Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Series A Cumulative Preferred Stock [Member]	Common Stock	Additional Paid-in-Capital	Retained Earnings (Distributions in excess of net earnings)	Accumulated Other Comprehensive Income	Operating Partnership	Consolidated Joint Venture
Balance (in shares) at Dec. 31, 2021		12,879,475	166,503,062
Balance at Dec. 31, 2021	$ 2,413,867	$ 366,936	$ 1,665	$ 3,092,883	$ (1,046,739)	$ (17,113)	$ 6,316	$ 9,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	(15,247)
Net income (loss)	(15,469)				(15,247)		(104)	(118)
Unrealized gain (loss) on interest rate derivatives	34,193					34,193
Reclassification of unrealized gains on discontinued cash flow hedges to other income, net	(5,866)					(5,866)
Contributions from consolidated joint venture partners	156							156
Share grants to trustees	0		$ 4	(4)
Share grants to trustees (in shares)			432,779
Distribution to consolidated joint venture partners	(2,589)							(2,589)
Amortization of share-based compensation	5,555			5,555
Shares acquired to satisfy minimum required federal and state tax withholding on vesting restricted stock (in shares)			(87,626)
Shares acquired to satisfy minimum required federal and state tax withholding on vesting restricted stock	(1,269)		$ (1)	(1,268)
Forfeiture of restricted stock (in shares)			(4,629)
Restricted Stock Award, Forfeitures	0
Dividends, Preferred Stock	(6,279)				(6,279)
Distributions on common shares and units	(1,507)				(1,504)		(3)
Balance (in shares) at Mar. 31, 2022		12,879,475	166,843,586
Balance at Mar. 31, 2022	2,420,792	$ 366,936	$ 1,668	3,097,166	(1,069,769)	11,214	6,209	7,368
Balance (in shares) at Dec. 31, 2022		12,879,475	162,003,533
Balance at Dec. 31, 2022	2,428,646	$ 366,936	$ 1,620	3,054,958	(1,049,441)	40,591	6,313	7,669
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	10,645				10,645
Net income (loss)	10,514				10,645		17	(148)
Unrealized gain (loss) on interest rate derivatives	(6,416)					(6,416)
Reclassification of unrealized gains on discontinued cash flow hedges to other income, net	0
Issuance of restricted stock (in shares)			640,407
Issuance of restricted stock	0		$ 6	(6)
Amortization of share-based compensation	6,131			6,131
Shares acquired to satisfy minimum required federal and state tax withholding on vesting restricted stock (in shares)			(162,749)
Shares acquired to satisfy minimum required federal and state tax withholding on vesting restricted stock	(1,889)		$ (1)	(1,888)
Shares acquired as part of a share repurchase program	(24,537)		$ (24)	(24,513)
Shares acquired as part of a share repurchase program (in shares)			(2,401,853)
Forfeiture of restricted stock (in shares)			(1,554)
Restricted Stock Award, Forfeitures	0
Dividends, Preferred Stock	(6,279)				(6,279)
Distributions on common shares and units	(12,930)				(12,864)		(66)
Balance (in shares) at Mar. 31, 2023		12,879,475	160,077,784
Balance at Mar. 31, 2023	$ 2,393,240	$ 366,936	$ 1,601	$ 3,034,682	$ (1,057,939)	$ 34,175	$ 6,264	$ 7,521