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Ground Leases - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Schedule of Operating Leases [Line Items] |  |  |
Operating Leases, Rent Expense | $ 3,700,000 us-gaap_LeaseAndRentalExpense | $ 5,100,000 us-gaap_LeaseAndRentalExpense | $ 4,600,000 us-gaap_LeaseAndRentalExpense
Operating Leases, Future Minimum Payments Due | 33,130,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |
Operating Leases, Future Minimum Payments Due, Next Twelve Months | 3,803,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |  |
Operating Leases, Future Minimum Payments, Due in Two Years | 3,909,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |
Operating Leases, Future Minimum Payments Receivable, in Three Years | 3,948,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |
Description of Lessor Leasing Arrangements, Operating Leases | The majority of the lease terms require twelve equal payments per year plus additional rents calculated as a percentage of gross revenues. |  |
Operating Lease terms | 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. |  |
Operating Leases, Future Minimum Payments, Due in Four Years | 3,994,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |
Operating Leases, Future Minimum Payments Receivable, in Five Years | 3,888,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |
Operating Leases, Future Minimum Payments, Due Thereafter | 13,588,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |  |
Corporate Office Lease [Member] |  |  |
Schedule of Operating Leases [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | 13,692,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Operating Leases, Future Minimum Payments Due, Next Twelve Months | 1,862,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Operating Leases, Future Minimum Payments, Due in Two Years | 1,961,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Operating Leases, Future Minimum Payments Receivable, in Three Years | 1,993,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Ground leases, expiration period year | 2023 |  |
Operating Leases, Future Minimum Payments, Due in Four Years | 2,039,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Operating Leases, Future Minimum Payments Receivable, in Five Years | 1,925,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Operating Leases, Future Minimum Payments, Due Thereafter | 3,912,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_LeaseArrangementTypeAxis = els_OfficeLeaseMember |  |
Ground Lease [Member] |  |  |
Schedule of Operating Leases [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | 19,438,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments Due, Next Twelve Months | 1,941,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments, Due in Two Years | 1,948,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments Receivable, in Three Years | 1,955,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments, Due in Four Years | 1,955,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments Receivable, in Five Years | 1,963,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Operating Leases, Future Minimum Payments, Due Thereafter | $ 9,676,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_LeaseArrangementTypeAxis = els_GroundLeaseMember |  |
Ground Lease [Member] | Minimum |  |  |
Schedule of Operating Leases [Line Items] |  |  |
Ground leases, expiration period year | 2015 |  |
Ground Lease [Member] | Maximum |  |  |
Schedule of Operating Leases [Line Items] |  |  |
Ground leases, expiration period year | 2054 |  |

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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 A general description of the nature of the existing leasing arrangements of a lessor for all operating leases including, but not limited to: (1) guarantees or indemnities; (2) restrictions imposed by lease arrangements; (3) unusual provisions or conditions; (4) contingent rentals; and (5) 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 4 -URI http://asc.fasb.org/extlink&oid=6452767&loc=d3e37045-112695 + 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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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 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 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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