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CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) (USD $) In Thousands, unless otherwise specified | Total | PREFERRED UNITS | General Partner [Member] | Limited Partner [Member] | Accumulated Other Comprehensive (Loss) | Partially Owned Properties [Member]
--- | --- | --- | --- | --- | --- | ---
Balance, beginning of year - Noncontrolling Interest at Dec. 31, 2013 |  |  |  |  |  | $ 126,583
Balance, beginning of year at Dec. 31, 2013 |  | 50,000 | 10,612,363 | 211,412 | (155,162) |
OP Unit Issuance: |  |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  | 1,718 | (1,718) |  |
Exercise of EQR share options |  |  | 56,554 |  |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan |  |  | 2,728 |  |  |
Share-based employee compensation expense: |  |  |  |  |  |
EQR restricted shares |  |  | 8,394 |  |  |
EQR share options |  |  | 6,326 |  |  |
EQR ESPP discount |  |  | 701 |  |  |
Payments For Repurchase Of Op Units |  |  | (1,777) |  |  |
Net income available to Units - General Partner |  |  | 410,460 |  |  |
OP Units - General Partner distributions |  |  | (542,374) |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  | 5,664 |  |  |
Acquisition Noncontrolling Interests Partially Owned Properties |  |  | (2,308) |  |  | (2,244)
Change in market value of Redeemable Limited Partners |  |  | (69,579) |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  | 4,272 | (4,272) |  |
Issuance of LTIP Units to Noncontrolling Interests |  |  |  | 3 |  |
Equity compensation associated with Units - Limited Partners |  |  |  | 11,144 |  |
Net Income (Loss) Allocated to Limited Partners |  |  |  | 16,273 |  |
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties | 1,800 |  |  |  |  | 1,800
Units - Limited Partners distributions |  |  |  | (21,527) |  | (6,795)
Change in carrying value of Redeemable Limited Partners |  |  |  | 2,574 |  |
Other comprehensive (loss) income – derivative instruments: |  |  |  |  |  |
Unrealized holding (losses) arising during the period | (21,784) |  |  |  | (21,784) |
Losses reclassified into earnings from other comprehensive income | (12,606) |  |  |  | 12,606 |
Currency translation adjustments arising during the period | (466) |  |  |  | (466) |
Contributions by Noncontrolling Interests | 5,684 |  |  |  |  | 5,684
Stockholders' Equity, Other |  |  |  |  |  | 169
Balance, end of period - Noncontrolling Interest at Sep. 30, 2014 |  |  |  |  |  | 125,197
Balance, end of period at Sep. 30, 2014 |  | $ 50,000 | $ 10,493,142 | $ 213,889 | $ (164,806) |

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