Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenues		$ 290,634	$ 299,717
Revenues		295,010	304,078
Operating expenses
Rent		(2,692)	(2,818)
Real estate taxes		(39,347)	(40,434)
Operating and maintenance		(40,896)	(43,331)
General and administrative		(25,831)	(22,398)
Provision for doubtful accounts			(2,131)
Impairment charges		4,175	7,646
Depreciation and amortization		(71,561)	(81,382)
Total operating expenses		(184,502)	(200,140)
Gain on sale of properties/change in control of interests		23,595	56,971
Operating income		134,103	160,909
Other income/(expense)
Other income, net		2,622	6,179
Interest expense		(44,395)	(49,943)
Income before income taxes, net, equity in income of joint ventures, net, and equity in income from other real estate investments, net		92,330	117,145
Provision for income taxes, net		(630)	(52)
Net income		116,678	143,982
Net (income)/loss attributable to noncontrolling interests		(509)	108
Net income attributable to the Company		116,169	144,090
Preferred dividends		(14,534)	(14,589)
Net income available to the Company's common shareholders		$ 101,635	$ 129,501
Per common share:
-Basic (in dollars per share)		$ 0.24	$ 0.30
-Diluted (in dollars per share)		$ 0.24	$ 0.30
Weighted average shares:
-Basic (in shares)		419,464	423,404
-Diluted (in shares)	[1]	420,763	424,521
Joint Ventures [Member]
Other income/(expense)
Equity in income		$ 18,754	$ 16,913
Other Real Estate Investments [Member]
Other income/(expense)
Equity in income		6,224	9,976
Management and Other Fee Incomes [Member]
Revenues
Revenues		$ 4,376	$ 4,361

[1] The effect of the assumed conversion of certain convertible units had an anti-dilutive effect upon the calculation of Net income available to the Company’s common shareholders per share. Accordingly, the impact of such conversions has not been included in the determination of diluted earnings per share calculations. Additionally, there were 1.3 million and 3.3 million stock options that were not dilutive as of March 31, 2019 and 2018, respectively.