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CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands | Total | Series K Preferred Stock [Member] | ERPOP [Member] | ERPOP [Member] Series K Preferred Stock [Member] | PREFERRED SHARES ERPOP [Member] | PREFERRED SHARES ERPOP [Member] Series K Preferred Stock [Member] | General Partner [Member] ERPOP [Member] | Limited Partner [Member] ERPOP [Member] | ACCUMULATED OTHER COMPREHENSIVE (LOSS) ERPOP [Member] | PARTIALLY OWNED PROPERTIES ERPOP [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2013 |  |  |  |  | $ 50,000 |  | $ 10,612,363 | $ 211,412 | $ (155,162) |
Balance, beginning of year at Dec. 31, 2013 |  |  |  |  |  |  |  |  |  | $ 126,583
Preference Units |  |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  |  |  | 0 |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  |  |  | 8.29% |  |  |  |
OP Unit Issuance: |  |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 2,365 | (2,365) |  |
Exercise of EQR share options |  |  |  |  |  |  | 82,573 |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  |  |  |  | 3,392 |  |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | 0 | 0 |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  |  |  | 9,904 |  |  |
EQR share options |  |  |  |  |  |  | 7,349 |  |  |
EQR ESPP discount |  |  |  |  |  |  | 859 |  |  |
OP Units repurchased and retired |  |  |  |  |  |  | (1,777) |  |  |
Net income available to Units – General Partner |  |  | $ 627,163 |  |  |  | 627,163 |  |  |
OP Units – General Partner distributions |  |  |  |  |  |  | (723,782) |  |  |
Offering costs |  |  |  |  |  |  | (41) |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  |  |  | 7,374 |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | (2,308) |  |  | (2,244)
Change in market value of Redeemable Limited Partners |  |  |  |  |  |  | (139,818) |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  |  |  | 4,992 |  |  |
LIMITED PARTNERS |  |  |  |  |  |  |  |  |  |
Issuance of restricted units to Limited Partners |  |  |  |  |  |  |  | 3 |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 2,365 | (2,365) |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | 0 | 0 |  |
Equity compensation associated with Units – Limited Partners |  |  |  |  |  |  |  | 11,969 |  |
Net income available to Units – Limited Partners |  |  | 24,831 |  |  |  |  | 24,831 |  |
Units – Limited Partners distributions |  |  |  |  |  |  |  | (28,676) |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  |  |  | 2,229 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  |  |  |  |  |  | (4,992) |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |  |
Unrealized holding (losses) gains arising during the year | $ (33,306) |  | (33,306) |  |  |  |  |  | (33,306) |
Losses reclassified into earnings from other comprehensive income | (16,868) |  | (16,868) |  |  |  |  |  | 16,868 |
Accumulated other comprehensive income (loss) – foreign currency: |  |  |  |  |  |  |  |  |  |
Currency translation adjustments arising during the year | (552) |  | (552) |  |  |  |  |  | (552) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 658,683 |  | 658,683 |  |  |  |  |  |  | 2,544
Contributions by Noncontrolling Interests | 5,684 |  | 5,684 |  |  |  |  |  |  | 5,684
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | (7,827)
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | (2,308) |  |  | (2,244)
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0
Other |  |  |  |  |  |  |  |  |  | 169
Balance, end of year at Dec. 31, 2014 |  |  |  |  | 50,000 |  | 10,490,608 | 214,411 | (172,152) |
Balance, end of year at Dec. 31, 2014 |  |  |  |  |  |  |  |  |  | 124,909
Preference Units |  |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  |  |  | (12,720) |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  | 8.29% |  | 0.00% |  |  |  |
OP Unit Issuance: |  |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 4,966 | (4,966) |  |
Exercise of EQR share options |  |  |  |  |  |  | 59,508 |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  |  |  |  | 4,404 |  |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | (70) | 70 |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  |  |  | 15,066 |  |  |
EQR share options |  |  |  |  |  |  | 3,756 |  |  |
EQR ESPP discount |  |  |  |  |  |  | 884 |  |  |
OP Units repurchased and retired |  |  |  |  |  |  | 0 |  |  |
Net income available to Units – General Partner |  |  | 863,277 |  |  |  | 863,277 |  |  |
OP Units – General Partner distributions |  |  |  |  |  |  | (804,825) |  |  |
Offering costs |  |  |  |  |  |  | (79) |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  |  |  | 1,380 |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | 0 |  |  | 0
Change in market value of Redeemable Limited Partners |  |  |  |  |  |  | (64,378) |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  |  |  | 10,607 |  |  |
LIMITED PARTNERS |  |  |  |  |  |  |  |  |  |
Issuance of restricted units to Limited Partners |  |  |  |  |  |  |  | 3 |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 4,966 | (4,966) |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | (70) | 70 |  |
Equity compensation associated with Units – Limited Partners |  |  |  |  |  |  |  | 21,503 |  |
Net income available to Units – Limited Partners |  |  | 34,241 |  |  |  |  | 34,241 |  |
Units – Limited Partners distributions |  |  |  |  |  |  |  | (31,604) |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  |  |  | (1,672) |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  |  |  |  |  |  | (10,607) |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |  |
Unrealized holding (losses) gains arising during the year | 2,219 |  | 2,219 |  |  |  |  |  | 2,219 |
Losses reclassified into earnings from other comprehensive income | (18,244) |  | (18,244) |  |  |  |  |  | 18,244 |
Accumulated other comprehensive income (loss) – foreign currency: |  |  |  |  |  |  |  |  |  |
Currency translation adjustments arising during the year | (327) |  | (327) |  |  |  |  |  | (327) |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 908,018 |  | 908,018 |  |  |  |  |  |  | 3,657
Contributions by Noncontrolling Interests | 0 |  | 0 |  |  |  |  |  |  | 0
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | (6,608)
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | 0 |  |  | 0
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  |  | (117,350)
Other |  |  |  |  |  |  |  |  |  | 0
Balance, end of year at Dec. 31, 2015 |  |  |  |  | 37,280 |  | 10,585,104 | 221,379 | (152,016) |
Balance, end of year at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  | 4,608
Preference Units |  |  |  |  |  |  |  |  |  |
Partial redemption of 8.29% Series K Cumulative Redeemable |  |  |  |  | 0 |  |  |  |  |
Preferred Stock Preference Units Dividend Rate Percentage |  | 8.29% |  | 8.29% |  | 8.29% |  |  |  |
OP Unit Issuance: |  |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 3,726 | (3,726) |  |
Exercise of EQR share options |  |  |  |  |  |  | 35,833 |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  |  |  |  | 3,686 |  |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | 0 | 0 |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  |  |  | 15,016 |  |  |
EQR share options |  |  |  |  |  |  | 3,432 |  |  |
EQR ESPP discount |  |  |  |  |  |  | 650 |  |  |
OP Units repurchased and retired |  |  |  |  |  |  | 0 |  |  |
Net income available to Units – General Partner |  |  | 4,289,072 |  |  |  | 4,289,072 |  |  |
OP Units – General Partner distributions |  |  |  |  |  |  | (4,754,537) |  |  |
Offering costs |  |  |  |  |  |  | (314) |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  |  |  | 748 |  |  |
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | 0 |  |  | 0
Change in market value of Redeemable Limited Partners |  |  |  |  |  |  | 115,093 |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  |  |  | 8,198 |  |  |
LIMITED PARTNERS |  |  |  |  |  |  |  |  |  |
Issuance of restricted units to Limited Partners |  |  |  |  |  |  |  | 1 |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  |  |  | 3,726 | (3,726) |  |
Conversion of EQR restricted shares to restricted units |  |  |  |  |  |  | 0 | 0 |  |
Equity compensation associated with Units – Limited Partners |  |  |  |  |  |  |  | 18,180 |  |
Net income available to Units – Limited Partners |  |  | 171,511 |  |  |  |  | 171,511 |  |
Units – Limited Partners distributions |  |  |  |  |  |  |  | (187,448) |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  |  |  | 9,598 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  |  |  |  |  |  | (8,198) |  |
Accumulated other comprehensive income (loss) – derivative instruments: |  |  |  |  |  |  |  |  |  |
Unrealized holding (losses) gains arising during the year | (3,915) |  | (3,915) |  |  |  |  |  | (3,915) |
Losses reclassified into earnings from other comprehensive income | (41,758) |  | (41,758) |  |  |  |  |  | 41,758 |
Accumulated other comprehensive income (loss) – foreign currency: |  |  |  |  |  |  |  |  |  |
Currency translation adjustments arising during the year | 264 |  | 264 |  |  |  |  |  | 264 |
PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 4,480,104 |  | 4,480,104 |  |  |  |  |  |  | 16,430
Contributions by Noncontrolling Interests | $ 0 |  | $ 0 |  |  |  |  |  |  | 0
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | (36,268)
Acquisition of Noncontrolling Interests – Partially Owned Properties |  |  |  |  |  |  | 0 |  |  | 0
Deconsolidation of previously consolidated Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0
Other |  |  |  |  |  |  |  |  |  | 25,839
Balance, end of year at Dec. 31, 2016 |  |  |  |  | $ 37,280 |  | $ 10,305,707 | $ 221,297 | $ (113,909) |
Balance, end of year at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  | $ 10,609

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