v2.4.0.6

Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting |  |  |  |
Percentage of physical occupancy |  | 95.00% |  |
Anniversary of completion of development or redevelopment |  | 1 year |  |
Net income |  | $ 423,562 | $ 441,370 | $ 174,079
Indirect operating expenses, net of corporate income |  | 31,911 | 30,550 | 30,246
Investments and investment management expense |  | 6,071 | 5,126 | 3,824
Expensed acquisition, development and other pursuit costs |  | 11,350 | 2,967 | 2,741
Interest expense, net |  | 136,920 | 167,814 | 169,997
(Gain) loss on extinguishment of debt, net |  | 1,179 | 1,940 |
General and administrative expense |  | 34,101 | 29,371 | 26,846
Equity in income of unconsolidated entities |  | (20,914) | (5,120) | (762)
Depreciation expense |  | 256,026 | 239,060 | 220,563
Casualty and impairment loss | 1,449 | 1,449 | 14,052 |
Gain on sale of real estate assets |  | (146,591) | (294,806) | (74,074)
Income from discontinued operations |  | (12,495) | (7,880) | (7,950)
Gain on acquisition of unconsolidated real estate entity |  | (14,194) |  |
Net operating income |  | $ 708,375 | $ 624,444 | $ 545,510

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- Definition Represents the attainment percentage of physical occupancy to consider a community as stabilized occupancy. + References No definition available. + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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