CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue:
Rental and other income	$ 396,998	$ 299,085
Management, development and other fees	3,077	2,272
Total revenue	400,075	301,357
Expenses:
Operating expenses, excluding property taxes	98,542	71,828
Property taxes	44,485	31,902
Interest expense, net	42,533	38,174
Depreciation expense	106,367	105,559
General and administrative expense	9,236	10,039
Expensed acquisition, development and other pursuit costs	715	40,059
Total expenses	301,878	297,561
Equity in income (loss) of unconsolidated entities	5,223	(18,564)
Income (loss) from continuing operations	103,420	(14,768)
Discontinued operations:
Income from discontinued operations	310	5,746
Gain on sale of communities	37,869	84,491
Total discontinued operations	38,179	90,237
Net income	141,599	75,469
Net loss (gain) attributable to noncontrolling interests	140	(42)
Net income attributable to common stockholders	141,739	75,427
Other comprehensive income:
Cash flow hedge losses reclassified to earnings	1,573	1,391
Comprehensive income	$ 143,312	$ 76,818
Earnings per common share - basic:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 0.80	$ (0.12)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.29	$ 0.75
Net income attributable to common stockholders (in dollars per share)	$ 1.09	$ 0.63
Earnings per common share - diluted:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 0.80	$ (0.12)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.29	$ 0.75
Net income attributable to common stockholders (in dollars per share)	$ 1.09	$ 0.63
Dividends per common share: (in dollars per share)	$ 1.16	$ 1.07