Consolidated Statements of Income (Unaudited) (USD $) Share data in Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Revenues:
Rental income	$ 249,994,000		$ 144,924,000		$ 656,843,000		$ 419,685,000
Resident fees and services	125,125,000		12,809,000		319,559,000		12,809,000
Interest income	7,858,000		10,054,000		32,433,000		28,437,000
Other income	1,809,000		1,156,000		9,974,000		4,802,000
Total revenues	384,786,000		168,943,000		1,018,809,000		465,733,000
Expenses:
Interest expense	87,795,000		42,935,000		230,143,000		106,338,000
Property operating expenses	103,855,000		20,327,000		267,981,000		44,089,000
Depreciation and amortization	115,640,000		48,963,000		298,826,000		133,004,000
Transaction costs	6,739,000		21,235,000		56,542,000		29,701,000
General and administrative	19,735,000		11,628,000		57,009,000		40,331,000
Loss (gain) on extinguishment of debt			9,099,000		0		34,171,000
Provision for loan losses	132,000		28,918,000		547,000		28,918,000
Total expenses	333,896,000		183,105,000		911,048,000		416,552,000
Income (loss) from continuing operations before income taxes and income from unconsolidated joint ventures	50,890,000		(14,162,000)		107,761,000		49,181,000
Income tax (expense) benefit	(223,000)		(52,000)		(563,000)		(325,000)
Income from unconsolidated joint ventures	1,642,000		1,899,000		4,156,000		4,496,000
Income (loss) from continuing operations	52,309,000		(12,315,000)		111,354,000		53,352,000
Discontinued operations:
Gain (loss) on sales of properties	185,000		10,526,000		56,565,000		20,559,000
Impairment of assets			(947,000)		(202,000)		(947,000)
Income (loss) from discontinued operations, net	(141,000)		2,830,000		2,656,000		9,886,000
Discontinued operations, net	44,000		12,409,000		59,019,000		29,498,000
Net income	52,353,000		94,000		170,373,000		82,850,000
Less: Preferred stock dividends	17,234,000		5,347,000		43,268,000		16,340,000
Less: Net income (loss) attributable to noncontrolling interests	(1,488,000)	[1]	(690,000)	[1]	(2,721,000)	[1]	(383,000)	[1]
Net income (loss) attributable to common stockholders	$ 36,607,000		$ (4,563,000)		$ 129,826,000		$ 66,893,000
Average number of common shares outstanding:
Basic	177,272		125,298		169,636		124,132
Diluted	177,849		125,298		170,301		124,660
Basic:
Income (loss ) from continuing operations attributable to common stockholders	$ 0.21		$ (0.14)		$ 0.42		$ 0.30
Discontinued operations, net	$ 0.00		$ 0.10		$ 0.35		$ 0.24
Net income (loss) attributable to common stockholders	$ 0.21	[2]	$ (0.04)	[2]	$ 0.77	[2]	$ 0.54	[2]
Diluted:
Income (loss) from continuing operations attributable to common stockholders	$ 0.21		$ (0.14)		$ 0.42		$ 0.30
Discontinued operations, net	$ 0.00		$ 0.10		$ 0.35		$ 0.24
Net income (loss) attributable to common stockholders	$ 0.21	[2]	$ (0.04)	[2]	$ 0.76	[2]	$ 0.54	[2]
Dividends declared and paid per common share	$ 0.715		$ 0.69		$ 2.12		$ 2.05

[1] Includes amounts attributable to redeemable noncontrolling interests.

[2] Amounts may not sum due to rounding