CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue:
Rental and other income	$ 411,134		$ 375,294		$ 808,131		$ 674,379
Management, development and other fees	2,672		2,913		5,750		5,185
Total revenue	413,806		378,207		813,881		679,564
Expenses:
Operating expenses, excluding property taxes	101,059		87,865		199,601		159,692
Property taxes	42,439		41,011		86,924		72,912
Interest expense, net	43,722	[1]	43,169	[1]	86,255	[1]	81,342	[1]
Loss on extinguishment of debt, net	412		0		412		0
Depreciation expense	110,395	[1]	189,977	[1]	216,762	[1]	295,536	[1]
General and administrative expense	10,220		11,345		19,456		21,384
Expensed acquisition, development and other pursuit costs	2,017		3,806		2,732		43,865
Total expenses	310,264		377,173		612,142		674,731
Equity in income (loss) of unconsolidated real estate entities	7,710		(940)		12,933		(19,503)
Gain on sale of land	0		240		0		240
Gain on sale of communities	60,945		0		60,945		0
Income (loss) from continuing operations	172,197		334		275,617		(14,430)
Discontinued operations:
Income from discontinued operations	0		2,081		310		7,827
Gain on sale of discontinued operations	0		33,682		37,869		118,173
Total discontinued operations	0		35,763		38,179		126,000
Net income	172,197		36,097		313,796		111,570
Net (income) loss attributable to noncontrolling interests	(14,111)		121		(13,971)		78
Net income attributable to common stockholders	158,086		36,218		299,825		111,648
Other comprehensive income:
Cash flow hedge losses reclassified to earnings	1,438		1,574		3,011		2,965
Comprehensive income	$ 159,524		$ 37,792		$ 302,836		$ 114,613
Earnings per common share - basic:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 1.22		$ 0.00		$ 2.02		$ (0.11)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.00		$ 0.28		$ 0.29		$ 1.01
Net income attributable to common stockholders (in dollars per share)	$ 1.22		$ 0.28		$ 2.31		$ 0.90
Earnings per common share - diluted:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 1.21		$ 0.00		$ 2.02		$ (0.11)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.00		$ 0.28		$ 0.29		$ 1.00
Net income attributable to common stockholders (in dollars per share)	$ 1.21		$ 0.28		$ 2.31		$ 0.89
Dividends per common share: (in dollars per share)	$ 1.16		$ 1.07		$ 2.32		$ 2.14

[1] Includes amounts associated with assets sold or held for sale, not classified as discontinued operations.