Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenues:
Rental income	$ 296,834		$ 249,995
Resident fees and services	327,324		158,174
Interest income	9,057		8,141
Other income	700		1,686
Total revenues	633,915		417,996
Expenses:
Interest expense	110,289		88,814
Property operating expenses	253,354		128,801
Depreciation and amortization	187,099		120,907
General and administrative	27,179		27,751
Transaction costs	65,980		5,579
Loss (gain) on derivatives, net	2,309		555
Loss (gain) on extinguishment of debt, net	(308)		0
Provision for loan losses	0		0
Total expenses	645,902		372,407
Income (loss) from continuing operations before income taxes and income from unconsolidated entities	(11,987)		45,589
Income tax (expense) benefit	(2,763)		(1,470)
Income from unconsolidated entities	2,262		1,532
Income (loss) from continuing operations	(12,488)		45,651
Discontinued operations:
Gain (loss) on sales of properties, net	82,492		769
Impairment of assets	0		0
Income (loss) from discontinued operations, net	1,795		11,038
Discontinued operations, net	84,287		11,807
Net income	71,799		57,458
Less: Preferred stock dividends	16,602		19,207
Less: Preferred stock redemption charge	0		0
Less: Net income (loss) attributable to noncontrolling interests	139	[1]	(1,056)	[1]
Net income (loss) attributable to common stockholders	55,058		39,307
Average number of common shares outstanding:
Basic	260,036		199,661
Diluted	260,036		201,658
Basic:
Income (loss ) from continuing operations attributable to common stockholders	$ (0.11)		$ 0.14
Discontinued operations, net	$ 0.32		$ 0.06
Net income (loss) attributable to common stockholders	$ 0.21	[2]	$ 0.20	[2]
Diluted:
Income (loss) from continuing operations attributable to common stockholders	$ (0.11)		$ 0.14
Discontinued operations, net	$ 0.32		$ 0.06
Net income (loss) attributable to common stockholders	$ 0.21	[2]	$ 0.19	[2]
Dividends declared and paid per common share	$ 0.765		$ 0.740
Total comprehensive income (loss)	$ 49,736		$ 57,744

[1] Includes amounts attributable to redeemable noncontrolling interests.

[2] Amounts may not sum due to rounding