Condensed Consolidated Statements of Operations and Other Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Rental income	$ 92,646	$ 106,017	$ 187,101	$ 215,991
Tenant recovery income	25,183	29,524	53,273	60,310
Other property income	1,335	1,798	3,632	4,731
Total revenues	119,164	137,339	244,006	281,032
Expenses
Operating expenses	19,384	21,004	39,639	42,868
Real estate taxes	17,701	21,487	38,169	43,366
Depreciation and amortization	43,710	52,325	88,938	105,799
Provision for impairment of investment properties	724	13,034	1,316	13,034
General and administrative expenses	10,274	10,370	22,769	21,583
Total expenses	91,793	118,220	190,831	226,650
Operating income	27,371	19,119	53,175	54,382
Interest expense	(16,817)	(21,435)	(35,582)	(106,967)
Other income, net	328	451	550	456
Income (loss) from continuing operations	10,882	(1,865)	18,143	(52,129)
Gain on sales of investment properties	0	116,628	34,519	157,792
Net income	10,882	114,763	52,662	105,663
Preferred stock dividends	0	(2,363)	0	(4,725)
Net income attributable to common shareholders	$ 10,882	$ 112,400	$ 52,662	$ 100,938
Earnings per common share – basic and diluted
Net income per common share attributable to common shareholders	$ 0.05	$ 0.48	$ 0.24	$ 0.43
Net income	$ 10,882	$ 114,763	$ 52,662	$ 105,663
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments (Note 9)	859	(145)	3,613	487
Comprehensive income attributable to the Company	$ 11,741	$ 114,618	$ 56,275	$ 106,150
Weighted average number of common shares outstanding – basic	218,982	234,243	218,915	235,269
Weighted average number of common shares outstanding – diluted	219,410	234,818	219,406	235,842