Share Based Compensation - Assumptions Used in Monte Carlo Simulations Used to Determine Aggregate Fair Values (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 29, 2019	Jan. 19, 2018	Feb. 27, 2017
Absolute TSR RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted	210,193	115,614
Aggregate fair value of shares granted	$ 1,550	$ 1,336
Weighted average fair value per share	$ 7.38	$ 10.93
Volatility	40.30%	31.60%
Risk free interest rate	2.58%	2.19%
Relative TSR RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted	210,193	115,614	140,490
Aggregate fair value of shares granted	$ 1,890	$ 1,779	$ 1,620
Weighted average fair value per share	$ 8.99	$ 14.56	$ 11.53
Volatility	40.30%	31.60%	25.80%
Risk free interest rate	2.58%	2.19%	1.42%
PREIT Stock Beta compared to Dow Jones US Real Estate Index			0.706

Aggregate Fair Value of Awards on Grant Date

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- Definition

Stock Beta Of Restricted Stock Unit Awards

+ References

No definition available.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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