Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues
Revenues from rental properties	$ 289,391	$ 293,091
Management and other fee income	4,197	4,111
Total revenues	293,588	297,202
Operating expenses
Rent	2,783	2,818
Real estate taxes	38,269	34,472
Operating and maintenance	34,230	34,553
General and administrative	30,574	31,929
Provision for doubtful accounts	1,404	3,475
Impairment charges	1,617	5,840
Depreciation and amortization	92,074	84,856
Total operating expenses	200,951	197,943
Operating income	92,637	99,259
Other income/(expense)
Other income/(expense), net	1,273	(170)
Interest expense	(46,482)	(52,451)
Income from continuing operations before income taxes, net, equity in income of joint ventures, net, gain on change in control of interests and equity in income from other real estate investments, net	47,428	46,638
Benefit/(provision) for income taxes, net	493	(12,112)
Equity in income of joint ventures, net	14,733	69,933
Gain on change in control of interests	10,188
Income from continuing operations	76,529	115,258
Gain on sale of operating properties, net of tax	1,686	26,896
Net income	78,215	142,154
Net income attributable to noncontrolling interests	(1,482)	(1,441)
Net income attributable to the Company	76,733	140,713
Preferred stock dividends	(11,555)	(11,555)
Net income available to the Company's common shareholders	$ 65,178	$ 129,158
Net income available to the Company:
-Basic (in dollars per share)	$ 0.15	$ 0.31
-Diluted (in dollars per share)	$ 0.15	$ 0.31
Weighted average shares:
-Basic (in shares)	423,381	412,630
-Diluted (in shares)	424,146	414,145
Joint Ventures [Member]
Other income/(expense)
Equity in income of joint ventures, net	$ 14,733	$ 69,933
Other Real Estate Investments [Member]
Other income/(expense)
Equity in income of joint ventures, net	3,687	10,799
Continuing Operations [Member]
Operating expenses
Impairment charges	$ 1,617	$ 5,840