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Stockholders' Equity (Details) (USD $)
 0 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Dec. 16, 2013
Feb. 04, 2013
Jan. 29, 2013
Feb. 28, 2012
Jan. 05, 2012
Oct. 31, 2014
Jul. 31, 2014
Apr. 30, 2014
Jan. 31, 2014
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Feb. 19, 2013
Dec. 16, 2005
Sep. 30, 2004
Mar. 06, 2009
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                        
Common Stock, Shares, Outstanding, Beginning Balance                 76,099,000us-gaap_CommonStockSharesOutstanding       72,250,000us-gaap_CommonStockSharesOutstanding 76,099,000us-gaap_CommonStockSharesOutstanding 72,250,000us-gaap_CommonStockSharesOutstanding 72,318,000us-gaap_CommonStockSharesOutstanding        
Common Stock, Value, Issued, Beginning Balance                 $ 561,644,000us-gaap_CommonStockValue       $ 442,461,000us-gaap_CommonStockValue $ 561,644,000us-gaap_CommonStockValue $ 442,461,000us-gaap_CommonStockValue $ 446,791,000us-gaap_CommonStockValue        
Stock Issued During Period, Shares, Employee Stock Purchase Plans                           34,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans 33,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans 30,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans        
Stock Issued During Period, Value, Employee Stock Purchase Plan                           1,143,000us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan 1,056,000us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan 894,000us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan        
Stock Issued During Period, Shares, Dividend Reinvestment Plan                           698,000us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan 720,000us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan 677,000us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan        
Stock Issued During Period, Value, Dividend Reinvestment Plan                           23,443,000us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan 22,791,000us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan 20,508,000us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan        
Shares Issued During Period Shares Incentive Compensation Plan (ICP)                           100,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross 96,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross 25,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross        
Shares Issued During Period Value Incentive Compensation Plan (ICP)                           3,315,000us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross 3,065,000us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross 796,000us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross        
Shares Repurchased During Period Shares Accelerated Share Repurchase (ASR) Plan         (800,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares                     (800,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares        
Shares repurchased under Accelerated Share Repurchase (ASR) agreement                               (26,528,000)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue        
Issuance of commons stock shares through public share offering, net of underwriting fees 1,600,000.0us-gaap_StockIssuedDuringPeriodSharesNewIssues 3,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues                       1,600,000us-gaap_StockIssuedDuringPeriodSharesNewIssues 3,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues          
Issuance of common stock through public share offering, net of underwriting fees                           47,290,000pny_CommonStockIssuedPublicOffering 92,640,000pny_CommonStockIssuedPublicOffering          
Expenses from Issuance of Common Stock                           (12,000)pny_CostsOfStockIssuance (369,000)pny_CostsOfStockIssuance          
Common Stock, Shares, Outstanding, Ending Balance           78,531,000us-gaap_CommonStockSharesOutstanding       76,099,000us-gaap_CommonStockSharesOutstanding       78,531,000us-gaap_CommonStockSharesOutstanding 76,099,000us-gaap_CommonStockSharesOutstanding 72,250,000us-gaap_CommonStockSharesOutstanding        
Common Stock, Value, Issued, Ending Balance           636,835,000us-gaap_CommonStockValue       561,644,000us-gaap_CommonStockValue       636,835,000us-gaap_CommonStockValue 561,644,000us-gaap_CommonStockValue 442,461,000us-gaap_CommonStockValue        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]                                        
Accumulated OCIL beginning balance, net of tax                 (284,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax       (305,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (284,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (305,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax          
Total other comprehensive income                           47,000us-gaap_OtherComprehensiveIncomeLossNetOfTax 21,000us-gaap_OtherComprehensiveIncomeLossNetOfTax 147,000us-gaap_OtherComprehensiveIncomeLossNetOfTax        
Accumulated OCIL ending balance, net of tax           (237,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax       (284,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax       (237,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (284,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (305,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax        
