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Segment Reporting (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | $ 430,525 |  | $ 389,189 |  | $ 1,244,407 |  | $ 1,068,752 |
NOI | 293,353 |  | 258,436 |  | 838,830 |  | 721,347 |
Gross real estate assets held for sale | 87,393 |  | 654,729 |  | 87,393 |  | 654,729 |
Established |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 336,451 | [1] | 208,842 |  | 726,503 | [1] | 617,163 |
NOI | 233,525 | [1] | 144,126 |  | 505,695 | [1] | 429,359 |
% NOI change from prior year | 5.50% | [1] | 4.20% |  | 3.00% | [1] | 5.40% |
Gross real estate | 7,575,596 | [1],[2] | 6,572,177 | [2] | 7,575,596 | [1],[2] | 6,572,177 | [2]
Established | New England |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 49,227 | [1] | 42,853 |  | 140,891 | [1] | 126,239 |
NOI | 31,858 | [1] | 27,221 |  | 89,693 | [1] | 81,882 |
% NOI change from prior year | 4.60% | [1] | (0.60%) |  | 0.70% | [1] | 2.10% |
Gross real estate | 1,427,605 | [1],[2] | 1,286,876 | [2] | 1,427,605 | [1],[2] | 1,286,876 | [2]
Established | Metro NY/NJ |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 96,112 | [1] | 63,103 |  | 237,732 | [1] | 186,897 |
NOI | 67,255 | [1] | 43,327 |  | 165,867 | [1] | 129,215 |
% NOI change from prior year | 3.90% | [1] | 3.40% |  | 2.40% | [1] | 4.60% |
Gross real estate | 2,376,493 | [1],[2] | 1,919,151 | [2] | 2,376,493 | [1],[2] | 1,919,151 | [2]
Established | Mid-Atlantic |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 47,122 | [1] | 25,262 |  | 73,964 | [1] | 75,608 |
NOI | 32,284 | [1] | 17,652 |  | 51,947 | [1] | 54,169 |
% NOI change from prior year | (2.20%) | [1] | (1.00%) |  | (3.30%) | [1] | 1.10% |
Gross real estate | 645,872 | [1],[2] | 632,102 | [2] | 645,872 | [1],[2] | 632,102 | [2]
Established | Pacific Northwest |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 16,744 | [1] | 11,773 |  | 40,437 | [1] | 34,752 |
NOI | 11,668 | [1] | 7,752 |  | 28,104 | [1] | 23,539 |
% NOI change from prior year | 9.40% | [1] | 1.70% |  | 6.30% | [1] | 7.40% |
Gross real estate | 499,611 | [1],[2] | 443,812 | [2] | 499,611 | [1],[2] | 443,812 | [2]
Established | Northern California |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 64,120 | [1] | 35,850 |  | 129,560 | [1] | 104,794 |
NOI | 48,805 | [1] | 28,009 |  | 99,030 | [1] | 79,914 |
% NOI change from prior year | 12.20% | [1] | 15.30% |  | 7.80% | [1] | 13.10% |
Gross real estate | 1,401,286 | [1],[2] | 1,232,724 | [2] | 1,401,286 | [1],[2] | 1,232,724 | [2]
Established | Southern California |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 63,126 | [1] | 30,001 |  | 103,919 | [1] | 88,873 |
NOI | 41,655 | [1] | 20,165 |  | 71,054 | [1] | 60,640 |
% NOI change from prior year | 6.80% | [1] | 4.70% |  | 4.50% | [1] | 5.70% |
Gross real estate | 1,224,729 | [1],[2] | 1,057,512 | [2] | 1,224,729 | [1],[2] | 1,057,512 | [2]
Other Stabilized |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 45,023 | [1] | 139,093 |  | 370,627 | [1] | 348,028 |
NOI | 31,838 | [1] | 92,856 |  | 255,085 | [1] | 237,846 |
Gross real estate | 6,008,289 | [1],[2] | 6,539,176 | [2] | 6,008,289 | [1],[2] | 6,539,176 | [2]
Development / Redevelopment |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 44,310 | [1] | 32,369 |  | 125,215 | [1] | 79,704 |
NOI | 27,990 | [1] | 21,454 |  | 78,050 | [1] | 54,142 |
Gross real estate | 3,639,770 | [1],[2] | 2,676,384 | [2] | 3,639,770 | [1],[2] | 2,676,384 | [2]
Land Held for Future Development |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Gross real estate | 176,484 | [1],[2] | 282,285 | [2] | 176,484 | [1],[2] | 282,285 | [2]
Non-allocated |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 2,503 | [1],[3] | 3,014 | [3] | 8,253 | [1],[3] | 8,198 | [3]
Gross real estate | 43,215 | [1],[2],[3] | 47,921 | [2],[3] | 43,215 | [1],[2],[3] | 47,921 | [2],[3]
Continuing Operations [Member] |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |
Total revenue | 428,287 | [1] | 383,318 |  | 1,230,598 | [1] | 1,053,093 |
NOI | 293,353 | [1] | 258,436 |  | 838,830 | [1] | 721,347 |
% NOI change from prior year | 13.50% | [1] | 49.30% |  | 16.30% | [1] | 45.40% |
Gross real estate | $ 17,443,354 | [1],[2] | $ 16,117,943 | [2] | $ 17,443,354 | [1],[2] | $ 16,117,943 | [2]
[1] | Results for the three months ended September 30, 2014 reflect the operating segments updated as of April 1, 2014, which include most stabilized communities acquired as part of the Archstone Acquisition in the Established Communities segment. Results for the nine months ended September 30, 2014 reflect the operating segments determined as of January 1, 2014, which include stabilized communities acquired as part of the Archstone Acquisition in the Other Stabilized segment.
[2] | Does not include gross real estate assets held for sale of $87,393 and $654,729 as of September 30, 2014 and 2013, respectively.
[3] | Revenue represents third party management, asset management and developer fees and miscellaneous income which are not allocated to a reportable segment.

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