| Form N-CSR Cover | 6 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Professionally Managed Portfolios |
| Entity Central Index Key | 0000811030 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Sep. 30, 2024 USD ($) $ / shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Professionally Managed Portfolios |
| Entity Central Index Key | 0000811030 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Investor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Osterweis Fund |
| Class Name | Investor Class |
| Trading Symbol | OSTFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Osterweis Fund for the period of April 1, 2024, to September 30, 2024 |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.osterweis.com/regulatory-reports . You can also request this information by contacting us at 1-866-236-0050 . |
| Additional Information Phone Number | 1-866-236-0050 |
| Additional Information Website | https://www.osterweis.com/regulatory-reports |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Annualized costs paid as a percentage of a $10,000 investment Osterweis Fund $49 0.95% |
| Expenses Paid, Amount | $ 49 |
| Expense Ratio, Percent | 0.95% |
| Updated Performance Information Location [Text Block] | Visit https://www.osterweis.com/mutual_funds/performance/monthly for more recent performance information. |
| Net Assets | $ 155,687,356 |
| Holdings Count | $ / shares | 37 |
| Investment Company Portfolio Turnover | 21% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of September 30, 2024) Net Assets $155,687,356 Number of Holdings 37 Portfolio Turnover 21% |
| Holdings [Text Block] | Top Holdings (% of net assets) Microsoft Corp. 6.7% Alphabet, Inc. - Class C 6.5% Amazon.com, Inc. 5.4% Airbus SE 4.0% Visa, Inc. - Class A 3.3% Accenture PLC - Class A 3.2% Becton Dickinson & Co. 3.2% Waste Connections, Inc. 3.1% Adobe, Inc. 3.1% Boston Scientific Corp. 3.0% |
| Updated Prospectus Web Address | https://www.osterweis.com/regulatory-reports. |
| Investor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Osterweis Growth & Income Fund |
| Class Name | Investor Class |
| Trading Symbol | OSTVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Osterweis Growth & Income Fund for the period of April 1, 2024, to September 30, 2024 |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.osterweis.com/ regulatory-reports . You can also request this information by contacting us at 1-866-236-0050 . |
| Additional Information Phone Number | 1-866-236-0050 |
| Additional Information Website | https://www.osterweis.com/regulatory-reports |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Annualized costs paid as a percentage of a $10,000 investment Osterweis Growth & Income Fund $45 0.88% |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.88% |
| Updated Performance Information Location [Text Block] | Visit https://www.osterweis.com/mutual_funds/performance/monthly for more recent performance information. |
| Net Assets | $ 187,592,944 |
| Holdings Count | $ / shares | 158 |
| Investment Company Portfolio Turnover | 22% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of September 30, 2024) Net Assets $187,592,944 Number of Holdings 158 Portfolio Turnover 22% |
| Holdings [Text Block] | Top Holdings (% of net assets) Federated Hermes US Treasury Cash Reserves 7.6% Microsoft Corp. 4.2% Alphabet, Inc. - Class C 3.6% Amazon.com, Inc. 2.7% Airbus SE 2.4% Visa, Inc. - Class A 2.2% EastGroup Properties, Inc. 2.1% Accenture PLC - Class A 2.0% Becton Dickinson & Co. 2.0% The Progressive Corp. 1.9% |
| Updated Prospectus Web Address | https://www.osterweis.com/regulatory-reports. |
| Investor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Osterweis Opportunity Fund |
| Class Name | Investor Class |
| Trading Symbol | OSTGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Osterweis Opportunity Fund (formerly Osterweis Emerging Opportunity Fund) for the period of April 1, 2024, to September 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.osterweis.com/regulatory-reports . You can also request this information by contacting us at 1-866-236-0050 . |
| Additional Information Phone Number | 1-866-236-0050 |
| Additional Information Website | https://www.osterweis.com/regulatory-reports |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Annualized costs paid as a percentage of a $10,000 investment Osterweis Opportunity Fund $58 1.08% |
| Expenses Paid, Amount | $ 58 |
| Expense Ratio, Percent | 1.08% |
| Updated Performance Information Location [Text Block] | Visit https://www.osterweis.com/mutual_funds/performance/monthly for more recent performance information. |
| Net Assets | $ 387,848,141 |
| Holdings Count | $ / shares | 41 |
| Investment Company Portfolio Turnover | 57% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of September 30, 2024) Net Assets $387,848,141 Number of Holdings 41 Portfolio Turnover 57% |
| Holdings [Text Block] | Top Holdings (% of net assets) Federated Hermes US Treasury Cash Reserves 8.0% FirstService Corp. 3.9% Guidewire Software, Inc. 3.8% Skechers USA, Inc. - Class A 3.5% Cavco Industries, Inc. 3.3% Modine Manufacturing Co. 3.2% FTAI Aviation Ltd. 3.1% Generac Holdings, Inc. 3.1% Agilysys, Inc. 3.0% Boot Barn Holdings, Inc. 3.0% |
| Updated Prospectus Web Address | https://www.osterweis.com/regulatory-reports. |
| Investor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Osterweis Strategic Income Fund |
| Class Name | Investor Class |
| Trading Symbol | OSTIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Osterweis Strategic Income Fund for the period of April 1, 2024, to September 30, 2024 |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.osterweis.com/ regulatory-reports . You can also request this information by contacting us at 1-866-236-0050 . |
| Additional Information Phone Number | 1-866-236-0050 |
| Additional Information Website | https://www.osterweis.com/regulatory-reports |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Annualized costs paid as a percentage of a $10,000 investment Osterweis Strategic Income Fund $41 0.81% |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.81% |
| Updated Performance Information Location [Text Block] | Visit https://www.osterweis.com/mutual_funds/performance/monthly for more recent performance information. |
| Net Assets | $ 5,730,393,262 |
| Holdings Count | $ / shares | 180 |
| Investment Company Portfolio Turnover | 23% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of September 30, 2024) Net Assets $5,730,393,262 Number of Holdings 180 Portfolio Turnover 23% |
| Holdings [Text Block] | Top Holdings (% of net assets) MSILF Treasury Securities Portfolio 2.7% Federated Hermes US Treasury Cash Reserves 2.7% United States Treasury Bill 1.7% Delta Air Lines, Inc. 1.3% Pegasystems, Inc. 1.3% Conduent Business Services LLC / Conduent State & Local Solutions, Inc. 1.3% Blackstone Private Credit Fund 1.1% KeHE Distributors LLC / KeHE Finance Corp. / NextWave Distribution, Inc. 1.1% Coeur Mining, Inc. 1.1% Ford Motor Credit Co. LLC 1.1% |
| Updated Prospectus Web Address | https://www.osterweis.com/regulatory-reports. |
| Label | Element | Value |
| Investor Class | Microsoft Corp. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 6.70% |
| Investor Class | Alphabet, Inc. - Class C [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 6.50% |
| Investor Class | Amazon.com, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 5.40% |
| Investor Class | Airbus SE [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 4% |
| Investor Class | Visa, Inc. - Class A [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.30% |
| Investor Class | Accenture PLC - Class A [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.20% |
| Investor Class | Becton Dickinson & Co. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.20% |
| Investor Class | Waste Connections, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| Investor Class | Adobe, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| Investor Class | Boston Scientific Corp. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3% |
| Label | Element | Value |
| Investor Class | Federated Hermes US Treasury Cash Reserves [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 7.60% |
| Investor Class | Microsoft Corp. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 4.20% |
| Investor Class | Alphabet, Inc. - Class C [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.60% |
| Investor Class | Amazon.com, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.70% |
| Investor Class | Airbus SE [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| Investor Class | Visa, Inc. - Class A [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.20% |
| Investor Class | EastGroup Properties, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.10% |
| Investor Class | Accenture PLC - Class A [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2% |
| Investor Class | Becton Dickinson & Co. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2% |
| Investor Class | The Progressive Corp. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.90% |
| Label | Element | Value |
| Investor Class | Federated Hermes US Treasury Cash Reserves [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| Investor Class | FirstService Corp. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.90% |
| Investor Class | Guidewire Software, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.80% |
| Investor Class | Skechers USA, Inc. - Class A [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.50% |
| Investor Class | Cavco Industries, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.30% |
| Investor Class | Modine Manufacturing Co. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.20% |
| Investor Class | FTAI Aviation Ltd. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| Investor Class | Generac Holdings, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| Investor Class | Agilysys, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3% |
| Investor Class | Boot Barn Holdings, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3% |
| Label | Element | Value |
| Investor Class | MSILF Treasury Securities Portfolio [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.70% |
| Investor Class | Federated Hermes US Treasury Cash Reserves [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 2.70% |
| Investor Class | United States Treasury Bill [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.70% |
| Investor Class | Delta Air Lines, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.30% |
| Investor Class | Pegasystems, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.30% |
| Investor Class | Conduent Business Services LLC / Conduent State & Local Solutions, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.30% |
| Investor Class | Blackstone Private Credit Fund [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.10% |
| Investor Class | KeHE Distributors LLC / KeHE Finance Corp. / NextWave Distribution, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.10% |
| Investor Class | Coeur Mining, Inc. [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.10% |
| Investor Class | Ford Motor Credit Co. LLC [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 1.10% |
