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 Preferred Stock	Series C Preferred Stock Preferred Stock	Series D Preferred Stock Preferred Stock
Beginning balance at Dec. 31, 2020	$ 126,940	$ 4,684	$ 1,846,630	$ (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
Other distributions to noncontrolling interest, net	40					40
Ending balance at Dec. 31, 2021	7,047	5,347	1,851,866	(8,830)	(1,832,375)	(9,115)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(150,566)				(148,318)	(2,248)
Other comprehensive income	12,265			12,112		153
Shares issued upon redemption of Operating Partnership units	1		1
Shares issued under employee compensation plan, net of shares retired	4,235	9	4,226
Amortization of deferred compensation	2,557		2,557
Proceeds from disgorgement of shareholder's short-swing profits	25		25
Ending balance at Dec. 31, 2022	$ (124,436)	$ 5,356	$ 1,858,675	$ 3,282	$ (1,980,693)	$ (11,210)	$ 35	$ 69	$ 50