Investment Risks |
Jun. 30, 2026 |
|---|---|
| Osterweis Fund | Equity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Risk: Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value. These fluctuations may cause a security to be worth less than its cost when originally purchased or less than it was worth at an earlier time. |
| Osterweis Fund | Large Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Company Risk: Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. Also, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion. |
| Osterweis Fund | Small And Medium Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small and Medium Company Risk: Investing in securities of small- and medium-sized companies, even indirectly, may involve greater volatility than investing in larger and more established companies. |
| Osterweis Fund | Economic And Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Economic and Market Risk: Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs, and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. |
| Osterweis Fund | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: The risk that the Adviser may fail to implement the Fund’s investment strategies and meet its investment objective. |
| Osterweis Fund | Below Investment Grade Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Below Investment Grade Securities Risk: Investing in fixed income securities that are rated below investment grade involves risks such as increased possibility of default, decreased liquidity of the security and changes in value based on public perception of the issuer. |
| Osterweis Fund | Convertible Security Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Convertible Security Risk: As with a straight debt security, a convertible security tends to increase in market value when interest rates decline and decrease in value when interest rates rise. Like a common stock, the value of a convertible security also tends to increase as the market value of the underlying stock rises, and it tends to decrease as the market value of the underlying stock declines. |
| Osterweis Fund | Currency Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk: Fluctuations in currency exchange rates may adversely affect the value of the Fund’s investments in foreign securities as well as the value of the Fund’s investments in domestic securities whose issuers earn at least a portion of their revenue in foreign currency. |
| Osterweis Fund | Debt Securities Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risks: ◦Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. ◦Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. ◦Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. ◦Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. ◦Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund.
|
| Osterweis Fund | Debt Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. |
| Osterweis Fund | Debt Securities Risk, Defaulted Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. |
| Osterweis Fund | Debt Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. |
| Osterweis Fund | Debt Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. |
| Osterweis Fund | Debt Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund. |
| Osterweis Fund | Foreign Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities: Investing in foreign securities, including depositary receipts, may involve increased risks due to political, social and economic developments abroad, and differences between United States and foreign regulatory practices. Given the global interrelationships of today’s economy, volatility or threats to stability of any significant currency, such as occurred in the recent past with the European Monetary Union, or significant political instability, may affect other markets and affect the risk of an investment in the Fund. |
| Osterweis Fund | Emerging Markets Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Risk: Emerging markets may involve greater risk and volatility than more developed markets. Some emerging markets countries may have fixed or managed currencies that are not free-floating against the U.S. dollar. Certain of these currencies have experienced, and may experience in the future, substantial fluctuations or a steady devaluation relative to the U.S. dollar. |
| Osterweis Fund | Liquidity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk: Securities purchased by the Fund may become illiquid particularly during periods of market turbulence. Illiquid investments may be more difficult to trade and value than liquid ones and, if the Fund is forced to sell these investments promptly to meet redemption requests or for other needs, the Fund may incur a loss. |
| Osterweis Fund | Master Limited Partnership Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Master Limited Partnership Risk: Investments held by an MLP may be relatively illiquid, limiting the MLP’s ability to vary its portfolio promptly in response to changes in economic or other conditions. In addition, MLPs may have limited financial resources, their securities may trade infrequently and in limited volume and they may be subject to more abrupt or erratic price movements than securities of larger or more broadly-based companies. The risks of investing in an MLP are generally those inherent in investing in a partnership as opposed to a corporation. For example, state law governing partnerships is often less restrictive than state law governing corporations. Accordingly, there may be fewer protections afforded investors in an MLP than investors in a corporation. Additional risks involved with investing in an MLP are risks associated with the specific industry or industries in which the partnership invests, such as the risks of investing in real estate or oil and gas industries. |
| Osterweis Fund | Sector Emphasis Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Emphasis Risk: The Fund, from time to time, may invest 25% or more of its assets in one or more sectors subjecting the Fund to sector emphasis risk. This is the risk that the Fund is subject to a greater risk of loss as a result of adverse economic, business or other developments affecting a specific sector the Fund has a focused position in, than if its investments were diversified across a greater number of industry sectors. Some sectors possess particular risks that may not affect other sectors. |
| Osterweis Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | There is the risk that you could lose all or a portion of your investment in the Fund. |
| Osterweis Strategic Income Fund | Large Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Company Risk: Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. Also, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion. |
| Osterweis Strategic Income Fund | Small And Medium Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small and Medium Company Risk: Investing in securities of small- and medium-sized companies, even indirectly, may involve greater volatility than investing in larger and more established companies. |
| Osterweis Strategic Income Fund | Economic And Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Economic and Market Risk: Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including: inflation (or expectations for inflation); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied in U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. |
| Osterweis Strategic Income Fund | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: The risk that the Adviser may fail to implement the Fund’s investment strategies and meet its investment objectives. |
| Osterweis Strategic Income Fund | Below Investment Grade Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Below Investment Grade Securities Risk: Investing in fixed income securities that are rated below investment grade involves risks such as increased possibility of default, decreased liquidity of the security and changes in value based on public perception of the issuer. |
| Osterweis Strategic Income Fund | Convertible Security Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Convertible Security Risk: As with a straight debt security, a convertible security tends to increase in market value when interest rates decline and decrease in value when interest rates rise. Like a common stock, the value of a convertible security also tends to increase as the market value of the underlying stock rises, and it tends to decrease as the market value of the underlying stock declines. |
| Osterweis Strategic Income Fund | Currency Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk: Fluctuations in currency exchange rates may adversely affect the value of the Fund’s investments in foreign securities as well as the value of the Fund’s investments in domestic securities whose issuers earn at least a portion of their revenue in foreign currency. |
| Osterweis Strategic Income Fund | Debt Securities Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risks: ◦Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. ◦Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. ◦Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. ◦Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. ◦Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund.
|
| Osterweis Strategic Income Fund | Debt Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. |
| Osterweis Strategic Income Fund | Debt Securities Risk, Defaulted Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. |
| Osterweis Strategic Income Fund | Debt Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. |
| Osterweis Strategic Income Fund | Debt Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. |
| Osterweis Strategic Income Fund | Debt Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund. |
| Osterweis Strategic Income Fund | Foreign Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities: Investing in foreign securities, including depositary receipts, may involve increased risks due to political, social and economic developments abroad, and differences between United States and foreign regulatory practices. Given the global interrelationships of today’s economy, volatility or threats to stability of any significant currency, such as occurred in the recent past with the European Monetary Union, or significant political instability, may affect other markets and affect the risk of an investment in the Fund. |
| Osterweis Strategic Income Fund | Liquidity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk: Securities purchased by the Fund may become illiquid particularly during periods of market turbulence. Illiquid investments may be more difficult to trade and value than liquid ones and, if the Fund is forced to sell these investments promptly to meet redemption requests or for other needs, the Fund may incur a loss. |
| Osterweis Strategic Income Fund | Sector Emphasis Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Emphasis Risk: The Fund, from time to time, may invest 25% or more of its assets in one or more sectors subjecting the Fund to sector emphasis risk. This is the risk that the Fund is subject to a greater risk of loss as a result of adverse economic, business or other developments affecting a specific sector the Fund has a focused position in, than if its investments were diversified across a greater number of industry sectors. Some sectors possess particular risks that may not affect other sectors. |
| Osterweis Strategic Income Fund | U.S. Government And Agency Issuer Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Government and Agency Issuer Risk: Treasury obligations may differ in their interest rates, maturities, times of issuance and other characteristics. Obligations of U.S. Government agencies and authorities are supported by varying degrees of credit but generally are not backed by the full faith and credit of the U.S. Government. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. |
| Osterweis Strategic Income Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | There is the risk that you could lose all or a portion of your investment in the Fund. |
| Osterweis Growth & Income Fund | Equity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Risk: Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value. These fluctuations may cause a security to be worth less than its cost when originally purchased or less than it was worth at an earlier time. |
| Osterweis Growth & Income Fund | Large Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Company Risk: Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. Also, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion. |
| Osterweis Growth & Income Fund | Small And Medium Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small and Medium Company Risk: Investing in securities of small-cap and mid-cap companies, even indirectly, may involve greater volatility than investing in larger and more established companies. |
| Osterweis Growth & Income Fund | Economic And Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Economic and Market Risk: Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including: inflation (or expectations for inflation); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied in U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. |
| Osterweis Growth & Income Fund | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: The risk that the Adviser may fail to implement the Fund’s investment strategies and meet its investment objective. This risk includes the risk that the Adviser’s allocation decisions between equity and fixed income may be incorrect and result in lower performance than if the Fund’s allocation remained static. |
| Osterweis Growth & Income Fund | Below Investment Grade Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Below Investment Grade Securities Risk: Investing in fixed income securities that are rated below investment grade involves risks such as increased possibility of default, decreased liquidity of the security and changes in value based on public perception of the issuer. |
| Osterweis Growth & Income Fund | Convertible Security Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Convertible Security Risk: As with a straight debt security, a convertible security tends to increase in market value when interest rates decline and decrease in value when interest rates rise. Like a common stock, the value of a convertible security also tends to increase as the market value of the underlying stock rises, and it tends to decrease as the market value of the underlying stock declines. |
| Osterweis Growth & Income Fund | Currency Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk: Fluctuations in currency exchange rates may adversely affect the value of the Fund’s investments in foreign securities as well as the value of the Fund’s investments in domestic securities whose issuers earn at least a portion of their revenue in foreign currency. |
| Osterweis Growth & Income Fund | Debt Securities Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risks: ◦Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. ◦Below Investment Grade Securities Risk: Investing in fixed income securities that are rated below investment grade involves risks such as increased possibility of default, decreased liquidity of the security and changes in value based on public perception of the issuer. ◦Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. ◦Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. ◦Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. ◦Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund.
