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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Reconciliation of NOI to net income |  |  |  |  |  |  |  |
Net income | $ 172,197 |  | $ 36,097 |  | $ 313,796 |  | $ 111,570 |
Indirect operating expenses, net of corporate income | 12,343 |  | 10,852 |  | 23,161 |  | 19,894 |
Investments and investment management expense | 1,137 |  | 1,096 |  | 2,116 |  | 2,110 |
Expensed acquisition, development and other pursuit costs | 2,017 |  | 3,806 |  | 2,732 |  | 43,865 |
Interest expense, net | 43,722 | [1] | 43,169 | [1] | 86,255 | [1] | 81,342 | [1]
Loss on extinguishment of debt, net | 412 |  | 0 |  | 412 |  | 0 |
General and administrative expense | 10,220 |  | 11,345 |  | 19,456 |  | 21,384 |
Equity in (income) loss of unconsolidated real estate entities | (7,710) |  | 940 |  | (12,933) |  | 19,503 |
Depreciation expense | 110,395 | [1] | 189,977 | [1] | 216,762 | [1] | 295,536 | [1]
Gain (Loss) on Sale of Properties |  |  |  |  | 98,814 |  | 118,413 |
Gain on sale of discontinued operations | 0 |  | (33,682) |  | (37,869) |  | (118,173) |
Income from discontinued operations | 0 |  | (2,081) |  | (310) |  | (7,827) |
Net operating income from real estate assets sold or held for sale, not classified as discontinued operations | (2,030) |  | (2,308) |  | (4,314) |  | (4,178) |
Net operating income | 281,758 |  | 258,971 |  | 548,319 |  | 464,786 |
Continuing Operations [Member] |  |  |  |  |  |  |  |
Reconciliation of NOI to net income |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Properties | 60,945 |  | 240 |  | 60,945 |  | 240 |
Net operating income | $ 281,758 | [2] | $ 258,971 |  | $ 548,319 | [2] | $ 464,786 |
[1] | Includes amounts associated with assets sold or held for sale, not classified as discontinued operations.
[2] | Results for the three months ended June 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 six months ended June 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.

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