Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income
Lease income, net	$ 220,653	$ 236,560	$ 246,242
Income	226,490	242,674	251,809
Operating expenses
Depreciation and amortization	97,429	100,593	95,345
Property operating expenses	31,944	34,822	35,656
Real estate taxes	34,232	35,205	35,566
General and administrative expenses	35,361	35,267	42,661
Total expenses	198,966	205,887	209,228
Interest, dividend and other income	2,486	2,494	3,941
Gain on sale and transfer of investment properties, net	(22,717)	(24,943)	(30,155)
(Loss) gain on extinguishment of debt, net	(2,901)	9,103	840
Provision for asset impairment	(2,359)	(3,510)	(27,754)
Interest expense, net	62,011	95,097	24,066
Equity in earnings (losses) and (impairment), net, of unconsolidated entities	957	(31,393)	(804)
Realized and unrealized gains on marketable securities, net	0	244	46,563
Other income (expense)	37,477	47,092	16,697
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	65,001	83,879	59,278
Income before income taxes	(1,102)	(30)	(1,324)
Net income from continuing operations	63,899	83,849	57,954
Net (loss) income from discontinued operations	(25,500)	0	3,839
Net income	$ 38,399	$ 83,849	$ 61,793
Weighted average number of common shares outstanding, basic	728,620,309	761,139,011	773,445,341
Weighted average number of common shares outstanding, diluted	729,384,149	762,065,474	774,600,479
Net income, per common share, from continuing operations, basic and diluted (in dollars per share)	$ 0.09	$ 0.11	$ 0.07
Net income, per common share, from discontinued operations, basic and diluted (in dollars per share)	(0.04)	0	0
Net income per common share, basic and diluted (in dollars per share)	0.05	0.11	0.07
Distributions declared per common share outstanding (in dollars per share)	0.07	0.07	0.07
Distributions paid per common share outstanding (in dollars per share)	$ 0.07	$ 0.07	$ 0.07
Comprehensive income
Net income	$ 38,399	$ 83,849	$ 61,793
Unrealized loss on marketable securities	0	0	(11,734)
Unrealized gain on derivatives	816	923
Unrealized gain on derivatives			1,183
Reclassification for amounts recognized in net income	(1,396)	(956)	(46,563)
Comprehensive income	37,819	83,816	4,679
Other property income
Income
Income	1,981	1,724	1,345
Other fee income
Income
Income	$ 3,856	$ 4,390	$ 4,222