Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Loss - Summary of Change in Noncontrolling Interest (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		$ 489,364
Cancellation of OP units				$ (568)
Employee and trustee stock compensation, net		12,753	$ 11,122	12,430
Noncontrolling interest distributions		(80,186)	(79,838)	(27,051)
Noncontrolling interest contributions		59,612	109,428	30,164
Net (loss) income		(1,749)	(65,251)	26,030
Other comprehensive (loss) income - unrealized gain on valuation of swap agreements		10,963	96,858	30,500
Reclassification of realized interest on swap agreements		33,647	(8,232)	(21,407)
Reclassification of redeemable noncontrolling interests			(76,569)
Ending Balance		446,300	489,364
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		489,364	628,322	609,165
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership		(2,521)	(3,945)	(1,431)
Cancellation of OP units	[1]			(568)
Distributions declared per Common OP Unit		(5,352)	(5,094)	(4,185)
Acquisition of noncontrolling interest asset	[2]		(91,811)
City Point Loan Advances		0	0
City Point Loan accrued interest		0	0
Employee and trustee stock compensation, net		11,064	10,000	11,284
Noncontrolling interest distributions		(80,186)	(79,838)	(27,051)
Noncontrolling interest contributions		59,612	109,428	30,164
Net (loss) income		(13,383)	(24,270)	2,482
Other comprehensive (loss) income - unrealized gain on valuation of swap agreements		5,402	20,208	5,990
Reclassification of realized interest on swap agreements		(13,711)	1,851	7,240
Reclassification of redeemable noncontrolling interests	[3]		(76,569)
Reallocation of noncontrolling interests	[4]	(3,989)	1,082	(4,768)
Ending Balance		446,300	489,364	628,322
Noncontrolling Interests | Noncontrolling Interests in Partially-Owned Affiliates
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	[5]	389,810	534,202	519,734
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	[5]	0	0	0
Cancellation of OP units	[1],[5]			0
Distributions declared per Common OP Unit	[5]	0	0	0
Acquisition of noncontrolling interest asset	[2],[5]		(91,811)
City Point Loan Advances	[5]	0	0
City Point Loan accrued interest	[5]	0	0
Employee and trustee stock compensation, net	[5]	0	0	0
Noncontrolling interest distributions	[5]	(80,186)	(79,838)	(27,051)
Noncontrolling interest contributions	[5]	59,612	109,428	30,164
Net (loss) income	[5]	(15,168)	(22,962)	407
Other comprehensive (loss) income - unrealized gain on valuation of swap agreements	[5]	6,015	15,567	3,918
Reclassification of realized interest on swap agreements	[5]	(13,501)	1,793	7,030
Reclassification of redeemable noncontrolling interests	[3],[5]		(76,569)
Reallocation of noncontrolling interests	[4],[5]	0	0	0
Ending Balance	[5]	346,582	389,810	534,202
Noncontrolling Interests | Operating Partnership, as General Partner or Managing Member
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	[6]	99,554	94,120	89,431
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	[6]	(2,521)	(3,945)	(1,431)
Cancellation of OP units	[1],[6]			(568)
Distributions declared per Common OP Unit	[6]	(5,352)	(5,094)	(4,185)
Acquisition of noncontrolling interest asset	[2],[6]		0
City Point Loan Advances	[6]	0	0
City Point Loan accrued interest	[6]	0	0
Employee and trustee stock compensation, net	[6]	11,064	10,000	11,284
Noncontrolling interest distributions	[6]	0	0	0
Noncontrolling interest contributions	[6]	0	0	0
Net (loss) income	[6]	1,785	(1,308)	2,075
Other comprehensive (loss) income - unrealized gain on valuation of swap agreements	[6]	(613)	4,641	2,072
Reclassification of realized interest on swap agreements	[6]	(210)	58	210
Reclassification of redeemable noncontrolling interests	[3],[6]		0
Reallocation of noncontrolling interests	[4],[6]	(3,989)	1,082	(4,768)
Ending Balance	[6]	99,718	99,554	94,120
Redeemable NonControlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	[7]	67,664	0	0
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	[7]	0	0	0
Cancellation of OP units	[1],[7]			0
Distributions declared per Common OP Unit	[7]	0	0	0
Acquisition of noncontrolling interest asset	[2],[7]		0
City Point Loan Advances	[7]	(796)	(65,391)
City Point Loan accrued interest	[7]	(9,350)	(3,923)
Employee and trustee stock compensation, net	[7]	0	0	0
Noncontrolling interest distributions	[7]	(50)	0	0
Noncontrolling interest contributions	[7]	1,110	65,945	0
Net (loss) income	[7]	8,239	(5,536)	0
Other comprehensive (loss) income - unrealized gain on valuation of swap agreements	[7]	0	0	0
Reclassification of realized interest on swap agreements	[7]	0	0	0
Reclassification of redeemable noncontrolling interests	[3]		76,569
Reallocation of noncontrolling interests	[4],[7]	0	0	0
Ending Balance	[7]	$ 50,339	$ 67,664	$ 0

[1] The Company exchanged 21,109 OP Units in settlement of a note receivable in the amount of $0.5 million on July 12, 2021.

[2] Represents the acquisition of the 11.67% noncontrolling interest in Fund II and Mervyns II acquired on June 27, 2022 for $18.5 million and of a 21.67% interest in Fund II on August 1, 2022 for $5.8 million (Note 1).

[3] Represents the reclassification of redeemable noncontrolling interests related to the City Point Loan in the third quarter of 2022

[4] Adjustment reflects the difference between the fair value of the consideration received or paid and the book value of the Common Shares, Common OP Units, Preferred OP Units, and LTIP Units involving changes in ownership.

[5] Noncontrolling interests in partially-owned affiliates comprise third-party interests in Funds II, III, IV and V, and Mervyns II, and seven other subsidiaries.

[6] Noncontrolling interests in the Operating Partnership are comprised of (i) the limited partners’ 2,855,574, 3,062,108, and 3,076,849 Common OP Units at December 31, 2023, 2022 and 2021, respectively; (ii) 188 Series A Preferred OP Units at December 31, 2023, 2022 and 2021; (iii) 126,384 Series C Preferred OP Units at December 31, 2023 and 2022, and 126,593 at December 31, 2021; and (iv) 4,247,054, 3,512,414, and 3,371,296 LTIP units at December 31, 2023, 2022 and 2021, respectively, as discussed in the Amended and Restated 2020 Plan (Note 13). Distributions declared for Preferred OP Units are reflected in net income (loss) in the table above.

[7] Redeemable noncontrolling interests comprise third-party interests that have been granted put rights, as further described below.