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Transactions with Related Parties - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Related Party Transaction [Line Items] |  |  |
Operating Leases, Rent Expense | $ 3.7 us-gaap_LeaseAndRentalExpense | $ 5.1 us-gaap_LeaseAndRentalExpense | $ 4.6 us-gaap_LeaseAndRentalExpense
Percentage of ownership interests in Previleged Access | 92.10%els_PercentageOfOwnershipInterests | 91.60%els_PercentageOfOwnershipInterests |
Lease agreement, term | The leases entered into between the customer and us for the rental of a Site are generally month-to-month or for a period of one to ten years, renewable upon the consent of the parties or, in some instances, as provided by statute. |  |
Two North Riverside Plaza Joint Venture Limited Partnership [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Operating Leases, Rent Expense | 1.4 us-gaap_LeaseAndRentalExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = els_TwoNorthRiversidePlazaJointVentureLimitedPartnershipMember | 1.4 us-gaap_LeaseAndRentalExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = els_TwoNorthRiversidePlazaJointVentureLimitedPartnershipMember | 0.9 us-gaap_LeaseAndRentalExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = els_TwoNorthRiversidePlazaJointVentureLimitedPartnershipMember
Chief Executive Officer [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Due from (to) Related Party |  | $ 0.3 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ChiefExecutiveOfficerMember |

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- Definition The company's ownership percentage in the operating partnership. + References No definition available. + Details
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- Definition A general description of the nature of the existing leasing arrangements of a lessee for all operating leases including, but not limited to: (1) rental escalation clauses; (2) renewal or purchase options; (3) guarantees or indemnities, if any, (4) restrictions imposed by lease arrangements; (5) unusual provisions or conditions; (6) contingent rentals, if any; and (7) lease expiration dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 1) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 + Details
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- Details
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- Details
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- Details
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