Investments in Partnerships - Summary of Equity Method Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investments in real estate, at cost:
Operating properties	$ 739,970	$ 847,560
Construction in progress	4,938	6,456
Total investments in real estate	744,908	854,016
Accumulated depreciation	(233,300)	(247,133)
Net investments in real estate	511,608	606,883
Cash and cash equivalents	22,754	59,004
Deferred costs and other assets, net	149,320	155,247
Total assets	683,682	821,134
LIABILITIES AND PARTNERS’ INVESTMENT:
Mortgage loans payable, net	401,844	493,904
FDP Term Loan, net	111,544	194,602
Partnership Loan	206,259	115,543
Other liabilities	151,777	141,619
Total liabilities	871,424	945,668
Net investment	(187,742)	(124,534)
Partners’ share	(98,960)	(62,771)
PREIT’s share	(88,782)	(61,763)
Excess investment	6,987	6,718
Net investments and advances	(81,795)	(55,045)
Investment in partnerships, at equity	7,907	16,525
Distributions in excess of partnership investments	$ (89,702)	$ (71,570)