CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
INVESTMENTS IN REAL ESTATE, at cost:
Operating properties	$ 3,297,520	$ 3,216,231
Construction in progress	64,019	60,452
Land held for development	6,350	8,721
Total investments in real estate	3,367,889	3,285,404
Accumulated depreciation	(1,015,647)	(1,061,051)
Net investments in real estate	2,352,242	2,224,353
INVESTMENTS IN PARTNERSHIPS, at equity:	161,029	140,882
OTHER ASSETS:
Cash and cash equivalents	22,855	40,433
Tenant and other receivables (net of allowance for doubtful accounts of $6,417 and $11,929 at December 31, 2015 and 2014, respectively)	40,324	40,566
Intangible assets (net of accumulated amortization of $13,441 and $11,873 at December 31, 2015 and 2014, respectively)	22,248	6,452
Deferred costs and other assets, net	81,574	87,017
Disposal Group, Including Discontinued Operation, Assets, Current	126,244	0
Total assets	2,806,516	2,539,703
LIABILITIES:
Mortgage loans payable	1,325,495	1,407,947
Term Loans	400,000	130,000
Revolving Facility	65,000	0
Tenants’ deposits and deferred rent	14,631	15,541
Distributions in excess of partnership investments	65,547	65,956
Fair value of derivative instruments	2,756	2,490
Disposal Group, Including Discontinued Operation, Liabilities	69,918	0
Accrued expenses and other liabilities	78,539	73,032
Total liabilities	$ 2,021,886	$ 1,694,966
COMMITMENTS AND CONTINGENCIES (Note 11)
EQUITY:
Shares of beneficial interest, $1.00 par value per share; 200,000 shares authorized; 69,197 issued and outstanding shares at December 31, 2015 and 68,801 shares at December 31, 2014	$ 69,197	$ 68,801
Capital contributed in excess of par	1,476,397	1,474,183
Accumulated other comprehensive loss	(4,193)	(6,002)
Distributions in excess of net income	(912,221)	(721,605)
Total equity – Pennsylvania Real Estate Investment Trust	629,261	815,458
Noncontrolling interest	155,369	29,279
Total equity	784,630	844,737
Total liabilities and equity	2,806,516	2,539,703
Series A Preferred Shares[Member]
EQUITY:
Preferred shares, value	46	46
Total equity	46	46
Series B Preferred Shares [Member]
EQUITY:
Preferred shares, value	35	35
Total equity	$ 35	$ 35