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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Accounts payable and accrued liabilities22false 5us-gaap_IncreaseDecreaseInIncomeTaxesReceivableus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-96000-96falsefalsefalse2truefalsefalse35570003557falsefalsefalse3truefalsefalse-138000-138falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Income tax receivable23false 5penx_PaymentForRedemptionOfPreferredUnitspenx_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-5311000-5311falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryPayment for redemption of preferred units.No definition available.false2Payment of interest on Series A Preferred Stock, net24false 5us-gaap_IncreaseDecreaseInOtherOperatingCapitalNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-2359000-2359falsefalsefalse2truefalsefalse-2269000-2269falsefalsefalse3truefalsefalse38930003893falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. 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