v2.4.0.6

Organization and Basis of Presentation (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 state home community | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 property state home community | Dec. 31, 2011 | Dec. 31, 2010
Organization and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |
Number of operating apartment communities owned | 180 |  |  |  |  |  |  |  | 180 |  |
Number of apartment homes included in operating apartment communities owned | 52,792 |  |  |  |  |  |  |  | 52,792 |  |
Number of states where operating apartment communities owned are located | 9 |  |  |  |  |  |  |  | 9 |  |
Number of communities with apartments under reconstruction | 5 |  |  |  |  |  |  |  | 5 |  |
Number of apartment homes under reconstruction | 1,787 |  |  |  |  |  |  |  | 1,787 |  |
Number of owned communities under construction | 23 |  |  |  |  |  |  |  | 23 |  |
Expected number of apartment homes under construction | 6,599 |  |  |  |  |  |  |  | 6,599 |  |
Communities under development rights | 34 |  |  |  |  |  |  |  | 34 |  |
Estimated number of apartment homes in communities to be developed | 9,602 |  |  |  |  |  |  |  | 9,602 |  |
Period of lease |  |  |  |  |  |  |  |  | 1 year |  |
Number of land parcels acquired under development rights |  |  |  |  |  |  |  |  | 4 |  |
Number of land parcels acquired under development rights for which the Company is actively pursuing development |  |  |  |  |  |  |  |  | 3 |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of distribution of adjusted taxable income for deducting dividends from federally taxable income |  |  |  |  |  |  |  |  | 90.00% |  |
Minimum percentage of distribution of REIT taxable income for federal income tax exemption |  |  |  |  |  |  |  |  | 100.00% |  |
Refunds of federal excise taxes |  |  |  |  |  |  |  |  | $ 235,000 |  |
Reconciliation of net income attributable to common stockholders to taxable net income |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | 122,356,000 | 86,844,000 | 156,909,000 | 57,758,000 | 323,085,000 | 44,824,000 | 43,373,000 | 30,341,000 | 423,869,000 | 441,622,000 | 175,331,000
GAAP gain on sale of communities (in excess of) less than tax gain |  |  |  |  |  |  |  |  | 37,575,000 | (84,152,000) | 3,812,000
Depreciation/amortization timing differences on real estate |  |  |  |  |  |  |  |  | 15,012,000 | 9,192,000 | 8,266,000
Tax compensation expense less than (in excess of) GAAP |  |  |  |  |  |  |  |  | (19,218,000) | (43,145,000) | (12,202,000)
Impairment loss |  |  |  |  |  |  |  |  | 1,449,000 | 14,052,000 |
Other adjustments |  |  |  |  |  |  |  |  | (3,202,000) | 183,000 | 12,628,000
Taxable net income |  |  |  |  |  |  |  |  | 455,485,000 | 337,752,000 | 187,835,000
Tax components of common stock dividends declared |  |  |  |  |  |  |  |  |  |  |
Ordinary income (as a percent) |  |  |  |  |  |  |  |  | 47.00% | 34.00% | 74.00%
15% capital gain (as a percent) |  |  |  |  |  |  |  |  | 33.00% | 47.00% | 11.00%
Unrecaptured Section 1250 gain (as a percent) |  |  |  |  |  |  |  |  | 20.00% | 19.00% | 15.00%
Deferred Financing Costs |  |  |  |  |  |  |  |  |  |  |
Accumulated amortization of deferred financing costs | 20,773,000 |  |  |  | 17,574,000 |  |  |  | 20,773,000 | 17,574,000 |
Buildings and Building Improvements |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Capitalization of minimum improvements and upgrades | 15,000 |  |  |  |  |  |  |  | 15,000 |  |
Buildings and Building Improvements | Minimum |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of buildings and improvements |  |  |  |  |  |  |  |  | 7 years |  |
Buildings and Building Improvements | Maximum |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of buildings and improvements |  |  |  |  |  |  |  |  | 30 years |  |
Computers and furniture |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Capitalization of minimum improvements and upgrades | $ 2,500 |  |  |  |  |  |  |  | $ 2,500 |  |
Computers and furniture | Minimum |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of buildings and improvements |  |  |  |  |  |  |  |  | 3 years |  |
Computers and furniture | Maximum |  |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of buildings and improvements |  |  |  |  |  |  |  |  | 7 years |  |

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- Definition Represents the minimum percentage of adjusted taxable income to be distributed as a condition for deducting dividends paid from Federally taxable income as applicable to a corporate real estate investment trust. + References No definition available. + Details
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