Investments in Partnerships - Summary of Equity Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments in real estate, at cost:
Operating properties	$ 739,183	$ 847,560
Construction in progress	3,110	6,456
Total investments in real estate	742,293	854,016
Accumulated depreciation	(228,716)	(247,133)
Net investments in real estate	513,577	606,883
Cash and cash equivalents	45,968	59,004
Deferred costs and other assets, net	151,514	155,247
Total assets	711,059	821,134
LIABILITIES AND PARTNERS’ INVESTMENT:
Mortgage loans payable, net	404,055	493,904
FDP Term Loan, net	194,602	194,602
Partnership Loan	119,067	115,543
Other liabilities	146,852	141,619
Total liabilities	864,576	945,668
Net investment	(153,517)	(124,534)
Partners’ share	(81,841)	(62,771)
PREIT’s share	(71,676)	(61,763)
Excess investment	6,963	6,718
Net investments and advances	(64,713)	(55,045)
Investment in partnerships, at equity	7,967	16,525
Distributions in excess of partnership investments	$ (72,680)	$ (71,570)