Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Land	$ 1,216,942	$ 1,199,384
Buildings and improvements	7,677,676	7,404,090
Real estate assets, at cost, total	8,894,618	8,603,474
Accumulated depreciation	(2,944,769)	(2,686,025)
Net operating real estate assets	5,949,849	5,917,449
Properties under development, including land	522,664	512,319
Investments in joint ventures	20,992	20,688
Total real estate assets	6,493,505	6,450,456
Accounts receivable – affiliates	20,152	21,833
Other assets, net	217,534	248,716
Cash and cash equivalents	589,614	23,184
Restricted cash	3,918	4,315
Total assets	7,324,723	6,748,504
Liabilities
Unsecured notes payable	3,225,799	2,524,099
Accounts payable and accrued expenses	183,654	171,719
Accrued real estate taxes	87,159	54,408
Distributions payable	84,137	80,973
Other liabilities	177,967	215,581
Total liabilities	3,758,716	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; 106,849 and 106,878 outstanding at September 30, 2020 and December 31, 2019, respectively	1,068	1,069
Additional paid-in capital	4,577,813	4,566,731
Distributions in excess of net income attributable to common shareholders	(737,556)	(584,167)
Treasury shares, at cost (9,454 and 9,636 common shares at September 30, 2020 and December 31, 2019, respectively)	(341,831)	(348,419)
Accumulated other comprehensive loss	(5,431)	(6,529)
Total common equity	3,494,063	3,628,685
Non-controlling interests	71,944	73,039
Total equity	3,566,007	3,701,724
Total liabilities and equity	$ 7,324,723	$ 6,748,504