Accelerated Share Repurchases, Initial Price Paid Per Share         $ 33.77us-gaap_AcceleratedShareRepurchasesInitialPricePaidPerShare                              
Stock Repurchased During Period Value At Initial Price ASR Plan         (27,000,000)pny_StockRepurchasedDuringPeriodValueAtInitialPriceAcceleratedShareRepurchasePlan                              
Accelerated Share Repurchases, Settlement (Payment) or Receipt       500,000us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt                                
Accelerated Share Repurchases Weighted Average Purchase Price Per Share       $ 33.25pny_AcceleratedShareRepurchasesWeightedAveragePurchasePricePerShare                                
Accelerated Share Repurchases Discount On Weighted Average Purchase Price Per Share       $ 0.09pny_AcceleratedShareRepurchasesDiscountOnWeightedAveragePurchasePricePerShare                                
Accelerated Share Repurchases, Final Price Paid Per Share       $ 33.16us-gaap_AcceleratedShareRepurchasesFinalPricePaidPerShare                                
Class of Stock [Line Items]                                        
Common Stock, Capital Shares Reserved for Future Issuance           1,966,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance               1,966,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                                        
Income (Loss) from Equity Method Investments                           32,753,000us-gaap_IncomeLossFromEquityMethodInvestments 26,056,000us-gaap_IncomeLossFromEquityMethodInvestments 23,904,000us-gaap_IncomeLossFromEquityMethodInvestments        
Income taxes                           (11,642,000)pny_NonOperatingIncomeTaxExpenseBenefit (8,612,000)pny_NonOperatingIncomeTaxExpenseBenefit (9,116,000)pny_NonOperatingIncomeTaxExpenseBenefit        
Net Income           (8,967,000)us-gaap_NetIncomeLoss (7,344,000)us-gaap_NetIncomeLoss 62,540,000us-gaap_NetIncomeLoss 97,572,000us-gaap_NetIncomeLoss (5,003,000)us-gaap_NetIncomeLoss (2,293,000)us-gaap_NetIncomeLoss 55,790,000us-gaap_NetIncomeLoss 85,923,000us-gaap_NetIncomeLoss 143,801,000us-gaap_NetIncomeLoss 134,417,000us-gaap_NetIncomeLoss 119,847,000us-gaap_NetIncomeLoss        
Forward Contract Indexed to Issuer's Equity [Line Items]                                        
Maximum Number Of Shares To Be Purchased     4,600,000pny_MaximumNumberOfSharesToBePurchased                                  
Common Stock Issued, Value 47,300,000us-gaap_StockIssuedDuringPeriodValueNewIssues 92,600,000us-gaap_StockIssuedDuringPeriodValueNewIssues                       75,203,000us-gaap_StockIssuedDuringPeriodValueNewIssues 119,552,000us-gaap_StockIssuedDuringPeriodValueNewIssues 22,198,000us-gaap_StockIssuedDuringPeriodValueNewIssues        
Common Stock Issued, Shares 1,600,000.0us-gaap_StockIssuedDuringPeriodSharesNewIssues 3,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues                       1,600,000us-gaap_StockIssuedDuringPeriodSharesNewIssues 3,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues          
Shares Issued, Price Per Share   $ 32us-gaap_SharesIssuedPricePerShare                                    
Underwriter Discount   $ 1.12pny_UnderwriterDiscount                                    
Net Settlement Price Per Share $ 30.88pny_NetSettlementPricePerShare $ 30.88pny_NetSettlementPricePerShare                                    
Forward Contract Indexed to Issuer's Equity, Settlement Date                           Dec. 16, 2013            
Combined Forward Sale Agreements [Member]                                        
Forward Contract Indexed to Issuer's Equity [Line Items]                                        
Forward Contract Indexed to Issuer's Equity, Shares   1,600,000.0us-gaap_ForwardContractIndexedToIssuersEquityShares
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= pny_CombinedForwardSaleAgreementsMember		                                    
Forward Sale Agreement [Member]                                        
Forward Contract Indexed to Issuer's Equity [Line Items]                                        
Forward Contract Indexed to Issuer's Equity, Shares   1,000,000us-gaap_ForwardContractIndexedToIssuersEquityShares
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= pny_ForwardSaleAgreementMember		                                    
Additional Forward Sale Agreement [Member]                                        
Forward Contract Indexed to Issuer's Equity [Line Items]                                        
Shares Option To Purchase Exercised By Underwriters                                 600,000pny_SharesOptionToPurchaseExercisedByUnderwriters
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= pny_AdditionalForwardSaleAgreementMember		      
Additional Forward Sale Agreement [Member] | Maximum [Member]                                        
Forward Contract Indexed to Issuer's Equity [Line Items]                                        
Forward Contract Indexed to Issuer's Equity, Indexed Shares   600,000.0us-gaap_ForwardContractIndexedToIssuersEquityIndexedShares
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= pny_AdditionalForwardSaleAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                                    
Reclassification out of Accumulated Other Comprehensive Income [Member]                                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                                        
