Real Estate Activities - Dispositions (Details) $ in Thousands			1 Months Ended								12 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) Outparcels	Aug. 31, 2022 USD ($) Outparcels	Jun. 30, 2022 USD ($)	Feb. 28, 2022 USD ($)	May 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 31, 2022 USD ($)	Aug. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mortgage loans payable, net				$ 749,396							$ 749,396	$ 851,283
Cash proceeds from sales of real estate											89,744	5,008
(Loss) gain on sales of real estate, net											10,829	(1,180)
Impairment of Real Estate											44,101	9,938
Proceeds from redemption of preferred equity									$ 2,500
Gain on sale of preferred equity interest											3,688	0
Number of outparcels sold | Outparcels						3	2
Valley View Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mortgage loans payable, net													$ 27,200
Disposal group, consideration				2,600							2,600
Cash proceeds from sales of real estate				2,400
(Loss) gain on sales of real estate, net				$ 1,600
Monroe Marketplace
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration	$ 1,000
Impairment of Real Estate	$ 300											262
Valley View Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration														$ 3,500
Impairment of Real Estate		$ 1,300										$ 1,302
Moorestown Mall Parcel Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration										$ 10,100
Cash proceeds from sales of real estate										800
Lease termination fee										9,000
(Loss) gain on sales of real estate, net										$ 1,000
Cumberland Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss											4,800
Cash proceeds from sales of real estate					$ 44,600
Impairment of Real Estate											4,845
Magnolia Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration							$ 900
Moorestown Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration						$ 3,400		$ 11,800
Cash proceeds from sales of real estate						3,100		11,700
(Loss) gain on sales of real estate, net						1,800		8,800
Francis Scott Key Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration								2,400
Cash proceeds from sales of real estate								2,400
(Loss) gain on sales of real estate, net								$ 1,700
The Mall at Prince Georges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration						8,500	2,400
Cash proceeds from sales of real estate						8,200
(Loss) gain on sales of real estate, net						$ 4,600
Mall At Prince Georges And Magnolia Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sales of real estate							3,200
(Loss) gain on sales of real estate, net							$ 2,800
Plymouth Meeting Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss											39,300
Impairment of Real Estate											$ 39,256
Plymouth Meeting Mall | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration			$ 27,000
Cash proceeds from sales of real estate			$ 26,300