|
| Osterweis Growth & Income Fund | Debt Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer’s financial strength, the market’s perception of an issuer’s creditworthiness, or in a security’s credit rating may affect a security’s value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities. |
| Osterweis Growth & Income Fund | Debt Securities Risk, Defaulted Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (e.g., a security on which a principal or interest payment is not made when due) and obligations of distressed issuers. |
| Osterweis Growth & Income Fund | Debt Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply. |
| Osterweis Growth & Income Fund | Debt Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments. |
| Osterweis Growth & Income Fund | Debt Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security’s maturity. In times of declining interest rates, there is a greater likelihood that the Fund’s higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund. |
| Osterweis Growth & Income Fund | Foreign Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities: Investing in foreign securities, including depositary receipts, may involve increased risks due to political, social and economic developments abroad, and differences between United States and foreign regulatory practices. Given the global interrelationships of today’s economy, volatility or threats to stability of any significant currency, such as occurred in the recent past with the European Monetary Union, or significant political instability, may affect other markets and affect the risk of an investment in the Fund. |
| Osterweis Growth & Income Fund | Emerging Markets Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Risk: Emerging markets may involve greater risk and volatility than more developed markets. Some emerging markets countries may have fixed or managed currencies that are not free-floating against the U.S. dollar. Certain of these currencies have experienced, and may experience in the future, substantial fluctuations or a steady devaluation relative to the U.S. dollar. |
| Osterweis Growth & Income Fund | Liquidity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk: Securities purchased by the Fund may become illiquid particularly during periods of market turbulence. Illiquid investments may be more difficult to trade and value than liquid ones and, if the Fund is forced to sell these investments promptly to meet redemption requests or for other needs, the Fund may incur a loss. |
| Osterweis Growth & Income Fund | Master Limited Partnership Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Master Limited Partnership Risk: Investments held by an MLP may be relatively illiquid, limiting the MLP’s ability to vary its portfolio promptly in response to changes in economic or other conditions. In addition, MLPs may have limited financial resources, their securities may trade infrequently and in limited volume and they may be subject to more abrupt or erratic price movements than securities of larger or more broadly-based companies. The risks of investing in an MLP are generally those inherent in investing in a partnership as opposed to a corporation. For example, state law governing partnerships is often less restrictive than state law governing corporations. Accordingly, there may be fewer protections afforded investors in an MLP than investors in a corporation. Additional risks involved with investing in an MLP are risks associated with the specific industry or industries in which the partnership invests, such as the risks of investing in real estate or oil and gas industries. |
| Osterweis Growth & Income Fund | Sector Emphasis Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Emphasis Risk: The Fund, from time to time, may invest 25% or more of its assets in one or more sectors subjecting the Fund to sector emphasis risk. This is the risk that the Fund is subject to a greater risk of loss as a result of adverse economic, business or other developments affecting a specific sector that the Fund has a focused position in, than if its investments were diversified across a greater number of industry sectors. Some sectors possess particular risks that may not affect other sectors. |
| Osterweis Growth & Income Fund | U.S. Government And Agency Issuer Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Government and Agency Issuer Risk: Treasury obligations may differ in their interest rates, maturities, times of issuance and other characteristics. Obligations of U.S. Government agencies and authorities are supported by varying degrees of credit but generally are not backed by the full faith and credit of the U.S. Government. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. |
| Osterweis Growth & Income Fund | Mortgage-Related And Other Asset-Backed Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mortgage-Related and Other Asset-Backed Securities Risk: The risk that borrowers may default on their mortgage obligations or the guarantees underlying the mortgage-backed securities will default or otherwise fail and that, during periods of falling interest rates, mortgage-backed securities will be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of a mortgage-backed security may extend, which may lock in a below-market interest rate, increase the security’s duration, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, or the underlying assets or collateral may be insufficient if the issuer defaults. The values of certain types of mortgage-backed securities, such as inverse floaters and interest-only and principal-only securities, may be extremely sensitive to changes in interest rates and prepayment rates. |
| Osterweis Growth & Income Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | There is the risk that you could lose all or a portion of your investment in the Fund. |
| Osterweis Opportunity Fund | Equity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Risk: Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value. These fluctuations may cause a security to be worth less than its cost when originally purchased or less than it was worth at an earlier time. |
| Osterweis Opportunity Fund | Small And Medium Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small and Medium Company Risk: Investing in securities of small- and medium-sized companies, even indirectly, may involve greater volatility than investing in larger and more established companies. |
| Osterweis Opportunity Fund | Economic And Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Economic and Market Risk: Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including: inflation (or expectations for inflation); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied in U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. |
| Osterweis Opportunity Fund | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: The risk that the Adviser may fail to implement the Fund’s investment strategies and meet its investment objective. |
| Osterweis Opportunity Fund | Currency Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk: Fluctuations in currency exchange rates may adversely affect the value of the Fund’s investments in foreign securities as well as the value of the Fund’s investments in domestic securities whose issuers earn at least a portion of their revenue in foreign currency. |
| Osterweis Opportunity Fund | Foreign Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities: Investing in foreign securities, including depositary receipts, may involve increased risks due to political, social and economic developments abroad, and differences between United States and foreign regulatory practices. Given the global interrelationships of today’s economy, volatility or threats to stability of any significant currency, such as occurred in the recent past with the European Monetary Union, or significant political instability, may affect other markets and affect the risk of an investment in the Fund. |
| Osterweis Opportunity Fund | Emerging Markets Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Risk: Emerging markets may involve greater risk and volatility than more developed markets. Some emerging markets countries may have fixed or managed currencies that are not free-floating against the U.S. dollar. Certain of these currencies have experienced, and may experience in the future, substantial fluctuations or a steady devaluation relative to the U.S. dollar. |
| Osterweis Opportunity Fund | Liquidity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk: Securities purchased by the Fund may become illiquid particularly during periods of market turbulence. Illiquid investments may be more difficult to trade and value than liquid ones and if the Fund is forced to sell these investments promptly to meet redemption requests or for other needs, the Fund may incur a loss. |
| Osterweis Opportunity Fund | Sector Emphasis Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Emphasis Risk: The Fund, from time to time, may invest 25% or more of its assets in one or more sectors subjecting the Fund to sector emphasis risk. This is the risk that the Fund is subject to a greater risk of loss as a result of adverse economic, business or other developments affecting a specific sector the Fund has a focused position in, than if its investments were diversified across a greater number of industry sectors. Some sectors possess particular risks that may not affect other sectors. –Health Care Sector Risk: The profitability of companies in the health care sector may be affected by extensive, costly and uncertain government regulation, restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), changes in the demand for medical products and services, an increased emphasis on outpatient services, limited product lines, industry innovation and/or consolidation, changes in technologies and other market developments. Many health care companies are heavily dependent on obtaining and defending patents, which may be time consuming and costly. Many health care companies are subject to extensive litigation based on product liability and similar claims. In addition, their products can become obsolete due to industry innovation, changes in technologies or other market developments. |
| Osterweis Opportunity Fund | Sector Emphasis Risk, Health Care Sector Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Health Care Sector Risk: The profitability of companies in the health care sector may be affected by extensive, costly and uncertain government regulation, restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), changes in the demand for medical products and services, an increased emphasis on outpatient services, limited product lines, industry innovation and/or consolidation, changes in technologies and other market developments. Many health care companies are heavily dependent on obtaining and defending patents, which may be time consuming and costly. Many health care companies are subject to extensive litigation based on product liability and similar claims. In addition, their products can become obsolete due to industry innovation, changes in technologies or other market developments. |
| Osterweis Opportunity Fund | Investment Company And Exchange-Traded Fund Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Company and Exchange-Traded Fund Risk: Investing in other investment companies involves the risk that an investment company or other pooled investment vehicle, including any ETFs or money market funds, in which the Fund invests will not achieve its investment objective or execute its investment strategies effectively or that significant purchase or redemption activity by shareholders of such an investment company might negatively affect the value of the investment company’s shares. The Fund must pay its pro rata portion of an investment company’s fees and expenses. |
| Osterweis Opportunity Fund | IPO Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | IPO Risk: The market value of IPO shares will fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk. |
| Osterweis Opportunity Fund | Portfolio Turnover Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Portfolio Turnover Risk: High portfolio turnover may involve correspondingly greater expenses to the Fund, including brokerage commissions or dealer mark-ups and other transaction costs on the sale of securities and reinvestments in other securities, which may result in adverse tax consequences to the Fund’s shareholders. |
| Osterweis Opportunity Fund | Unseasoned Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unseasoned Company Risk: The possibility that the Fund’s investment in relatively new or unseasoned companies that are in their early stages of development may expose the Fund to greater risks than investments in more established companies with more extensive financial histories and greater liquidity. Unseasoned companies generally do not have proven track records and may lack substantial capital reserves. |
| Osterweis Opportunity Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | There is the risk that you could lose all or a portion of your investment in the Fund. |