Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Revenues from rental properties, net	$ 280,710	$ 289,383	$ 571,344	$ 589,100
Management and other fee income	4,163	4,020	8,539	8,381
Revenues	284,873	293,403	579,883	597,481
Operating expenses
Rent	(2,924)	(2,742)	(5,616)	(5,560)
Real estate taxes	(37,005)	(37,274)	(76,352)	(77,708)
Operating and maintenance	(43,217)	(41,325)	(84,113)	(84,656)
General and administrative	(22,633)	(24,029)	(48,464)	(46,427)
Provision for doubtful accounts	0	(1,051)	0	(3,182)
Impairment charges	17,451	22,873	21,626	30,519
Depreciation and amortization	(69,005)	(79,760)	(140,566)	(161,142)
Total operating expenses	(192,235)	(209,054)	(376,737)	(409,194)
Gain on sale of properties/change in control of interests	14,762	95,240	38,357	152,211
Operating income	107,400	179,589	241,503	340,498
Other income/(expense)
Other income, net	1,938	3,277	4,560	9,456
Interest expense	(44,097)	(46,434)	(88,492)	(96,377)
Income before income taxes, net, equity in income of joint ventures, net, and equity in income from other real estate investments, net	65,241	136,432	157,571	253,577
Benefit/(provision) for income taxes, net	344	720	(286)	668
Net income	101,387	165,809	218,065	309,791
Net income attributable to noncontrolling interests	(360)	(423)	(869)	(315)
Net income attributable to the Company	101,027	165,386	217,196	309,476
Preferred dividends	(14,534)	(14,534)	(29,068)	(29,123)
Net income available to the Company's common shareholders	$ 86,493	$ 150,852	$ 188,128	$ 280,353
Per common share:
-Basic (in dollars per share)	$ 0.20	$ 0.36	$ 0.45	$ 0.66
-Diluted (in dollars per share)	$ 0.20	$ 0.36	$ 0.44	$ 0.66
Weighted average shares:
-Basic (in shares)	419,697	420,731	419,581	422,060
-Diluted (in shares)	420,646	421,928	420,798	423,236
Joint Ventures [Member]
Other income/(expense)
Equity in income	$ 22,533	$ 19,040	$ 41,287	$ 35,953
Other Real Estate Investments [Member]
Other income/(expense)
Equity in income	$ 13,269	$ 9,617	$ 19,493	$ 19,593