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Organization and Basis of Presentation (Details 4) (USD $) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2015 | Dec. 31, 2014 | Nov. 16, 2012 | Jun. 01, 2011
Fair Value of Financial Instruments |  |  |  |  |
Notes receivable |  | $ 13,491,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | $ 14,009,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures |  |
Reclassifications |  |  |  |  |
Entertainment revenues reclassified from food, beverage and entertainment revenues | 700,000 eri_FoodAndBeverageRevenueReclassifiedToEntertainmentRevenue |  |  |  |
Entertainment expenses reclassified from other expenses | 500,000 eri_OtherGeneralExpenseReclassifiedToEntertainmentExpenses |  |  |  |
Marketing and promotions costs reclassified to a separate line items from casino expenses | 3,500,000 eri_MarketingAndAdvertisingExpenseReclassifiedToSeparateLineItemFromCasinoExpenses |  |  |  |
Marketing and promotions costs reclassified to a separate line items from general and administrative expenses | 600,000 eri_MarketingAndAdvertisingExpenseReclassifiedToSeparateLineItemFromGeneralAndAdministrativeExpense |  |  |  |
Valet related expenses reclassified to other expenses from general and administrative expenses | 200,000 eri_ValetRelatedExpensesReclassifiedToOtherExpenses |  |  |  |
Acquisition-Related Contingent Considerations |  |  |  |  |
Change in acquisition-related contingent consideration liabilities |  |  |  |  |
Balance at the beginning of the period |  | 524,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = eri_AcquisitionRelatedContingentConsiderationMember |  |  |
Amortization of present value discount |  | 16,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings / us-gaap_FairValueByLiabilityClassAxis = eri_AcquisitionRelatedContingentConsiderationMember |  |  |
Fair value adjustment for change in consideration expected to be paid |  | 6,000 eri_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisContingentConsiderationFairValueAdjustment / us-gaap_FairValueByLiabilityClassAxis = eri_AcquisitionRelatedContingentConsiderationMember |  |  |
Balance at the end of the period |  | 546,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByLiabilityClassAxis = eri_AcquisitionRelatedContingentConsiderationMember |  |  |
Carrying Amount |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 71,913,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 87,604,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |
Restricted cash |  | 8,357,000 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 8,234,000 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |
Financial liabilities: |  |  |  |  |
Acquisition-related contingent considerations |  | 546,000 eri_BusinessAcquisitionContingentConsiderationFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 524,000 eri_BusinessAcquisitionContingentConsiderationFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |
Carrying Amount | 8.625% Senior Secured Notes |  |  |  |  |
Financial liabilities: |  |  |  |  |
Long-term debt |  | 168,000,000 us-gaap_LongTermDebtFairValue / us-gaap_FairValueByLiabilityClassAxis = eri_Senior8.625SecuredNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 168,000,000 us-gaap_LongTermDebtFairValue / us-gaap_FairValueByLiabilityClassAxis = eri_Senior8.625SecuredNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |
Carrying Amount | 11.5% Senior Secured Second Lien Notes |  |  |  |  |
Financial liabilities: |  |  |  |  |
Term loan |  | 608,090,000 us-gaap_LoansPayableFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = eri_Senior11.5SecuredSecondLienNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | 610,827,000 us-gaap_LoansPayableFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = eri_Senior11.5SecuredSecondLienNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |  |
Fair Value |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 71,913,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 87,604,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
Restricted cash |  | 8,357,000 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 8,234,000 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
Advance to Silver Legacy Joint Venture |  | 5,067,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 4,911,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
Financial liabilities: |  |  |  |  |
Acquisition-related contingent considerations |  | 546,000 eri_BusinessAcquisitionContingentConsiderationFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 524,000 eri_BusinessAcquisitionContingentConsiderationFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
Fair Value | 8.625% Senior Secured Notes |  |  |  |  |
Financial liabilities: |  |  |  |  |
Long-term debt |  | 175,980,000 us-gaap_LongTermDebtFairValue / us-gaap_FairValueByLiabilityClassAxis = eri_Senior8.625SecuredNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 174,720,000 us-gaap_LongTermDebtFairValue / us-gaap_FairValueByLiabilityClassAxis = eri_Senior8.625SecuredNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
Fair Value | 11.5% Senior Secured Second Lien Notes |  |  |  |  |
Financial liabilities: |  |  |  |  |
Term loan |  | 608,321,000 us-gaap_LoansPayableFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = eri_Senior11.5SecuredSecondLienNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 606,919,000 us-gaap_LoansPayableFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = eri_Senior11.5SecuredSecondLienNotesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |  |
ELLC | Silver Legacy Joint Venture |  |  |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Notes receivable |  |  |  | $ 7,500,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = eri_EldoradoLimitedLiabilityCompanyMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = eri_SilverLegacyJointVentureMember |
8.625% Resorts Senior Secured Notes | Resorts |  |  |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Interest rate (as a percent) |  | 8.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredNotes8.625PercentMember / dei_LegalEntityAxis = eri_EldoradoResortsLLCMember | 8.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredNotes8.625PercentMember / dei_LegalEntityAxis = eri_EldoradoResortsLLCMember |  | 8.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredNotes8.625PercentMember / dei_LegalEntityAxis = eri_EldoradoResortsLLCMember
Senior Secured Second Lien Notes | MTR Gaming |  |  |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Interest rate (as a percent) |  | 11.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredSecondLienNotes11.5PercentMember / dei_LegalEntityAxis = eri_MTRGamingGroupIncMember | 11.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredSecondLienNotes11.5PercentMember / dei_LegalEntityAxis = eri_MTRGamingGroupIncMember |  |
Level 2 | 8.625% Resorts Senior Secured Notes | Resorts |  |  |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Interest rate (as a percent) |  | 8.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredNotes8.625PercentMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / dei_LegalEntityAxis = eri_EldoradoResortsLLCMember |  |  |
Level 2 | Senior Secured Second Lien Notes | MTR Gaming |  |  |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Interest rate (as a percent) |  | 11.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eri_SeniorSecuredSecondLienNotes11.5PercentMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / dei_LegalEntityAxis = eri_MTRGamingGroupIncMember |  |  |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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