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Equity Incentive Awards - Additional Information (Detail) (USD $) | 12 Months Ended | 1 Months Ended | 3 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 31, 2014 | May 13, 2014 | May 31, 2013 | Mar. 31, 2013 | Jan. 31, 2013 | May 08, 2012 | Jan. 31, 2012 | Apr. 30, 2013 | Feb. 28, 2013 | Sep. 30, 2012 | Feb. 02, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 1,085,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,085,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,105,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,265,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 2 years 1 month 1 day | 3 years 1 month 1 day | 4 years 6 days | 4 years 10 months 21 days |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 3,563,334 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross | 186,666 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross | 173,332 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross | 214,664 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited |  |  | (36,666)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | $ 500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | $ 1,700,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | 32,100,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | 15,500,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | 13,100,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 3,750,000 us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights |  |  |  |  | One-third | One-third | One-third | One-third | One-third | One-third | One-third |  |  |  |
Senior Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights |  |  |  |  | Full |  |  |  |  |  | Full | Full | Full |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation expense, restricted stock grant | 7,600,000 us-gaap_AllocatedShareBasedCompensationExpense / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember | 6,000,000 us-gaap_AllocatedShareBasedCompensationExpense / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember | 5,800,000 us-gaap_AllocatedShareBasedCompensationExpense / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation expense to be recognized | 3,700,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 5 months 3 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  | 62,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 40,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 40,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 62,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 32,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 62,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |  |  |  |
Share based compensation, fair market value |  |  |  |  | 2,600,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 1,700,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 1,700,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 24,800 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 2,200,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 1,100,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember | 2,200,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |  |  |  |
Restricted Stock [Member] | Senior Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  | 84,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |  |  |  |  | 120,664 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 2,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 68,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |
Share based compensation, fair market value |  |  |  |  | 3,600,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |  |  |  |  | 4,200,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 80,200 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 2,500,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |
Share based compensation, restricted stock, vesting date |  |  |  |  | Dec. 31, 2014 |  |  |  |  |  | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2013 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |
DeferredCompensationArrangementWithIndividualFairValueOfSharesCancelled |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 els_Deferredcompensationarrangementwithindividualfairvalueofsharescancelled / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodNetOfForfeitures | 100,900 els_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsgrantsinperiodnetofforfeitures / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | 99,788 els_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsgrantsinperiodnetofforfeitures / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | 94,020 els_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsgrantsinperiodnetofforfeitures / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | 94,020 els_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsgrantsinperiodnetofforfeitures / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | (185,554)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | (167,564)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | (177,998)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ 40.51 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 34.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 32.30 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  | $ 35.07 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 42.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 37.32 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 35.06 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 41.09 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 37.17 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | $ 32.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember | 27.75 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember |  |  |  |  |  |  |  |  |  |  |
Phase One [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  | Dec. 31, 2014 | Nov. 13, 2014 | Nov. 08, 2013 | Sep. 13, 2013 | Dec. 31, 2013 | Nov. 08, 2012 | Dec. 31, 2012 |  |  |  |
Phase Two [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  | Dec. 31, 2015 | May 13, 2015 | May 08, 2014 | Mar. 13, 2014 | Dec. 31, 2014 | May 08, 2013 | Dec. 31, 2013 |  |  |  |
Phase Three [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  | Dec. 31, 2016 | May 13, 2016 | May 08, 2015 | Mar. 13, 2015 | Dec. 31, 2015 | May 08, 2014 | Dec. 31, 2014 |  |  |  |
Subsequent Event [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  | One-third
Subsequent Event [Member] | Senior Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Full
Subsequent Event [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 47,100 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
Share based compensation, fair market value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,600,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
Subsequent Event [Member] | Restricted Stock [Member] | Senior Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 78,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember
Share based compensation, fair market value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,300,000 us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued / els_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis = us-gaap_RestrictedStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember
Share based compensation, restricted stock, vesting date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2015
Subsequent Event [Member] | Phase One [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2015
Subsequent Event [Member] | Phase Two [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2016
Subsequent Event [Member] | Phase Three [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation, restricted stock, vesting date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2017

X
- Definition The total fair value of shares cancelled/relinquished during the period under a deferred compensation arrangement. + References No definition available. + Details
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- Definition The number of shares (or other type of equity) issuable under an equity-based award plan pertaining to grants made during the period, net of forfeitures on other than stock (or unit) option plans. + References No definition available. + Details
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Period Type: | instant

X
- Definition Description of the period of time over which a director's right to exercise an award is no longer contingent on the passage of time, which may be expressed in a variety of ways (for example, in years, month and year). + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The total fair value of shares issued during the period under a deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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