As of December 31, 2012, the market capitalization ranges for the S&P SmallCap 600 Index were approximately $61 million to $4.0 billion.

In selecting stocks, the Fund’s investment adviser, Mairs and Power, Inc. (the Adviser) gives preference to companies with attractive business niches, strong competitive positions, and the potential to grow revenues, earnings and cash flows consistently over the long-term. Capable management with a track record of prudent capital deployment is also an important consideration. Some emphasis is given to companies generally located in the Upper Midwest region of the United States. The Fund also may invest in common stocks issued by companies with market capitalizations above the range of the S&P SmallCap 600 Index. The Fund may invest up to 25% of its total assets in securities of foreign issuers which are listed on a United States stock exchange or are represented by American Depositary Receipts (ADRs). The Fund seeks to keep its assets reasonably fully invested, to maintain modest portfolio turnover rates, and to mitigate risk by investing in a diversified portfolio of securities.

The Fund may sell its portfolio securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

All investments have risks. The Fund is designed for long-term investors. You should be prepared to accept fluctuations in portfolio value as the Fund seeks to achieve its investment objective. The Fund cannot provide assurance that it will achieve its objective. Loss of money is a risk of investing in the Fund. The main risks of investing in the Fund are:

Market Conditions

The Fund’s investments are subject to market risk, which may cause the value of the Fund to decline. Equity securities are generally subject to greater risk than fixed income securities in adverse market conditions. Equity security prices may fluctuate markedly over the short-term due to changing market conditions, interest rate fluctuations and various economic and political factors.

Fund Management

Active management by the Adviser in selecting and maintaining a portfolio of securities that will achieve the Fund’s investment objective could cause the Fund to underperform compared to other funds having similar investment objectives.

Common Stock

Common stocks held by the Fund will fluctuate in value based on the earnings of the company and on general industry and market conditions. The Fund could lose money if a company in which it invests becomes financially distressed.

Small Cap Stocks

Generally, companies with smaller market capitalizations have fewer shares traded daily, less liquidity, and greater price volatility than companies with larger market capitalizations. In addition, small cap companies tend to have shorter track records, a more limited product or service base, more limited access to capital, and a greater possibility of failing. These factors increase the risk of investing in small cap companies, as compared to mid cap and large cap companies.

Initial Public Offering (IPO) Risk

This Fund may invest in initial public offerings by small cap companies, which can involve greater risks than investments in companies which are already publicly traded. The companies which make IPOs generally have limited operating histories, and their prospects for future profitability are uncertain. In addition, stock prices of IPOs can be highly unstable due to the absence of a prior public market and other factors.

Securities of Foreign Issuers and ADRs

There are certain risks in securities of foreign issuers which are not associated with domestic securities. These risks include political, social or economic instability, difficulty in predicting international trade patterns, taxation and foreign trading practices, and greater fluctuations in price than United States corporations. In addition, there may be less publicly available information about a foreign company than about a United States domiciled company.

Risk Lose Money [Text]

rr_RiskLoseMoney

Loss of money is a risk of investing in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Risk/Return Bar Chart and Table

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table illustrate the risks of investing in the Fund. The bar chart shows the Fund’s performance over a 1-year period. Both the chart and the table assume that all distributions have been reinvested. Visit the Fund’s website at www.mairsandpower.com, or call 800-304-7404 for current performance figures. Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table illustrate the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-304-7404

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.mairsandpower.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance of the Fund, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Return as of December 31

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the period shown on the bar chart, the Fund’s best and worst quarters are shown below:

Highest Quarter	1st Quarter, 2012	15.17%
Lowest Quarter	2nd Quarter, 2012	2.17%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.17%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

2.17%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

The unaudited after-tax returns shown in the table are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor's tax situation and may differ from those shown. 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 (IRAs).

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows how the Fund’s average annual returns before and after taxes for one year and since inception compare to those of the S&P SmallCap 600 Index. The unaudited after-tax returns shown in the table are calculated using the historical highest 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. 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 (IRAs).

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (For the periods ended December 31, 2012)

S&P SmallCap 600 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

S&P SmallCap 600 Index (reflects no deduction for fees, expenses or taxes)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

16.33%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

19.40%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 11, 2011

Investor Class

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.90%

Other Expenses

rr_OtherExpensesOverAssets

0.84%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.74%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.48%)

^[2]

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

rr_NetExpensesOverAssets

1.26%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 128

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

399

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

799

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,917

Annual Return 2012

rr_AnnualReturn2012

30.60%

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

30.60%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

31.58%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 11, 2011

Investor Class | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

30.39%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

31.43%

Investor Class | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

20.14%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

27.03%

[1] "Other Expenses" includes Acquired Fund Fees and Expenses, which are indirect fees and expenses that funds incur from investing in the shares of other mutual funds, such as money market funds. The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the Fund in the table above differs from the Ratio of Expenses to Average Net Assets found within the "Financial Highlights" section of the prospectus because the audited information in the "Financial Highlights" reflects the operating expenses and does not include indirect expenses such as Acquired Fund Fees and Expenses, which was 0.01% for the fiscal year ended December 31, 2012.

[2] The Fund's investment adviser has agreed to waive its investment management and fund administration fees and reimburse expenses to the extent necessary to prevent total annual fund operating expenses (excluding interest, taxes, brokerage commissions, Acquired Fund Fees and Expenses, other investment-related costs and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of the Fund's business) from exceeding 1.25% through December 31, 2014. The adviser cannot terminate this arrangement before that date without the agreement of the Fund's board of trustees.

XML

Document and Entity Information	0 Months Ended
	Sep. 03, 2013
Risk/Return:
Document Type	497
Document Period End Date	Sep. 03, 2013
Registrant Name	Mairs & Power Funds Trust
Central Index Key	0001521353
Amendment Flag	false
Document Creation Date	Sep. 03, 2013
Document Effective Date	Sep. 03, 2013
Prospectus Date	Apr. 30, 2013
Mairs & Power Balanced Fund | Investor Class
Risk/Return:
Trading Symbol	MAPOX
Mairs & Power Small Cap Fund | Investor Class
Risk/Return:
Trading Symbol	MSCFX