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Combined Results of Operations of Properties Held for Sale or Disposed (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Utility and other income	$ 70,209els_UtilityAndOtherIncome	$ 63,800els_UtilityAndOtherIncome	$ 62,470els_UtilityAndOtherIncome
Property operating expenses	(243,914)us-gaap_CostOfOtherPropertyOperatingExpense	(229,897)us-gaap_CostOfOtherPropertyOperatingExpense	(220,415)us-gaap_CostOfOtherPropertyOperatingExpense
Income from operations	272,198us-gaap_OperatingIncomeLoss	254,551us-gaap_OperatingIncomeLoss	206,443us-gaap_OperatingIncomeLoss
Income from home sales operations	28,418us-gaap_SalesOfRealEstate	17,871us-gaap_SalesOfRealEstate	8,230us-gaap_SalesOfRealEstate
Interest and related amortization	(112,295)us-gaap_InterestExpenseDebt	(118,522)us-gaap_InterestExpenseDebt	(123,992)us-gaap_InterestExpenseDebt
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	$ 41,525us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	$ 4,596us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax

X

- Definition

Reimbursable tenant utility and other income.

+ References

No definition available.

+ Details

Name:	els_UtilityAndOtherIncome
Namespace Prefix:	els_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Other operating costs incurred during the reporting period and may include amounts paid to maintain the property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_CostOfOtherPropertyOperatingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

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Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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