3.3.0.814 html 71 185 1 false 32 0 false 9 false false R1.htm 00090 - Document - Document And Entity Information Sheet http://eplweb.com/role/DocumentDocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 00100 - Statement - Consolidated Balance Sheets Sheet http://eplweb.com/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 00105 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://eplweb.com/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - Consolidated Statements of Operations Sheet http://eplweb.com/role/StatementConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 00500 - Statement - Consolidated Statements of Cash Flows Sheet http://eplweb.com/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 5 false false R6.htm 10101 - Disclosure - Organization and Summary of Significant Accounting Policies Sheet http://eplweb.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies Organization and Summary of Significant Accounting Policies Notes 6 false false R7.htm 10201 - Disclosure - Pushdown Accounting and Goodwill Sheet http://eplweb.com/role/DisclosurePushdownAccountingAndGoodwill Pushdown Accounting and Goodwill Notes 7 false false R8.htm 10301 - Disclosure - Property and Equipment Sheet http://eplweb.com/role/DisclosurePropertyAndEquipment Property and Equipment Notes 8 false false R9.htm 10401 - Disclosure - Asset Retirement Obligations Sheet http://eplweb.com/role/DisclosureAssetRetirementObligations Asset Retirement Obligations Notes 9 false false R10.htm 10501 - Disclosure - Indebtedness Sheet http://eplweb.com/role/DisclosureIndebtedness Indebtedness Notes 10 false false R11.htm 10601 - Disclosure - Derivative Financial Instruments Sheet http://eplweb.com/role/DisclosureDerivativeFinancialInstruments Derivative Financial Instruments Notes 11 false false R12.htm 10701 - Disclosure - Fair Value Measurements Sheet http://eplweb.com/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 12 false false R13.htm 10801 - Disclosure - Income Taxes Sheet http://eplweb.com/role/DisclosureIncomeTaxes Income Taxes Notes 13 false false R14.htm 10901 - Disclosure - Related Party Transactions Sheet http://eplweb.com/role/DisclosureRelatedPartyTransactions Related Party Transactions Notes 14 false false R15.htm 11001 - Disclosure - Commitments and Contingencies Sheet http://eplweb.com/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 15 false false R16.htm 11101 - Disclosure - Supplemental Condensed Consolidating Financial Information Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformation Supplemental Condensed Consolidating Financial Information Notes 16 false false R17.htm 20101 - Disclosure - Organization and Summary of Significant Accounting Policies (Policy) Sheet http://eplweb.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesPolicy Organization and Summary of Significant Accounting Policies (Policy) Policies http://eplweb.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies 17 false false R18.htm 30303 - Disclosure - Property and Equipment (Tables) Sheet http://eplweb.com/role/DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) Tables http://eplweb.com/role/DisclosurePropertyAndEquipment 18 false false R19.htm 30403 - Disclosure - Asset Retirement Obligations (Tables) Sheet http://eplweb.com/role/DisclosureAssetRetirementObligationsTables Asset Retirement Obligations (Tables) Tables http://eplweb.com/role/DisclosureAssetRetirementObligations 19 false false R20.htm 30503 - Disclosure - Indebtedness (Tables) Sheet http://eplweb.com/role/DisclosureIndebtednessTables Indebtedness (Tables) Tables http://eplweb.com/role/DisclosureIndebtedness 20 false false R21.htm 30603 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) Tables http://eplweb.com/role/DisclosureDerivativeFinancialInstruments 21 false false R22.htm 30703 - Disclosure - Fair Value Measurements (Tables) Sheet http://eplweb.com/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://eplweb.com/role/DisclosureFairValueMeasurements 22 false false R23.htm 31103 - Disclosure - Supplemental Condensed Consolidating Financial Information (Tables) Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationTables Supplemental Condensed Consolidating Financial Information (Tables) Tables http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformation 23 false false R24.htm 40201 - Disclosure - Pushdown Accounting and Goodwill (Narrative) (Details) Sheet http://eplweb.com/role/DisclosurePushdownAccountingAndGoodwillNarrativeDetails Pushdown Accounting and Goodwill (Narrative) (Details) Details http://eplweb.com/role/DisclosurePushdownAccountingAndGoodwill 24 false false R25.htm 40301 - Disclosure - Property and Equipment (Narrative) (Details) Sheet http://eplweb.com/role/DisclosurePropertyAndEquipmentNarrativeDetails Property and Equipment (Narrative) (Details) Details http://eplweb.com/role/DisclosurePropertyAndEquipmentTables 25 false false R26.htm 40302 - Disclosure - Property and Equipment (Schedule of Property and Equipment) (Details) Sheet http://eplweb.com/role/DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetails Property and Equipment (Schedule of Property and Equipment) (Details) Details http://eplweb.com/role/DisclosurePropertyAndEquipmentTables 26 false false R27.htm 40402 - Disclosure - Asset Retirement Obligations (Schedule of Changes in Asset Retirement Obligations) (Details) Sheet http://eplweb.com/role/DisclosureAssetRetirementObligationsScheduleOfChangesInAssetRetirementObligationsDetails Asset Retirement Obligations (Schedule