Operating Expenses: Operating Expenses Column [Text] Management Fees (as a percentage of Assets) Distribution and Service (12b-1) Fees Distribution or Similar (Non 12b-1) Fees Component1 Other Expenses Component2 Other Expenses Component3 Other Expenses Other Expenses (as a percentage of Assets): Acquired Fund Fees and Expenses Expenses (as a percentage of Assets) Fee Waiver or Reimbursement Fee Waiver or Reimbursement Net Expenses (as a percentage of Assets) Prospectus: Prospectus: Document [Axis] Document [Axis] Prospectus Prospectus PFI Prospectus - Class A, C, P PFI Prospectus - Class A, C, P PFI Prospectus - Class A, C, P Risk/Return: Risk/Return [Heading] Objective [Heading] Objective, Primary [Text Block] Objective, Secondary [Text Block] Expense [Heading] Expense Narrative [Text Block] Shareholder Fees Caption [Text] Shareholder Fees [Table] Operating Expenses Caption [Text] Annual Fund Operating Expenses [Table] Expense Footnotes [Text Block] Expenses Deferred Charges [Text Block] Expenses Range of Exchange Fees [Text Block] Expense Example [Heading] Expense Example by Year [Heading] Expense Example Narrative [Text Block] Expense Example by, Year, Caption [Text] Expense Example, With Redemption [Table] Expense Example, No Redemption Narrative [Text Block] Expense Example, No Redemption, By Year, Caption [Text] Expense Example, No Redemption [Table] Expense Example Footnotes [Text Block] Expense Example Closing [Text Block] Portfolio Turnover [Heading] Portfolio Turnover [Text Block] Strategy [Heading] Strategy Narrative [Text Block] Risk [Heading] Risk Narrative [Text Block] Risk Footnotes [Text Block] Risk Closing [Text Block] Bar Chart and Performance Table [Heading] Performance Narrative [Text Block] Bar Chart Narrative [Text Block] Bar Chart [Heading] Bar Chart [Table] Bar Chart Footnotes [Text Block] Bar Chart Closing [Text Block] Performance Table Heading Performance Table Narrative Performance [Table] Market Index Performance [Table] Performance Table Footnotes Performance Table Closing [Text Block] Expense Example: Expense Example, By Year, Column [Text] Expense Example, with Redemption, 1 Year Expense Example, with Redemption, 3 Years Expense Example, with Redemption, 5 Years Expense Example, with Redemption, 10 Years Bar Chart Table: Annual Return Caption [Text] Annual Return, Column [Text] Annual Return, Inception Date Annual Return 1990 Annual Return 1991 Annual Return 1992 Annual Return 1993 Annual Return 1994 Annual Return 1995 Annual Return 1996 Annual Return 1997 Annual Return 1998 Annual Return 1999 Annual Return 2000 Annual Return 2001 Annual Return 2002 Annual Return 2003 Annual Return 2004 Annual Return 2005 Annual Return 2006 Annual Return 2007 Annual Return 2008 Annual Return 2009 Annual Return 2010 Annual Return 2011 Annual Return 2012 Annual Return 2013 Annual Return 2014 Expense Example, No Redemption: Expense Example, No Redemption, By Year, Column [Text] Expense Example, No Redemption, 1 Year Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 5 Years Expense Example, No Redemption, 10 Years Risk/Return Detail [Table] Average Annual Return: Label 1 Year 5 Years 10 Years Since Inception Inception Date Share Class [Axis] Share Class [Axis] Diversified Real Asset Fund, Class A Diversified Real Asset Fund, Class A Diversified Real Asset Fund, Class A, C000085834, PRDAX Diversified Real Asset Fund, Class C Diversified Real Asset Fund, Class C Diversified Real Asset Fund, Class C, C000085835, PRDCX Diversified Real Asset Fund, Class P Diversified Real Asset Fund, Class P, C000092708, PRDPX Global Multi-Strategy Fund, Class A Global Multi-Strategy Fund, Class A, C000104712, PMSAX Global Multi-Strategy Fund, Class C Global Multi-Strategy Fund, Class C, C000115417, PMSCX Global Multi-Strategy Fund, Class P Global Multi-Strategy Fund, Class P, C000104713, PMSPX Opportunistic Municipal Fund, Class A Opportunistic Municipal Fund, Class