XML 46 R30.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Significant Transactions During the Third Quarter of 2016 and Subsequent Events (Details) $ in Millions | 1 Months Ended |
--- | --- | ---
Sep. 30, 2016 USD ($) apartment | May 31, 2016 apartment | Aug. 31, 2016 USD ($)
Preferred Equity Investment In Limited Liability Company [Member] | 624 Yale Apartments [Member] |  |  |
Other Commitments [Line Items] |  |  |
Other commitment |  |  | $ 11.6
Number of units acquired (in number of units) | apartment |  | 228 |
Preferred stock, stated interest percentage |  | 12.00% |
Commitment, funded amount | $ 1.9 |  |
Loan Commitment In Limited Liability Company [Member] |  |  |
Other Commitments [Line Items] |  |  |
Other commitment | $ 26.3 |  |
Number of units acquired (in number of units) | apartment | 216 |  |
Note receivable, interest rate (as a percent) | 10.75% |  |
Commitment, funded amount | $ 4.4 |  |

X
- Definition Number of units acquired. + References No definition available. + Details
Name: | ess_NumberOfUnitsAcquired
Namespace Prefix: | ess_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Commitment, Funded Amount + References No definition available. + Details
Name: | ess_OtherCommitmentFundedAmount
Namespace Prefix: | ess_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other Commitment, Note Receivable, Interest Rate + References No definition available. + Details
Name: | ess_OtherCommitmentNoteReceivableInterestRate
Namespace Prefix: | ess_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=ess_PreferredEquityInvestmentInLimitedLiabilityCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ess_A624YaleApartmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=ess_LoanCommitmentInLimitedLiabilityCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |