v3.25.3
Investment Risks - Allspring Municipal Fixed Income Funds
Jun. 30, 2025
California Limited-Term Tax-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
California Limited-Term Tax-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
California Limited-Term Tax-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets
are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
California Limited-Term Tax-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
California Limited-Term Tax-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
California Limited-Term Tax-Free Fund | State Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund’s shares.
California Limited-Term Tax-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
California Limited-Term Tax-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
California Limited-Term Tax-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
California Limited-Term Tax-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
California Limited-Term Tax-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
California Tax-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
California Tax-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
California Tax-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
California Tax-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
California Tax-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
California Tax-Free Fund | State Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund’s shares.
California Tax-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
California Tax-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
California Tax-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
California Tax-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
California Tax-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
High Yield Municipal Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
High Yield Municipal Bond Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
High Yield Municipal Bond Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
High Yield Municipal Bond Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
High Yield Municipal Bond Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
High Yield Municipal Bond Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
High Yield Municipal Bond Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
High Yield Municipal Bond Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
High Yield Municipal Bond Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
High Yield Municipal Bond Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Intermediate Tax/AMT-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Intermediate Tax/AMT-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Intermediate Tax/AMT-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Intermediate Tax/AMT-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Intermediate Tax/AMT-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a
way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Intermediate Tax/AMT-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Intermediate Tax/AMT-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Intermediate Tax/AMT-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Intermediate Tax/AMT-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Intermediate Tax/AMT-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Minnesota Tax-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Minnesota Tax-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Minnesota Tax-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Minnesota Tax-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline,
interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Minnesota Tax-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Minnesota Tax-Free Fund | State Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund’s shares.
Minnesota Tax-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Minnesota Tax-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Minnesota Tax-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Minnesota Tax-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Minnesota Tax-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Municipal Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Municipal Bond Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Municipal Bond Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Municipal Bond Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Municipal Bond Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Municipal Bond Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Municipal Bond Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Municipal Bond Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Municipal Bond Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Municipal Bond Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Pennsylvania Tax-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Pennsylvania Tax-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Pennsylvania Tax-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Pennsylvania Tax-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Pennsylvania Tax-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Pennsylvania Tax-Free Fund | State Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund’s shares.
Pennsylvania Tax-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Pennsylvania Tax-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Pennsylvania Tax-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Pennsylvania Tax-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Pennsylvania Tax-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Short-Term Municipal Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Short-Term Municipal Bond Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Short-Term Municipal Bond Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Short-Term Municipal Bond Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Short-Term Municipal Bond Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Short-Term Municipal Bond Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Short-Term Municipal Bond Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Short-Term Municipal Bond Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Short-Term Municipal Bond Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Short-Term Municipal Bond Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Strategic Municipal Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Strategic Municipal Bond Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Strategic Municipal Bond Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Strategic Municipal Bond Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund
to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Strategic Municipal Bond Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Strategic Municipal Bond Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Strategic Municipal Bond Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Strategic Municipal Bond Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Strategic Municipal Bond Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Strategic Municipal Bond Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Ultra Short-Term Municipal Income Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Ultra Short-Term Municipal Income Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Ultra Short-Term Municipal Income Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Ultra Short-Term Municipal Income Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer
the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Ultra Short-Term Municipal Income Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Ultra Short-Term Municipal Income Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Ultra Short-Term Municipal Income Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Ultra Short-Term Municipal Income Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Ultra Short-Term Municipal Income Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Wisconsin Tax-Free Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money
Wisconsin Tax-Free Fund | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund may lose money,  is not a deposit of a bank or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Wisconsin Tax-Free Fund | Risk Nondiversified Status [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Non-Diversification Risk. A Fund that is considered “non-diversified” under the Investment Company Act of 1940, as amended, is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a “diversified” fund. Default by the issuer of an individual security in such a Fund’s portfolio may have a greater negative effect on the Fund’s return or net asset value than it would on the return or net asset value of a “diversified” fund.
Wisconsin Tax-Free Fund | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk. The values of, and/or the income generated by, securities held by the Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Securities markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.
Wisconsin Tax-Free Fund | Debt Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Debt Securities Risk. Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay principal when they become due. In these instances, the value of an investment could decline and the Fund could lose money. Credit risk increases as an issuer’s credit quality or financial strength declines. Interest rate risk is the possibility that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer
the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative interest rates may magnify interest rate risk.
Wisconsin Tax-Free Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Wisconsin Tax-Free Fund | State Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund’s shares.
Wisconsin Tax-Free Fund | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.
Wisconsin Tax-Free Fund | Futures Contracts Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at times not be a liquid secondary market for certain futures contracts.
Wisconsin Tax-Free Fund | High Yield Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are considered speculative and have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.
Wisconsin Tax-Free Fund | Inverse Floater Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund’s losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.
Wisconsin Tax-Free Fund | Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Management Risk. Investment decisions,  techniques, analyses or models implemented by a Fund’s manager or sub-adviser in seeking to achieve the Fund’s investment objective may not produce expected returns, may cause the Fund’s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.
Wisconsin Tax-Free Fund | Puerto Rico Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Puerto Rico Municipal Securities Risk. Events in Puerto Rico are likely to affect a Fund’s investments in Puerto Rico municipal securities. The majority of Puerto Rico’s debt is issued by the major public agencies that are responsible for many of the island’s public functions, such as water, wastewater, highways, electricity, education and public construction. Certain risks specific to Puerto Rico include persistent budget deficits and related fiscal and financial challenges, a high unemployment rate, and significant underfunded pension liabilities.