CONSOLIDATED STATEMENT OF EQUITY - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Preferred Shares	Common Shares	Additional Paid-in Capital	Accumulated Distributions in Excess of Net Income	Deferred Compensation Obligation	Accumulated Other Comprehensive Loss	Treasury Stock at Cost	Non-Controlling Interests
Beginning Balance at Dec. 31, 2017	$ 2,897,438	$ 525,000	$ 36,851	$ 5,513,197	$ (3,183,134)	$ 8,777	$ (1,106)	$ (8,653)	$ 6,506
Issuance of common shares related to stock plans	5,865	0	83	5,782	0	0	0	0	0
Stock-based compensation, net	2,785	0	0	3,015	0	(1,109)	0	879	0
Distributions to non-controlling interests	(193)	0	0	0	0	0	0	0	(193)
Redemption of OP Units	(709)	0	0	880	0	0	0	0	(1,589)
Dividends declared-common shares	(70,304)	0	0	0	(70,304)	0	0	0	0
Dividends declared-preferred shares	(8,383)	0	0	0	(8,383)	0	0	0	0
Comprehensive (loss) income	(54,176)	0	0	0	(54,153)	0	(205)	0	182
Ending Balance at Mar. 31, 2018	$ 2,772,323	$ 525,000	$ 36,934	$ 5,522,874	$ (3,315,974)	$ 7,668	$ (1,311)	$ (7,774)	$ 4,906