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CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands | Total | ERPOP [Member] | PREFERRED SHARES ERPOP [Member] | General Partner [Member] ERPOP [Member] | Limited Partner [Member] ERPOP [Member] | ACCUMULATED OTHER COMPREHENSIVE (LOSS) [Member] ERPOP [Member] | PARTIALLY OWNED PROPERTIES [Member] ERPOP [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2016 |  |  | $ 37,280 | $ 10,305,707 | $ 221,297 | $ (113,909) |
Balance, beginning of year at Dec. 31, 2016 |  |  |  |  |  |  | $ 10,609
OP Unit Issuance: |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  | 14,717 | (14,717) |  |
Exercise of EQR share options |  |  |  | 12,967 |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 2,963 |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |
EQR restricted shares |  |  |  | 7,489 |  |  |
EQR share options |  |  |  | 6,384 |  |  |
EQR ESPP discount |  |  |  | 586 |  |  |
Net income available to Units – General Partner |  | $ 475,694 |  | 475,694 |  |  |
OP Units – General Partner distributions |  |  |  | (555,071) |  |  |
Offering costs |  |  |  | (36) |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (594) |  |  |
Change in market value of Redeemable Limited Partners |  |  |  | 29,551 |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | 16,306 | (16,306) |  |
LIMITED PARTNERS |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  | 14,717 | (14,717) |  |
Equity compensation associated with Units – Limited Partners |  |  |  |  | 8,200 |  |
Net income available to Units – Limited Partners |  | 17,931 |  |  | 17,931 |  |
Units – Limited Partners distributions |  |  |  |  | (20,073) |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  | 32,000 |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | 16,306 | (16,306) |  |
Accumulated other comprehensive income – derivative instruments: |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period | $ 5,216 | 5,216 |  |  |  | 5,216 |
Losses reclassified into earnings from other comprehensive income | (14,019) | (14,019) |  |  |  | 14,019 |
NONCONTROLLING INTERESTS – PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 498,297 | 498,297 |  |  |  |  | 2,354
Contributions – Noncontrolling Interests – Partially Owned Properties | $ 125 | $ 125 |  |  |  |  | 125
Distributions to Noncontrolling Interests |  |  |  |  |  |  | (6,913)
Balance, end of period at Sep. 30, 2017 |  |  | $ 37,280 | $ 10,316,663 | $ 228,332 | $ (94,674) |
Balance, end of period at Sep. 30, 2017 |  |  |  |  |  |  | $ 6,175

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