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Preferred Stock - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 14, 2012 | Dec. 31, 2014 | Dec. 31, 2012 | Dec. 31, 2013 | Sep. 30, 2012 | Dec. 30, 2014 | Dec. 30, 2013 | Oct. 18, 2012 | Mar. 31, 2015
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock Redeemed |  | 375 els_PreferredStockRedeemed |  |  |  |  |  |  |
Preferred Stock, shares authorized |  | 10,000,000 els_PreferredStockThatCanBeIssuedByBoardOfDirectorsWithoutStockholdersApproval |  |  |  |  |  |  |
Preferred Stock, par value per share |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare |  |  |  |  |
At The Market Offering Value |  |  |  |  | $ 125.0 els_AtMarketOfferingValue |  |  |  |
Preferred Stock, Shares Authorized |  | 9,765,900 us-gaap_PreferredStockSharesAuthorized |  | 9,765,525 us-gaap_PreferredStockSharesAuthorized |  |  |  |  |
Preferred Stock, Shares Issued |  | 0 us-gaap_PreferredStockSharesIssued |  | 0 us-gaap_PreferredStockSharesIssued |  |  |  |  |
Peferred Stock, Shares Exchanged | 5,445,765 els_PeferredStockSharesExchanged |  |  |  |  |  |  |  |
Depositary Shares, Issued | 5,445,765 els_DepositarySharesIssued |  |  |  |  |  |  |  |
Depositary Share, Liquidation Preference Per Share | $ 25.00 els_DepositaryShareLiquidationPreferencePerShare |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount | $ 0.3849625 us-gaap_PreferredStockDividendRatePerDollarAmount |  |  |  |  |  |  |  |
Cumulative Series D Six Percent Non-Qualified Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, par value per share |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  | 179,639 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  | 179,764 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  |  |  |  |
Preferred Stock, Shares Issued |  | 0 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  | 125 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  | 125 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember | 125 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  | $ 1,000.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember |  |
Cumulative Series E Eighteen Point Seven Five Percent Nonvoting Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, par value per share |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 18.75%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  | 0 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  | 250 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  |  |  |  |
Preferred Stock, Shares Issued |  | 0 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  | 250 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  | 250 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember | 250 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  | $ 1,000.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEEighteenPointSevenFivePercentNonvotingPreferredStockMember |  |
Cumulative Series C Six Point Seven Five Percent Redeemable Perpetual Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, par value per share |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 6.75%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  |  |  |  |  |  |
Preferred Stock, Shares Authorized | 54,458 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember | 54,461 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  | 54,461 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  |  |  |  |
Preferred Stock, Shares Issued |  | 54,458 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  | 54,458 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share | $ 2,500.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesCSixPointSevenFivePercentRedeemablePerpetualPreferredStockMember |  |  |  |  |  |  |  |
Cumulative Series Eight Point Zero Three Four Percent Redeemable Perpetual Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  |  | $ 25.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEightPointZeroThreeFourPercentRedeemablePerpetualPreferredStockMember |
Preferred Stock, Dividend Rate, Per-Dollar-Amount |  |  | $ 0.0948460 us-gaap_PreferredStockDividendRatePerDollarAmount / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEightPointZeroThreeFourPercentRedeemablePerpetualPreferredStockMember |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares |  |  | 2,554,235 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEightPointZeroThreeFourPercentRedeemablePerpetualPreferredStockMember |  |  |  |  |  |
Stock Redeemed or Called During Period, Value |  |  | $ 64.1 us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesEightPointZeroThreeFourPercentRedeemablePerpetualPreferredStockMember |  |  |  |  |  |
Subsequent Event [Member] | Cumulative Series D Six Percent Non-Qualified Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Auction Market Preferred Securities, Stock Series [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  |  |  |  |  |  | 179,639 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = els_CumulativeSeriesDSixPercentNonQualifiedPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X
- Definition The value of an offering program (at the market, "ATM) that provides a potentially efficient means of raising measured amounts of equity capital over time by allowing a company to tap into the existing secondary market for its shares on an as-and-when-needed basis. + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of depositary shares that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References No definition available. + Details
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- Definition A share presenting a fraction of the underlying share. A depositary share is entitled to any dividends or other benefits associated with the underlying share. + References No definition available. + Details
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- Definition Number of shares exchanged during the period as a result of the exchange of one issuance of preferred stock for another issuance of preferred stock. + References No definition available. + Details
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- Definition Preferred Stock Redeemed + References No definition available. + Details
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- Definition The number of preferred shares that are available for issue by the board of directors without further shareholder approval. + References No definition available. + Details
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- Definition Face amount or stated value per share of common stock. + 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 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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- Definition The amount per share used to calculated dividend payments on preferred stock. + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 5: 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.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition Equity impact of the value of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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