Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Land	$ 1,206,656	$ 1,199,384
Buildings and improvements	7,597,165	7,404,090
Real estate assets, at cost, total	8,803,821	8,603,474
Accumulated depreciation	(2,857,124)	(2,686,025)
Net operating real estate assets	5,946,697	5,917,449
Properties under development, including land	514,336	512,319
Investments in joint ventures	21,735	20,688
Total real estate assets	6,482,768	6,450,456
Accounts receivable – affiliates	21,432	21,833
Other assets, net	211,823	248,716
Cash and cash equivalents	601,584	23,184
Restricted cash	4,093	4,315
Total assets	7,321,700	6,748,504
Liabilities
Unsecured notes payable	3,224,871	2,524,099
Accounts payable and accrued expenses	167,453	171,719
Accrued real estate taxes	62,499	54,408
Distributions payable	84,138	80,973
Other liabilities	172,172	215,581
Total liabilities	3,711,133	3,046,780
Commitments and contingencies (Note 11)
Equity
Common shares of beneficial interest; $0.01 par value per share; 175,000 shares authorized; 109,110 and 109,110 issued; 106,844 and 106,878 outstanding at June 30, 2020 and December 31, 2019, respectively	1,068	1,069
Additional paid-in capital	4,574,387	4,566,731
Distributions in excess of net income attributable to common shareholders	(689,809)	(584,167)
Treasury shares, at cost (9,449 and 9,636 common shares at June 30, 2020 and December 31, 2019, respectively)	(341,637)	(348,419)
Accumulated other comprehensive loss	(5,797)	(6,529)
Total common equity	3,538,212	3,628,685
Non-controlling interests	72,355	73,039
Total equity	3,610,567	3,701,724
Total liabilities and equity	$ 7,321,700	$ 6,748,504