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Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] ck0000811030_SupplementTextBlock
Muzinich Credit Opportunities Fund

(Class A, Institutional and Supra Institutional shares)

Supplement dated October 14, 2014 to the

Summary Prospectus and Prospectus dated April 30, 2014, as supplemented

Effective immediately, the following replaces the table on page 1 of the Summary Prospectus and page 1 of the statutory prospectus:
Risk/Return [Heading] rr_RiskReturnHeading Muzinich Credit Opportunities Fund
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2015-04-30
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not correlate to the Ratio of Expenses to Average Net Assets after Fees waived provided in the Financial Highlights section of the Fund's audited financial statements for the period ended December 31, 2013, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
The Example below is intended to help you compare the cost of investing in the Credit Opportunities Fund with the cost of investing in other mutual funds. This Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of each period. The Example also assumes that your investment has a 5% annual return each year and that the Fund’s operating expenses remain the same (taking into account the Expense Caps in the first year only).
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example Closing [Text Block] rr_ExpenseExampleClosingTextBlock
Please retain this Supplement with the Summary Prospectus and Prospectus.
Class A Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_Component1OtherExpensesOverAssets 1.86%
Shareholder Servicing Fees rr_Component2OtherExpensesOverAssets 0.10%
Total Other Expenses rr_OtherExpensesOverAssets 1.96% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.81%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.86%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.95% [2],[3]
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses and acquired fund fees and expenses for Class A and Institutional Class are based on estimated amounts for the current fiscal year.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates Other expenses and acquired fund fees and expenses for Class A and Institutional Class are based on estimated amounts for the current fiscal year.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 518
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,090
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,688
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,300
Institutional Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_Component1OtherExpensesOverAssets 1.86%
Shareholder Servicing Fees rr_Component2OtherExpensesOverAssets 0.10%
Total Other Expenses rr_OtherExpensesOverAssets 1.96% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.56%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.86%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.70% [2],[3]
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses and acquired fund fees and expenses for Class A and Institutional Class are based on estimated amounts for the current fiscal year.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates Other expenses and acquired fund fees and expenses for Class A and Institutional Class are based on estimated amounts for the current fiscal year.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 619
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,193
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,755
Supra Institutional Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_Component1OtherExpensesOverAssets 1.86%
Total Other Expenses rr_OtherExpensesOverAssets 1.86% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.46%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.86%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.60% [2],[3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 61
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 588
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,142
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,655
[1] Other expenses and acquired fund fees and expenses for Class A and Institutional Class are based on estimated amounts for the current fiscal year.
[2] Muzinich & Co., Inc. (the "Advisor") has contractually agreed to waive its fees and reimburse certain expenses (excluding taxes, leverage interest, portfolio transaction expenses, acquired fund fees and expenses and extraordinary expenses) to limit Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for Class A Shares, Institutional Shares and Supra Institutional Shares to 0.95%, 0.70% and 0.60%, respectively, of the Credit Opportunities Fund's average daily net assets through April 30, 2015 (the "Expense Caps"). The Expense Caps may be changed or eliminated at any time after April 30, 2015, by the Board of Trustees upon 60 days' written notice to the Advisor, or by the Advisor with the consent of the Board of Trustees. The Advisor may request recoupment of previously waived fees and paid expenses from the Fund for three years from the date they were waived or paid, subject to the Expense Caps.
[3] The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement do not correlate to the Ratio of Expenses to Average Net Assets after Fees waived provided in the Financial Highlights section of the Fund's audited financial statements for the period ended December 31, 2013, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.