of Changes in Asset Retirement Obligations) (Details) Details http://eplweb.com/role/DisclosureAssetRetirementObligationsTables 27 false false R28.htm 40501 - Disclosure - Indebtedness (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureIndebtednessNarrativeDetails Indebtedness (Narrative) (Details) Details http://eplweb.com/role/DisclosureIndebtednessTables 28 false false R29.htm 40503 - Disclosure - Indebtedness (Schedule of Indebtedness) (Details) Sheet http://eplweb.com/role/DisclosureIndebtednessScheduleOfIndebtednessDetails Indebtedness (Schedule of Indebtedness) (Details) Details http://eplweb.com/role/DisclosureIndebtednessTables 29 false false R30.htm 40504 - Disclosure - Indebtedness (Interest Expense) (Details) Sheet http://eplweb.com/role/DisclosureIndebtednessInterestExpenseDetails Indebtedness (Interest Expense) (Details) Details http://eplweb.com/role/DisclosureIndebtednessTables 30 false false R31.htm 40601 - Disclosure - Derivative Financial Instruments (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsNarrativeDetails Derivative Financial Instruments (Narrative) (Details) Details http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsTables 31 false false R32.htm 40602 - Disclosure - Derivative Financial Instruments (Schedule of Derivative Instruments Outstanding) (Details) Sheet http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsScheduleOfDerivativeInstrumentsOutstandingDetails Derivative Financial Instruments (Schedule of Derivative Instruments Outstanding) (Details) Details http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsTables 32 false false R33.htm 40603 - Disclosure - Derivative Financial Instruments (Components of Gain (Loss) on Derivative Instruments) (Details) Sheet http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsComponentsOfGainLossOnDerivativeInstrumentsDetails Derivative Financial Instruments (Components of Gain (Loss) on Derivative Instruments) (Details) Details http://eplweb.com/role/DisclosureDerivativeFinancialInstrumentsTables 33 false false R34.htm 40701 - Disclosure - Fair Value Measurements (Schedule of Fair Value Measurements of Assets and Liabilities) (Details) Sheet http://eplweb.com/role/DisclosureFairValueMeasurementsScheduleOfFairValueMeasurementsOfAssetsAndLiabilitiesDetails Fair Value Measurements (Schedule of Fair Value Measurements of Assets and Liabilities) (Details) Details http://eplweb.com/role/DisclosureFairValueMeasurementsTables 34 false false R35.htm 40702 - Disclosure - Fair Value Measurements (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details) Sheet http://eplweb.com/role/DisclosureFairValueMeasurementsScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsDetails Fair Value Measurements (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details) Details http://eplweb.com/role/DisclosureFairValueMeasurementsTables 35 false false R36.htm 40801 - Disclosure - Income Taxes (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureIncomeTaxesNarrativeDetails Income Taxes (Narrative) (Details) Details http://eplweb.com/role/DisclosureIncomeTaxes 36 false false R37.htm 40901 - Disclosure - Related Party Transactions (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureRelatedPartyTransactionsNarrativeDetails Related Party Transactions (Narrative) (Details) Details http://eplweb.com/role/DisclosureRelatedPartyTransactions 37 false false R38.htm 41001 - Disclosure - Commitments and Contingencies (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureCommitmentsAndContingenciesNarrativeDetails Commitments and Contingencies (Narrative) (Details) Details http://eplweb.com/role/DisclosureCommitmentsAndContingencies 38 false false R39.htm 41101 - Disclosure - Supplemental Condensed Consolidating Financial Information (Narrative) (Details) Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationNarrativeDetails Supplemental Condensed Consolidating Financial Information (Narrative) (Details) Details http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationTables 39 false false R40.htm 41102 - Disclosure - Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Balance Sheet) (Details) Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationSupplementalCondensedConsolidatingBalanceSheetDetails Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Balance Sheet) (Details) Details http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationTables 40 false false R41.htm 41103 - Disclosure - Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Operations) (Details) Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationSupplementalCondensedConsolidatingStatementOfOperationsDetails Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Operations) (Details) Details http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationTables 41 false false R42.htm 41104 - Disclosure - Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Cash Flows) (Details) Sheet http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationSupplementalCondensedConsolidatingStatementOfCashFlowsDetails Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Cash Flows) (Details) Details http://eplweb.com/role/DisclosureSupplementalCondensedConsolidatingFinancialInformationTables 42 false false All Reports Book All Reports In ''Consolidated Balance Sheets'', column(s) 3, 4 are contained in other reports, so were removed by flow through suppression. epl-20150930.xml epl-20150930_cal.xml epl-20150930_def.xml epl-20150930_lab.xml epl-20150930_pre.xml epl-20150930.xsd true true