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Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) Rate
Derivative [Line Items]
Interest rate at period end (in percentage)	4.01%
Loss reclassified from accumulated OCI into income, net | $	$ 0.2
2014 Swap | Term Loans
Derivative [Line Items]
Fixed interest rate (in percentage)	1.04%
Derivative, Fixed Interest Rate, Term	3 years
Maturity date	Aug. 01, 2017
Basis spread on variable rate (in percentage)	1.35%
Interest rate at period end (in percentage)	2.39%

X

- Definition

Derivative, Fixed Interest Rate, Term

+ References

No definition available.

+ Details

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Namespace Prefix:	els_
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Balance Type:	na
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X

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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X

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Details

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- Details

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