Basis of Presentation - Reverse Share Split (Details)		9 Months Ended
Jun. 16, 2022 USD ($)	Sep. 30, 2022
Real Estate Properties [Line Items]
Common Stock Conversion Ratio	15	15
Stockholders' Equity, Reverse Stock Split		On June 16, 2022, the Company effected a one-for-fifteen reverse share split of its common shares. Upon the effectiveness of the reverse share split, every 15 issued and outstanding common shares were combined into one issued and outstanding common share, with no change in par value per share, and the authorized number of common shares was proportionally reduced. Shareholders entitled to fractional shares as a result of the reverse share split were entitled to receive a cash payment in lieu of receiving fractional shares. All common share and per share data in the consolidated financial statements and notes to the consolidated financial statements have been retrospectively revised to reflect the reverse share split. Common shares underlying outstanding options, RSUs, PSUs and restricted shares were proportionately reduced and the respective exercise prices, if applicable, were proportionately increased. Additionally, the conversion rate of OP Units into common shares was automatically proportionally adjusted from one-for-one to fifteen-for-one. Total cash payment in lieu of fractional shares paid to entitled shareholders was less than $4 thousand. The reverse share split was primarily intended to bring the Company into compliance with the minimum bid price requirement for maintaining its listing on the New York Stock Exchange (the “NYSE”), and on July 1, 2022, the Company received notice from the NYSE that it had regained compliance with the minimum bid price requirement. The Company's common shares continues to trade under the symbol “PEI” and began trading on a split-adjusted basis on June 16, 2022. Notwithstanding the reverse share split, there is no assurance that the Company's securities will remain in compliance with the NYSE's listing standards or that its securities will remain listed on the NYSE.
Maximum
Real Estate Properties [Line Items]
Total cash payment in lieu of fractional shares paid	$ 4,000

Basis of Presentation - Reverse Share Split (Details)

9 Months Ended

Jun. 16, 2022

USD ($)

Sep. 30, 2022

Stockholders' Equity, Reverse Stock Split

On June 16, 2022, the Company effected a one-for-fifteen reverse share split of its common shares. Upon the effectiveness of the reverse share split, every 15 issued and outstanding common shares were combined into one issued and outstanding common share, with no change in par value per share, and the authorized number of common shares was proportionally reduced. Shareholders entitled to fractional shares as a result of the reverse share split were entitled to receive a cash payment in lieu of receiving fractional shares. All common share and per share data in the consolidated financial statements and notes to the consolidated financial statements have been retrospectively revised to reflect the reverse share split. Common shares underlying outstanding options, RSUs, PSUs and restricted shares were proportionately reduced and the respective exercise prices, if applicable, were proportionately increased. Additionally, the conversion rate of OP Units into common shares was automatically proportionally adjusted from one-for-one to fifteen-for-one. Total cash payment in lieu of fractional shares paid to entitled shareholders was less than $4 thousand. The reverse share split was primarily intended to bring the Company into compliance with the minimum bid price requirement for maintaining its listing on the New York Stock Exchange (the “NYSE”), and on July 1, 2022, the Company received notice from the NYSE that it had regained compliance with the minimum bid price requirement. The Company's common shares continues to trade under the symbol “PEI” and began trading on a split-adjusted basis on June 16, 2022. Notwithstanding the reverse share split, there is no assurance that the Company's securities will remain in compliance with the NYSE's listing standards or that its securities will remain listed on the NYSE.

Maximum

Real Estate Properties [Line Items]

Total cash payment in lieu of fractional shares paid

$ 4,000