CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Shares of Beneficial Interest, $1.00 Par	Capital Contributed in Excess of Par	Accumulated Other Comprehensive Income (Loss)	Distributions in Excess of Net Income	Non- controlling interest	Series B Preferred Stock	Series B Preferred Stock Preferred Stock	Series B Preferred Stock Distributions in Excess of Net Income	Series C Preferred Stock	Series C Preferred Stock Preferred Stock	Series C Preferred Stock Distributions in Excess of Net Income	Series D Preferred Stock	Series D Preferred Stock Preferred Stock	Series D Preferred Stock Distributions in Excess of Net Income
Beginning balance at Dec. 31, 2019	$ 427,425	$ 77,550	$ 1,766,883	$ 12,556	$ (1,408,352)	$ 3,746		$ 35			$ 69			$ 50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(266,706)				(259,517)	(7,189)
Other comprehensive income	(8,359)			(8,064)		(295)
Shares issued upon redemption of Operating Partnership units	(28)					(28)
Shares issued under employee compensation plan, net of shares retired	133	1,987	(1,854)
Amortization of deferred compensation	6,748		6,748
Dividends paid to preferred shareholders							$ (3,182)		$ (3,182)	$ (6,210)		$ (6,210)	$ (4,296)		$ (4,296)
Dividends paid to common shareholders ($0.84 per share)	(18,081)				(18,081)
Noncontrolling interests:
Distributions paid to Operating Partnership unit holders ($0.84 per unit)	(504)					(504)
Ending balance at Dec. 31, 2020	126,940	79,537	1,771,777	(20,620)	(1,699,638)	(4,270)		35			69			50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(135,867)				(132,737)	(3,130)
Other comprehensive income	12,010			11,790		220
Shares issued upon redemption of Operating Partnership units		940	1,035			(1,975)
Shares issued under employee compensation plan, net of shares retired	(647)	(277)	(370)
Amortization of deferred compensation	4,571		4,571
Noncontrolling interests:
Other distributions to noncontrolling interest, net	40					40
Ending balance at Dec. 31, 2021	$ 7,047	$ 80,200	$ 1,777,013	$ (8,830)	$ (1,832,375)	$ (9,115)		$ 35			$ 69			$ 50