A, C000115414, PMOAX Opportunistic Municipal Fund, Class C Opportunistic Municipal Fund, Class C, C000115415, PMODX Preferred Securities Fund, Class A Preferred Securities Fund, Class A, C000019597, PPSAX Preferred Securities Fund, Class C Preferred Securities Fund, Class C, C000038790, PRFCX Preferred Securities Fund, Class P Preferred Securities Fund, Class P, C000092699, PPSPX Small-MidCap Dividend Income Fund, Class A Small-MidCap Dividend Income Fund, Class A, C000101659, PMDAX Small-MidCap Dividend Income Fund, Class C Small-MidCap Dividend Income Fund, Class C, C000115416, PMDDX Small-MidCap Dividend Income Fund, Class P Small-MidCap Dividend Income Fund, Class P, C000101660, PMDPX Share Classes Share Classes Document Type Document Period End Date Registrant Name Central Index Key Amendment Flag Amendment Description Trading Symbol Document Creation Date Document Effective Date Prospectus Date Shareholder Fees Column [Text] Maximum Cumulative Sales Charge (as a percentage of Offering Price) Maximum Cumulative Sales Charge (as a percentage) Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee Exchange Fee (as a percentage of Amount Redeemed) Exchange Fee Maximum Account Fee (as a percentage of Assets) Maximum Account Fee Shareholder Fee, Other Fee Waiver or Reimbursement over Assets, Date of Termination Portfolio Turnover, Rate Expense Breakpoint Discounts [Text] Expense Breakpoint, Minimum Investment Required [Amount] Expense Exchange Traded Fund Commissions [Text] Expenses Represent Both Master and Feeder [Text] Expenses Explanation of Nonrecurring Account Fee [Text] Other Expenses, New Fund, Based on Estimates [Text] Acquired Fund Fees and Expenses, Based on Estimates [Text] Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Expenses Restated to Reflect Current [Text] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Strategy Portfolio Concentration [Text] Risk Lose Money [Text] Risk Nondiversified Status [Text] Risk Money Market Fund [Text] Risk Not Insured Depository Institution [Text] Risk Caption Risk Column [Text] Risk [Text] Performance Information Illustrates Variability of Returns [Text] Performance One Year or Less [Text] Performance Additional Market Index [Text] Performance Availability Phone [Text] Performance Availability Website Address [Text] Performance Past Does Not Indicate Future [Text] Bar Chart Does Not Reflect Sales Loads [Text] Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Bar Chart, Returns for Class Not Offered in Prospectus [Text] Year to Date Return, Label Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return Highest Quarterly Return, Label Highest Quarterly Return, Date Highest Quarterly Return Lowest Quarterly Return, Label Lowest Quarterly Return, Date Lowest Quarterly Return Performance Table Does Reflect Sales Loads Performance Table Market Index Changed Index No Deduction for Fees, Expenses, Taxes [Text] Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table One Class of after Tax Shown [Text] Performance Table Explanation after Tax Higher Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Caption Column Money Market Seven Day Yield, Caption [Text] Money Market Seven Day Yield Column [Text] Money Market Seven Day Yield Phone Money Market Seven Day Yield Money Market Seven Day Tax Equivalent Yield Thirty Day Yield Caption Thirty Day Yield Column [Text] Thirty Day Yield Phone Thirty Day Yield Thirty Day Tax Equivalent Yield Shareholder Fees: PFI Prospectus - Class J PFI Prospectus - Class J PFI Prospectus - Class J Bond Market Index Fund, Class J Bond Market Index Fund, Class J, C000085837, PBIJX Preferred Securities Fund, Class J Preferred Securities Fund, Class J, C000019596, PPSJX PFI Prospectus - Institutional Class Shares PFI Prospectus - Institutional Class Shares PFI Prospectus - Institutional Class Shares Blue Chip Fund, Institutional Class Blue Chip Fund, Institutional Class, C000115413, PBCKX Bond Market Index Fund, Institutional Class Bond Market Index Fund, Institutional Class, C000082026, PNIIX Bond Market Index Fund, Class R-1 Bond Market Index Fund, Class R-1, C000082027, PBIMX Bond Market Index Fund, Class R-2 Bond Market Index Fund, Class R-2, C000082028, PBINX Bond Market Index Fund, Class R-3 Bond Market Index Fund, Class R-3, C000082029, PBOIX Bond Market Index Fund, Class R-4 Bond Market Index Fund, Class R-4, C000082030, PBIPX Bond Market Index Fund, Class R-5 Bond Market Index Fund, Class R-5, C000082031, PBIQX Diversified Real Asset Fund, Institutional Class Diversified Real Asset Fund, Institutional Class, C000085836, PDRDX Global Multi-Strategy Fund, Institutional Class Global Multi-Strategy Fund, Institutional Class, C000104714, PSMIX Global Opportunities Fund, Institutional Class Global Opportunities Fund, Institutional Class, C000121678, PGOIX International Equity Index Fund, Institutional Class International Equity Index Fund, Institutional Class, C000082035, PIDIX International Equity Index Fund, Class R-1 International Equity Index Fund, Class R-1, C000082036, PILIX International Equity Index Fund, Class R-2 International Equity Index Fund, Class R-2, C000082037, PINEX International Equity Index Fund, Class R-3 International Equity Index Fund, Class R-3, C000082032, PIIOX International Equity Index Fund, Class R-4 International Equity Index Fund, Class R-4, C000082033, PIIPX International Equity Index Fund, Class R-5 International Equity Index Fund, Class R-5, C000082034, PIIQX Preferred Securities Fund, Institutional Class Preferred Securities Fund, Institutional Class, C000019595, PPSIX Preferred Securities Fund, Class R-1 Preferred Securities Fund, Class R-1, C000019594, PUSAX Preferred Securities Fund, Class R-2 Preferred Securities Fund, Class R-2, C000019590, PPRSX Preferred Securities Fund, Class R-3 Preferred Securities Fund, Class R-3, C000019591, PNARX Preferred Securities Fund, Class R-4 Preferred Securities Fund, Class R-4, C000019593, PQARX Preferred Securities Fund, Class R-5 Preferred Securities Fund, Class R-5, C000019592, PPARX Small-MidCap Dividend Income Fund, Institutional Class Small-MidCap Dividend Income Fund, Institutional Class, C000101661, PMDIX Performance Measure [Axis] Before Taxes Barclays Aggregate Bond Index Barclays Aggregate Bond Index Barclays US Treasury TIPS Index Barclays US Treasury TIPS Index MSCI US REIT Index MSCI US REIT Index Dow Jones UBS Commodity Index Dow Jones UBS Commodity Index S&P North American Natural Resources Index S&P North American Natural Resources Index Tortoise MLP Index Tortoise MLP Index Dow Jones Brookfield Global Infrastructure Index Dow Jones Brookfield Global Infrastructure Index Credit Suisse Leveraged Loan Index Credit Suisse Leveraged Loan Index FTSE EPRA/NAREIT Developed Index FTSE EPRA/NAREIT Developed Index Diversified Real Asset Custom Index Diversified Real Asset Custom Index MSCI - EAFE NDTR D Index MSCI - EAFE NDTR D Index BofA Merrill Lynch Fixed Rate Preferred Securities Index BofA Merrill Lynch Fixed Rate Preferred Securities Index Barclays U.S. Tier I Capital Securities Index Barclays U.S. Tier I Capital Securities Index Preferreds Blended Index Preferreds Blended Index After Taxes on Distributions After Taxes on Distributions and Sales Series [Axis] Series Blue Chip Fund Blue Chip Fund, S000037378 Bond Market Index Fund Bond Market Index Fund, S000027178 Diversified Real Asset Fund Diversified Real Asset Fund, S000028139 Global Multi-Strategy Fund Global Multi-Strategy Fund, S000033960 Global Opportunities Fund Global Opportunities Fund, S000039504 International Equity Index Fund International Equity Index Fund, S000027179 Opportunistic Municipal Fund Opportunistic Municipal Fund, S000037379 Preferred Securities Fund Preferred Securities Fund, S000007170 Small-MidCap Dividend Income Fund Small-MidCap Dividend Income Fund, S000032942