Summary of Quarterly Results - Summary of Unaudited Quarterly Financial Information (Detail) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Impairment losses			$ 2,300,000		$ 16,100,000		$ 1,300,000
Revenue from continuing operations	111,355,000	[1]	105,137,000		106,825,000		109,386,000		119,396,000	[1]	110,274,000		104,943,000		104,065,000		432,703,000		438,678,000
Revenue from discontinued operations									634,000	[1]	2,491,000		2,746,000		4,143,000				10,014,000
Income (loss) from discontinued operations									408,000	[1],[2]	21,978,000	[2]	1,000,000	[2]	34,276,000	[2]			57,662,000	[2]	1,769,000
Net (loss) income	19,030,000	[1],[3]	(886,000)	[3]	(24,050,000)	[3]	(8,356,000)	[3]	7,831,000	[1],[3]	12,584,000	[3]	(9,009,000)	[3]	25,807,000	[3]	(14,262,000)	[3]	37,213,000	[3]	(42,550,000)
Net income (loss) attributable to PREIT	18,458,000	[1],[3]	(859,000)	[3]	(23,325,000)	[3]	(8,104,000)	[3]	7,550,000	[1],[3]	12,202,000	[3]	(8,695,000)	[3]	24,802,000	[3]	(13,830,000)	[3]	35,859,000	[3]	(40,837,000)
Income (loss) from discontinued operations per share - basic and diluted (in dollars per share)									$ 0.01	[1]	$ 0.32		$ 0.02		$ 0.59		$ 0.00		$ 0.87		$ 0.03
Net loss per share - basic and diluted (in dollars per share)	$ 0.21		$ (0.07)		$ (0.40)		$ (0.18)		$ 0.05	[1]	$ 0.12		$ (0.20)		$ 0.37		$ (0.44)		$ 0.31		$ (0.89)
Gain Loss On Sale Of Real Estate	13,100,000																1,774,000
Gains (Losses) on Sales of Other Real Estate	$ 1,800,000

[1] Fourth Quarter revenue includes a significant portion of annual percentage rent as most percentage rent minimum sales levels are met in the fourth quarter.

[2] Includes impairment losses of $1.3 million (1st Quarter 2014), $16.1 million (2nd Quarter 2014) and $2.3 million (3rd Quarter 2014). Includes impairment losses on discontinued operations of $23.7 million (3rd Quarter 2013)

[3] Includes gains on sales of discontinued operations (before non controlling interest) of $33.4 million (1st Quarter 2013), $45.1 million (3rd Quarter 2013).