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Changes In Accumulated Depreciation (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]      
Rental Home Depreciation Expense $ 10,900,000els_RentalHomeDepreciationExpense $ 6,500,000els_RentalHomeDepreciationExpense $ 5,600,000els_RentalHomeDepreciationExpense
Beginning Balance 1,058,540,000us-gaap_RealEstateAccumulatedDepreciation 948,581,000us-gaap_RealEstateAccumulatedDepreciation 807,329,000us-gaap_RealEstateAccumulatedDepreciation
Depreciation on real estate assets and rental homes 111,065,000els_RealEstateDepreciationExpenseAndRentalHomes 108,229,000els_RealEstateDepreciationExpenseAndRentalHomes 102,083,000els_RealEstateDepreciationExpenseAndRentalHomes
Amortization of Intangible Assets for Continuing Operations 3,999,000els_AmortizationofIntangibleAssetsforContinuingOperations 1,940,000els_AmortizationofIntangibleAssetsforContinuingOperations 39,467,000els_AmortizationofIntangibleAssetsforContinuingOperations
Dispositions and other (4,112,000)els_RealEstateAndAccumulatedDepreciationAccumulatedDepreciationDispositionsAndOther (210,000)els_RealEstateAndAccumulatedDepreciationAccumulatedDepreciationDispositionsAndOther (298,000)els_RealEstateAndAccumulatedDepreciationAccumulatedDepreciationDispositionsAndOther
Ending Balance $ 1,169,492,000us-gaap_RealEstateAccumulatedDepreciation $ 1,058,540,000us-gaap_RealEstateAccumulatedDepreciation $ 948,581,000us-gaap_RealEstateAccumulatedDepreciation