CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
INVESTMENTS IN REAL ESTATE, at cost:
Operating properties	$ 3,099,034	$ 3,063,531
Construction in progress	106,011	115,182
Land held for development	5,881	5,881
Total investments in real estate	3,210,926	3,184,594
Accumulated depreciation	(1,202,722)	(1,118,582)
Net investments in real estate	2,008,204	2,066,012
INVESTMENTS IN PARTNERSHIPS, at equity:	159,993	131,124
OTHER ASSETS:
Cash and cash equivalents	12,211	18,084
Tenant and other receivables (net of allowance for doubtful accounts of $2,845 and $6,597 at December 31, 2019 and 2018, respectively)	41,261	38,914
Intangible assets (net of accumulated amortization of $18,248 and $15,543 at December 31, 2019 and 2018, respectively)	13,404	17,868
Deferred costs and other assets, net	103,688	110,805
Assets held for sale	12,506	22,307
Total assets	2,351,267	2,405,114
LIABILITIES:
Mortgage loans payable, net	899,753	1,047,906
Term Loans, net	548,025	547,289
Revolving Facilities	255,000	65,000
Tenants’ deposits and deferred rent	13,006	15,400
Distributions in excess of partnership investments	87,916	92,057
Fair value of derivative instruments	13,126	3,010
Accrued expenses and other liabilities	107,016	87,901
Total liabilities	1,923,842	1,858,563
COMMITMENTS AND CONTINGENCIES (Note 11)
EQUITY:
Shares of beneficial interest, $1.00 par value per share; 200,000 shares authorized; 77,550 shares issued and outstanding at December 31, 2019 and 70,495 shares issued and outstanding at December 31, 2018	77,550	70,495
Capital contributed in excess of par	1,766,883	1,671,042
Accumulated other comprehensive (loss)/income	(12,556)	5,408
Distributions in excess of net income	(1,408,352)	(1,306,318)
Total equity – Pennsylvania Real Estate Investment Trust	423,679	440,781
Noncontrolling interest	3,746	105,770
Total equity	427,425	546,551
Total liabilities and equity	2,351,267	2,405,114
Series B Preferred Shares, $.01 par value per share; 25,000 shares authorized; 3,450 shares issued and outstanding at December 31, 2019 and 2018; liquidation preference of $86,250
EQUITY:
Preferred Shares	35	35
Series C Preferred Shares, $.01 par value per share; 25,000 shares authorized; 6,900 shares issued and outstanding at December 31, 2019 and 2018; liquidation preference of $172,500
EQUITY:
Preferred Shares	69	69
Series D Preferred Shares, $.01 par value per share; 25,000 shares authorized; 5,000 shares issued and outstanding at December 31, 2019 and 2018; liquidation preference of $125,000
EQUITY:
Preferred Shares	$ 50	$ 50