Investments in Partnerships - Summary of Share of Equity in (Loss) Income of Partnerships (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Equity Method Investments And Joint Ventures [Abstract]
Capitalized interest expense	$ 103	$ 1,091

Interest cost capitalized equity method investments.

No definition available.

Name:	pei_InterestCostCapitalizedEquityMethodInvestments
Namespace Prefix:	pei_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration