Commitments and Contingencies - Environmental (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Environmental insurance coverage claims per occurrence	$ 25.0
Environmental insurance coverage claims aggregate	$ 25.0

Claims Exposure Protection Amount Per Aggregate Year

No definition available.

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Namespace Prefix:	pei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration