CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Shares of Beneficial Interest, $1.00 Par	Capital Contributed in Excess of Par	Accumulated Other Comprehensive Loss	Distributions in Excess of Net Income	Non- controlling interest	Series B Preferred Stock Preferred Shares $.01 par	Series C Preferred Stock Preferred Shares $.01 par	Series D Preferred Stock Preferred Shares $.01 par
Beginning 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	(32,973)				(32,469)	(504)
Other comprehensive (loss) income	5,807			5,734		73
Shares issued under employee compensation plans, net of shares retired	4,449	28	4,421
Amortization of deferred compensation	814		814
Ending balance at Mar. 31, 2022	(14,856)	5,375	1,857,101	(3,096)	(1,864,844)	(9,546)	35	69	50
Beginning 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	(115,331)
Ending balance at Sep. 30, 2022	(89,723)	5,369	1,858,124	3,297	(1,945,988)	(10,679)	35	69	50
Beginning balance at Mar. 31, 2022	(14,856)	5,375	1,857,101	(3,096)	(1,864,844)	(9,546)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(11,015)				(10,790)	(225)
Other comprehensive (loss) income	3,617			3,571		46
Shares issued under employee compensation plans, net of shares retired	(175)	(6)	(169)
Amortization of deferred compensation	564		564
Ending balance at Jun. 30, 2022	(21,865)	5,369	1,857,496	475	(1,875,634)	(9,725)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(71,343)				(70,354)	(989)
Other comprehensive (loss) income	2,857			2,822		35
Proceeds from disgorgement of shareholder's short-swing profits	25		25
Amortization of deferred compensation	603		603
Ending balance at Sep. 30, 2022	(89,723)	5,369	1,858,124	3,297	(1,945,988)	(10,679)	35	69	50
Beginning balance at Dec. 31, 2022	(124,436)	5,356	1,858,675	3,282	(1,980,693)	(11,210)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(45,745)				(45,086)	(659)
Other comprehensive (loss) income	(1,891)			(1,867)		(24)
Shares issued under employee compensation plans, net of shares retired	(52)	(15)	(37)
Amortization of deferred compensation	213		213
Ending balance at Mar. 31, 2023	(171,911)	5,341	1,858,851	1,415	(2,025,779)	(11,893)	35	69	50
Beginning balance at Dec. 31, 2022	(124,436)	5,356	1,858,675	3,282	(1,980,693)	(11,210)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(149,208)
Ending balance at Sep. 30, 2023	(276,090)	5,341	1,858,976	584	(2,127,774)	(13,371)	35	69	50
Beginning balance at Mar. 31, 2023	(171,911)	5,341	1,858,851	1,415	(2,025,779)	(11,893)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(45,605)				(44,951)	(654)
Other comprehensive (loss) income	(510)			(504)		(6)
Amortization of deferred compensation	61		61
Ending balance at Jun. 30, 2023	(217,965)	5,341	1,858,912	911	(2,070,730)	(12,553)	35	69	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(57,858)				(57,044)	(814)
Other comprehensive (loss) income	(331)			(327)		(4)
Amortization of deferred compensation	64		64
Ending balance at Sep. 30, 2023	$ (276,090)	$ 5,341	$ 1,858,976	$ 584	$ (2,127,774)	$ (13,371)	$ 35	$ 69	$ 50