| **Consolidated Statements Of Stockholders' Equity (USD $)In Thousands, unless otherwise specified** | Total                                                                                         | Common Stock [Member]                                                                                                                                     | Retained Earnings [Member]                                                                                                                                     | Accumulated Other Comprehensive Income (Loss) [Member]                                                                                                                          |
|-----------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Stockholders' Equity, beginning balance at Oct. 31, 2011                                            | $ 996,923us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest       | $ 446,791us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember | $ 550,584us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember | $ (452)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember |
| **Comprehensive Income:**                                                                           |                                                                                          |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Net income                                                                                          | 119,847us-gaap_NetIncomeLoss                                                                  |                                                                                                                                                      | 119,847us-gaap_NetIncomeLoss/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                            |                                                                                                                                                                            |
| Other comprehensive income                                                                          | 147us-gaap_OtherComprehensiveIncomeLossNetOfTax                                               |                                                                                                                                                      |                                                                                                                                                           | 147us-gaap_OtherComprehensiveIncomeLossNetOfTax/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember                                       |
| Comprehensive Income                                                                                | 119,994us-gaap_ComprehensiveIncomeNetOfTax                                                    |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Common Stock Issued                                                                                 | 22,198us-gaap_StockIssuedDuringPeriodValueNewIssues                                           | 22,198us-gaap_StockIssuedDuringPeriodValueNewIssues/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                                     |                                                                                                                                                           |                                                                                                                                                                            |
| Common Stock Repurchased                                                                            | (26,528)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue                                   | (26,528)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                             |                                                                                                                                                           |                                                                                                                                                                            |
| Tax Benefit from Dividends Paid on ESOP Shares                                                      | 110pny_TaxBenefitFromDividendsPaidOnESOPShares                                                |                                                                                                                                                      | 110pny_TaxBenefitFromDividendsPaidOnESOPShares/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                          |                                                                                                                                                                            |
| Dividends Declared                                                                                  | (85,693)us-gaap_DividendsCommonStockCash                                                      |                                                                                                                                                      | (85,693)us-gaap_DividendsCommonStockCash/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                |                                                                                                                                                                            |
| Stockholders' Equity, ending balance at Oct. 31, 2012                                               | 1,027,004us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest       | 442,461us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember   | 584,848us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember   | (305)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember   |
| **Comprehensive Income:**                                                                           |                                                                                          |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Net income                                                                                          | 134,417us-gaap_NetIncomeLoss                                                                  |                                                                                                                                                      | 134,417us-gaap_NetIncomeLoss/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                            |                                                                                                                                                                            |
| Other comprehensive income                                                                          | 21us-gaap_OtherComprehensiveIncomeLossNetOfTax                                                |                                                                                                                                                      |                                                                                                                                                           | 21us-gaap_OtherComprehensiveIncomeLossNetOfTax/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember                                        |
| Comprehensive Income                                                                                | 134,438us-gaap_ComprehensiveIncomeNetOfTax                                                    |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Common Stock Issued                                                                                 | 119,552us-gaap_StockIssuedDuringPeriodValueNewIssues                                          | 119,552us-gaap_StockIssuedDuringPeriodValueNewIssues/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                                    |                                                                                                                                                           |                                                                                                                                                                            |
| Expenses from Issuance of Common Stock                                                              | (369)pny_CostsOfStockIssuance                                                                 | (369)pny_CostsOfStockIssuance/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                                                           |                                                                                                                                                           |                                                                                                                                                                            |
| Tax Benefit from Dividends Paid on ESOP Shares                                                      | 117pny_TaxBenefitFromDividendsPaidOnESOPShares                                                |                                                                                                                                                      | 117pny_TaxBenefitFromDividendsPaidOnESOPShares/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                          |                                                                                                                                                                            |
| Dividends Declared                                                                                  | (92,146)us-gaap_DividendsCommonStockCash                                                      |                                                                                                                                                      | (92,146)us-gaap_DividendsCommonStockCash/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                |                                                                                                                                                                            |
| **Income Loss Hedging Activities Of Equity Method Investments [Abstract]**                          |                                                                                          |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Hedging activities of equity method investments                                                     | (284)pny_OtherComprehensiveIncomeLossAttributableToHedgingActivitiesOfEquityMethodInvestments |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Stockholders' Equity, ending balance at Oct. 31, 2013                                               | 1,188,596us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest       | 561,644us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember   | 627,236us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember   | (284)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember   |
| **Comprehensive Income:**                                                                           |                                                                                          |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Net income                                                                                          | 143,801us-gaap_NetIncomeLoss                                                                  |                                                                                                                                                      | 143,801us-gaap_NetIncomeLoss/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                            |                                                                                                                                                                            |
| Other comprehensive income                                                                          | 47us-gaap_OtherComprehensiveIncomeLossNetOfTax                                                |                                                                                                                                                      |                                                                                                                                                           | 47us-gaap_OtherComprehensiveIncomeLossNetOfTax/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember                                        |
| Comprehensive Income                                                                                | 143,848us-gaap_ComprehensiveIncomeNetOfTax                                                    |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Common Stock Issued                                                                                 | 75,203us-gaap_StockIssuedDuringPeriodValueNewIssues                                           | 75,203us-gaap_StockIssuedDuringPeriodValueNewIssues/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                                     |                                                                                                                                                           |                                                                                                                                                                            |
| Expenses from Issuance of Common Stock                                                              | (12)pny_CostsOfStockIssuance                                                                  | (12)pny_CostsOfStockIssuance/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember                                                            |                                                                                                                                                           |                                                                                                                                                                            |
| Tax Benefit from Dividends Paid on ESOP Shares                                                      | 118pny_TaxBenefitFromDividendsPaidOnESOPShares                                                |                                                                                                                                                      | 118pny_TaxBenefitFromDividendsPaidOnESOPShares/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                          |                                                                                                                                                                            |
| Dividends Declared                                                                                  | (99,151)us-gaap_DividendsCommonStockCash                                                      |                                                                                                                                                      | (99,151)us-gaap_DividendsCommonStockCash/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember                                                |                                                                                                                                                                            |
| **Income Loss Hedging Activities Of Equity Method Investments [Abstract]**                          |                                                                                          |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Hedging activities of equity method investments                                                     | (213)pny_OtherComprehensiveIncomeLossAttributableToHedgingActivitiesOfEquityMethodInvestments |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Benefit activities of equity method investments                                                     | (24)pny_OtherComprehensiveIncomeLossAttributableToBenefitsOfEquityMethodInvestments           |                                                                                                                                                      |                                                                                                                                                           |                                                                                                                                                                            |
| Stockholders' Equity, ending balance at Oct. 31, 2014                                               | $ 1,308,602us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest     | $ 636,835us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_CommonStockMember | $ 672,004us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_RetainedEarningsMember | $ (237)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest/ us-gaap_StatementEquityComponentsAxis= us-gaap_AccumulatedOtherComprehensiveIncomeMember |

| X                                                                                                                                                                                                                                                                            |
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The cost incurred directly with the issuance of an equity security.
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| - Definition
Amount of stockholder's equity (deficit) relating to benefit activities of equity method investments.
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Amount of stockholders' equity (deficit) relating to hedging activities of equity method investments.
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| X                                                                                                                                                                                                                                                                                                                             |
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| - Definition
The tax benefit resulting from dividends paid on stock held by an employee stock ownership plan.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).
+ References
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