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CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands | Total | ERPOP [Member] | PREFERRED SHARES ERPOP [Member] | General Partner [Member] | General Partner [Member] ERPOP [Member] | Limited Partner ERPOP [Member] | AOCI Attributable to Parent ERPOP [Member] | DISTRIBUTIONS [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 |  |  |  |  | 15,900 | (15,900) |  |  |
Exercise of EQR share options |  |  |  |  | 31,596 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | $ 3,744 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  | 9,777 |  |  |  |
EQR share options |  |  |  |  | 6,835 |  |  |  |
EQR ESPP discount |  |  |  |  | 747 |  |  |  |
Net income available to Units - General Partner |  | $ 600,363 |  |  | 600,363 |  |  |  |
OP Units - General Partner distributions |  |  |  |  | (740,459) |  |  |  |
Offering costs |  |  |  |  | (51) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | (594) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  |  | 41,916 |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 18,315 | (18,315) |  |  |
LIMITED PARTNERS |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 15,900 | (15,900) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  |  | 10,523 |  |  |
Net income available to Units - Limited Partners |  | 22,604 |  |  |  | 22,604 |  |  |
Units - Limited Partners distributions |  |  |  |  |  | (26,739) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  | 33,221 |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 18,315 | (18,315) |  |  |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | $ 6,439 | 6,439 |  |  |  |  | 6,439 |  |
Losses reclassified into earnings from other comprehensive income | (18,858) | (18,858) |  |  |  |  | 18,858 |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  |  | $ 2.015 |
NONCONTROLLING INTERESTS PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 628,381 | 628,381 |  |  |  |  |  |  | 2,323
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 125
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  | (8,349)
Balance, end of year at Dec. 31, 2017 |  |  | 37,280 |  | 10,293,796 | 226,691 | (88,612) |  |
Balance, end of year at Dec. 31, 2017 |  |  |  |  |  |  |  |  | 4,708
OP Unit Issuance: |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 4,098 | (4,098) |  |  |
Exercise of EQR share options |  |  |  |  | 30,655 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 3,879 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  | 8,258 |  |  |  |
EQR share options |  |  |  |  | 9,734 |  |  |  |
EQR ESPP discount |  |  |  |  | 767 |  |  |  |
Net income available to Units - General Partner |  | 654,445 |  |  | 654,445 |  |  |  |
OP Units - General Partner distributions |  |  |  |  | (796,212) |  |  |  |
Offering costs |  |  |  |  | (27) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | (454) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  |  | (13,922) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 5,893 | (5,893) |  |  |
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 |  |  |  |  | 4,098 | (4,098) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  |  | 14,009 |  |  |
Net income available to Units - Limited Partners |  | 24,939 |  |  |  | 24,939 |  |  |
Units - Limited Partners distributions |  |  |  |  |  | (28,682) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  | 1,771 |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 5,893 | (5,893) |  |  |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | 5,174 | 5,174 |  |  |  |  | 5,174 |  |
Losses reclassified into earnings from other comprehensive income | (18,452) | (18,452) |  |  |  |  | 18,452 |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  |  | 2.16 |
NONCONTROLLING INTERESTS PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | 685,192 | 685,192 |  |  |  |  |  |  | 2,718
Acquisition Noncontrolling Interests Partially Owned Properties |  |  |  |  |  |  |  |  | (13)
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 125
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  | (9,831)
Balance, end of year at Dec. 31, 2018 |  |  | 37,280 |  | 10,200,910 | 228,738 | (64,986) |  |
Balance, end of year at Dec. 31, 2018 |  |  |  |  |  |  |  |  | (2,293)
OP Unit Issuance: |  |  |  |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 10,410 | (10,410) |  |  |
Exercise of EQR share options |  |  |  |  | 77,785 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | $ 3,116 |  |  |  |  |
Share-based employee compensation expense: |  |  |  |  |  |  |  |  |
EQR restricted shares |  |  |  |  | 12,438 |  |  |  |
EQR share options |  |  |  |  | 2,675 |  |  |  |
EQR ESPP discount |  |  |  |  | 642 |  |  |  |
Net income available to Units - General Partner |  | 967,287 |  |  | 967,287 |  |  |  |
OP Units - General Partner distributions |  |  |  |  | (842,555) |  |  |  |
Offering costs |  |  |  |  | (991) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | (1,675) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  |  | (82,283) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 8,030 | (8,030) |  |  |
LIMITED PARTNERS |  |  |  |  |  |  |  |  |
Issuance of restricted units to Limited Partners |  |  |  |  |  | 2 |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 10,410 | (10,410) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  |  | 13,410 |  |  |
Net income available to Units - Limited Partners |  | 36,034 |  |  |  | 36,034 |  |  |
Units - Limited Partners distributions |  |  |  |  |  | (29,896) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  | (2,011) |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | 8,030 | (8,030) |  |  |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the year | (33,765) | (33,765) |  |  |  |  | (33,765) |  |
Losses reclassified into earnings from other comprehensive income | (21,188) | (21,188) |  |  |  |  | 21,188 |  |
DISTRIBUTIONS |  |  |  |  |  |  |  |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  |  | $ 2.27 |
NONCONTROLLING INTERESTS PARTIALLY OWNED PROPERTIES |  |  |  |  |  |  |  |  |
Net income attributable to Noncontrolling Interests | $ 1,009,708 | $ 1,009,708 |  |  |  |  |  |  | 3,297
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 7,337
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  | (7,158)
Balance, end of year at Dec. 31, 2019 |  |  | $ 37,280 |  | $ 10,355,789 | $ 227,837 | $ (77,563) |  |
Balance, end of year at Dec. 31, 2019 |  |  |  |  |  |  |  |  | $ 1,183

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