Net Income                           (308,000)us-gaap_NetIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember		 130,000us-gaap_NetIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember		          
Common Stock Open Market Purchase Program [Member]                                        
Class of Stock [Line Items]                                        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased                                   6,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= pny_CommonStockOpenMarketPurchaseProgramMember		 3,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= pny_CommonStockOpenMarketPurchaseProgramMember		  
ASR Program [Member]                                        
Class of Stock [Line Items]                                        
Additional Authorized Common Stock Repurchases Shares                                   4,000,000pny_AdditionalAuthorizedCommonStockRepurchasesShares
/ us-gaap_ShareRepurchaseProgramAxis
= pny_AsrProgramMember		    
Common Stock Open Market Purchase Program and ASR Program [Member]                                        
Class of Stock [Line Items]                                        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased                                   10,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= pny_CommonStockOpenMarketPurchaseProgramAndAsrProgramMember		    
Additional Authorized Common Stock Repurchases Shares                                       4,000,000pny_AdditionalAuthorizedCommonStockRepurchasesShares
/ us-gaap_ShareRepurchaseProgramAxis
= pny_CommonStockOpenMarketPurchaseProgramAndAsrProgramMember
Employee Stock Purchase Plan [Member]                                        
Class of Stock [Line Items]                                        
Common Stock, Capital Shares Reserved for Future Issuance           176,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= pny_EmployeeStockPurchasePlanMember		               176,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= pny_EmployeeStockPurchasePlanMember		            
Dividend Reinvestment Plan [Member]                                        
Class of Stock [Line Items]                                        
Common Stock, Capital Shares Reserved for Future Issuance           840,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= pny_DividendReinvestmentPlanMember		               840,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= pny_DividendReinvestmentPlanMember		            
Stock Compensation Plan [Member]                                        
Class of Stock [Line Items]                                        
Common Stock, Capital Shares Reserved for Future Issuance           950,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= us-gaap_StockCompensationPlanMember		               950,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ pny_StatementOfSharesReservedForFutureIssuanceAxis
= us-gaap_StockCompensationPlanMember		            
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]                                        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]                                        
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax                           355,000us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 (109,000)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Amounts reclassified, net of tax                           (284,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 130,000us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Total other comprehensive income                           71,000us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 21,000us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]                                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                                        
Income (Loss) from Equity Method Investments                           (461,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 215,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Income taxes                           177,000pny_NonOperatingIncomeTaxExpenseBenefit
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 (85,000)pny_NonOperatingIncomeTaxExpenseBenefit
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Net Income                           (284,000)us-gaap_NetIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		 130,000us-gaap_NetIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember		          
Accumulated Defined Benefit Plans Adjustment [Member]                                        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]                                        
Total other comprehensive income                           (24,000)us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		            
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]                                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                                        
Income (Loss) from Equity Method Investments                           (40,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		            
Income taxes                           16,000pny_NonOperatingIncomeTaxExpenseBenefit
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		            
Net Income                           $ (24,000)us-gaap_NetIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember