Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues
Revenues from rental properties, net		$ 278,871	$ 286,004
Management and other fee income		3,437	3,740
Total revenues		282,308	289,744
Operating expenses
Rent		(3,035)	(2,835)
Real estate taxes		(38,936)	(39,652)
Operating and maintenance		(46,520)	(42,408)
General and administrative		(24,478)	(21,017)
Impairment charges		(0)	2,974
Depreciation and amortization		(74,876)	(69,397)
Total operating expenses		(187,845)	(178,283)
Gain on sale of properties		10,005	3,847
Operating income		104,468	115,308
Other income/(expense)
Other income, net		3,357	1,245
Gain/(loss) on marketable securities, net		61,085	(4,667)
Interest expense		(47,716)	(46,060)
Income before income taxes, net, equity in income of joint ventures, net, and equity in income from other real estate investments, net		121,194	65,826
Provision for income taxes, net		(1,308)	(43)
Net income		141,425	90,389
Net income attributable to noncontrolling interests		(3,483)	(289)
Net income attributable to the Company		137,942	90,100
Preferred dividends		(6,354)	(6,354)
Net income available to the Company's common shareholders		$ 131,588	$ 83,746
Per common share:
-Basic (in dollars per share)		$ 0.30	$ 0.19
-Diluted (in dollars per share)		$ 0.30	$ 0.19
Weighted average shares:
-Basic (in shares)		430,524	429,735
-Diluted (in shares)	[1]	432,264	430,505
Joint Ventures [Member]
Other income/(expense)
Equity in income		$ 17,752	$ 13,648
Other Real Estate Investments [Member]
Other income/(expense)
Equity in income		$ 3,787	$ 10,958

[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 0.8 million and 1.2 million stock options that were not dilutive as of March 31, 2021 and 2020, respectively.