Investments in Partnerships - Summary of Share of Equity in Income of Partnerships (Detail) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity Method Investments And Joint Ventures [Abstract]
Capitalized interest expense	$ 1,602	$ 1,371	$ 4,554	$ 3,292

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