XML 106 R85.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Reportable Segments (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Reconciliation of NOI |  |  |
Rental income | $ 2,422,233 | $ 2,736,578 | $ 2,605,311
Property and maintenance expense | (406,823) | (479,160) | (473,098)
Real estate taxes and insurance expense | (317,387) | (339,802) | (325,401)
Total operating expenses | (724,210) | (818,962) | (798,499)
Net operating income | 1,698,023 | 1,917,616 | 1,806,812
Rental income: |  |  |
Rental Income - same store | 2,177,304 | 2,099,166 | 2,441,390
Rental Income - non-same store | 244,929 | 637,412 | 163,921
Rental Income | 2,422,233 | 2,736,578 | 2,605,311
Operating expenses: |  |  |
Operating Expenses - same store | 634,120 | 613,924 | 744,096
Operating Expenses - non-same store | 90,090 | 205,038 | 54,403
Total operating expenses | 724,210 | 818,962 | 798,499
NOI: |  |  |
NOI - same store | 1,543,184 | 1,485,242 | 1,697,294
NOI - non-same store | 154,839 | 432,374 | 109,518
Net operating income | $ 1,698,023 | $ 1,917,616 | $ 1,806,812
Units in same store properties | 69,879 | 69,879 | 96,286
Total Assets | $ 20,704,148 | $ 23,110,196 |
Capital Expenditures | 172,177 | 182,113 |
Same store (1) |  |  |
NOI: |  |  |
Total Assets | 16,648,892 | 17,105,124 |
Capital Expenditures | 156,188 | 137,331 |
Non-same store/other (2) (3) |  |  |
Rental income: |  |  |
Rental Income - non-same store | 163,768 | 72,123 | $ 83,715
Operating expenses: |  |  |
Operating Expenses - non-same store | 56,403 | 27,078 | 28,992
NOI: |  |  |
NOI - non-same store | 107,365 | 45,045 | 54,723
Total Assets | 2,864,250 | 2,441,637 |
Capital Expenditures | 12,179 | 6,341 |
Los Angeles | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 368,734 | 349,285 | 259,437
Operating expenses: |  |  |
Operating Expenses - same store | 107,138 | 104,614 | 81,972
NOI: |  |  |
NOI - same store | 261,596 | 244,671 | 177,465
Total Assets | 2,513,979 | 2,586,859 |
Capital Expenditures | 26,195 | 22,015 |
San Diego | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 88,049 | 83,491 | 79,217
Operating expenses: |  |  |
Operating Expenses - same store | 23,489 | 22,938 | 22,605
NOI: |  |  |
NOI - same store | 64,560 | 60,553 | 56,612
Total Assets | 471,937 | 488,260 |
Capital Expenditures | 5,172 | 4,608 |
Orange County | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 79,602 | 75,068 | 71,440
Operating expenses: |  |  |
Operating Expenses - same store | 18,931 | 18,550 | 18,211
NOI: |  |  |
NOI - same store | 60,671 | 56,518 | 53,229
Total Assets | 260,918 | 268,479 |
Capital Expenditures | 6,747 | 7,336 |
Subtotal - Southern California | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 536,385 | 507,844 | 410,094
Operating expenses: |  |  |
Operating Expenses - same store | 149,558 | 146,102 | 122,788
NOI: |  |  |
NOI - same store | 386,827 | 361,742 | 287,306
Total Assets | 3,246,834 | 3,343,598 |
Capital Expenditures | 38,114 | 33,959 |
New York | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 457,882 | 450,460 | 455,598
Operating expenses: |  |  |
Operating Expenses - same store | 160,772 | 152,682 | 156,881
NOI: |  |  |
NOI - same store | 297,110 | 297,778 | 298,717
Total Assets | 4,275,930 | 4,383,354 |
Capital Expenditures | 25,329 | 18,170 |
Washington D.C. | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 424,055 | 417,985 | 451,973
Operating expenses: |  |  |
Operating Expenses - same store | 126,154 | 123,450 | 131,964
NOI: |  |  |
NOI - same store | 297,901 | 294,535 | 320,009
Total Assets | 3,916,264 | 4,023,474 |
Capital Expenditures | 33,867 | 33,455 |
San Francisco | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 365,019 | 343,089 | 340,252
Operating expenses: |  |  |
Operating Expenses - same store | 88,141 | 84,603 | 96,217
NOI: |  |  |
NOI - same store | 276,878 | 258,486 | 244,035
Total Assets | 2,441,256 | 2,506,004 |
Capital Expenditures | 24,411 | 25,104 |
Boston | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 237,683 | 232,462 | 244,612
Operating expenses: |  |  |
Operating Expenses - same store | 66,283 | 67,252 | 70,070
NOI: |  |  |
NOI - same store | 171,400 | 165,210 | 174,542
Total Assets | 1,723,942 | 1,774,181 |
Capital Expenditures | 20,936 | 17,355 |
Seattle | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 154,482 | 145,646 | 153,197
Operating expenses: |  |  |
Operating Expenses - same store | 42,644 | 39,307 | 45,781
NOI: |  |  |
NOI - same store | 111,838 | 106,339 | 107,416
Total Assets | 1,031,764 | 1,061,351 |
Capital Expenditures | 13,464 | 9,106 |
Other Markets | Same store (1) |  |  |
Rental income: |  |  |
Rental Income - same store | 1,798 | 1,680 | 385,664
Operating expenses: |  |  |
Operating Expenses - same store | 568 | 528 | 120,395
NOI: |  |  |
NOI - same store | 1,230 | 1,152 | 265,269
Total Assets | 12,902 | 13,162 |
Capital Expenditures | 67 | 182 |
Other (3) |  |  |
NOI: |  |  |
Total Assets | 1,191,006 | 3,563,435 |
Capital Expenditures | 3,810 | 38,441 |
Other (3) | Non-same store/other (2) (3) |  |  |
Rental income: |  |  |
Rental Income - non-same store | 81,161 | 565,289 | 80,206
Operating expenses: |  |  |
Operating Expenses - non-same store | 33,687 | 177,960 | 25,411
NOI: |  |  |
NOI - non-same store | 47,474 | 387,329 | $ 54,795
Total Assets | 4,055,256 | 6,005,072 |
Capital Expenditures | $ 15,989 | $ 44,782 |

X
- Definition Total number of units associated with properties acquired or completed and stabilized two or more fiscal years ago, less properties subsequently sold. + References No definition available. + Details
Name: | eqr_NumberOfUnitsInSameStoreProperties
Namespace Prefix: | eqr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental Income. + References No definition available. + Details
Name: | eqr_RentalIncomeAbstract
Namespace Prefix: | eqr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reportable Segments. + References No definition available. + Details
Name: | eqr_ReportableSegmentsTextualsAbstract
Namespace Prefix: | eqr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental income less total operating expenses including property and maintenance expense, real estate taxes and insurance expense and property management expense for reportable segments. + References No definition available. + Details
Name: | eqr_SegmentReportingInformationNetOperatingIncome
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net Operating Income. + References No definition available. + Details
Name: | eqr_SegmentReportingInformationNetOperatingIncomeAbstract
Namespace Prefix: | eqr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental income less total operating expenses including property and maintenance expense, real estate taxes and insurance expense and property management expense for properties acquired during the last two fiscal years, plus any properties in lease-up and not stabilized within the last two fiscal years. + References No definition available. + Details
Name: | eqr_SegmentReportingInformationNonSameStoreNetOperatingIncome
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References No definition available. + Details
Name: | eqr_SegmentReportingInformationRevenues
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Rental income less total operating expenses including property and maintenance expense, real estate taxes and insurance expense and property management expense for properties acquired or completed and stabilized two or more fiscal years ago, less properties subsequently sold. + References No definition available. + Details
Name: | eqr_SegmentReportingInformationSameStoreNetOperatingIncome
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Property and maintenance expense, real estate taxes and insurance expense and property management expense for properties acquired during the last two fiscal years, plus any properties in lease-up and not stabilized within the last two fiscal years. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentNonSameStoreOperatingExpenses
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue for properties acquired during the past two fiscal years, plus any properties in lease-up and not stabilized within the last two fiscal years. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentNonSameStoreRentalIncome
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total property and maintenance expense, real estate taxes and insurance expense and property management expense for reportable segments. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentOperatingExpenses
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Operating expenses. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentOperatingExpensesAbstract
Namespace Prefix: | eqr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Property and maintenance expense, real estate taxes and insurance expense and property management expense for properties acquired or completed and stabilized two or more fiscal years ago, less properties subsequently sold. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentSameStoreOperatingExpenses
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue for properties acquired two or more fiscal years ago, less properties subsequently sold. + References No definition available. + Details
Name: | eqr_SegmentReportingSegmentSameStoreRentalIncome
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total property and maintenance expense, real estate taxes and insurance expense and property management expense. + References No definition available. + Details
Name: | eqr_TotalOperatingExpenses
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_CostOfPropertyRepairsAndMaintenance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow from the acquisition of or improvements to long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
Name: | us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate total of real estate taxes and insurance expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843 + Details
Name: | us-gaap_RealEstateTaxesAndInsurance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eqr_SameStoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=eqr_NonsamestoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_LosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_SanDiegoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_OrangeCountyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_SouthernCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_NY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_DC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_SanFranciscoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_BostonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_SeattleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_NonCoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=eqr_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |