Investments in Partnerships - Summary of Share of Equity in Loss of Partnerships (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity Method Investments And Joint Ventures [Abstract]
Real estate revenue	$ 27,790	$ 24,198	$ 85,827	$ 75,484
Expenses:
Property operating and other expenses	(11,878)	(13,924)	(35,759)	(35,884)
Interest expense	(11,309)	(6,038)	(33,104)	(18,008)
Depreciation and amortization	(6,715)	(10,570)	(20,051)	(25,965)
Total expenses	(29,902)	(30,532)	(88,914)	(79,857)
Net loss	(2,112)	(6,334)	(3,087)	(4,373)
Less: Partners’ share	719	3,183	810	1,884
PREIT’s share	(1,393)	(3,151)	(2,277)	(2,489)
Amortization of excess investment	(36)	(108)	(152)	(309)
Equity in loss of partnerships	$ (1,429)	$ (3,259)	$ (2,429)	$ (2,798)