Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Real estate assets:
Operating properties, net of accumulated depreciation of $854,770 and $803,073 in 2021 and 2020, respectively	$ 6,191,205	$ 6,232,546
Projects under development	136,123	57,389
Land	150,766	162,406
Total properties	6,478,094	6,452,341
Real estate assets and other assets held for sale, net	0	125,746
Cash and cash equivalents	5,532	4,290
Restricted cash	1,236	1,848
Accounts receivable	13,205	20,248
Deferred rents receivable	152,278	138,341
Investment in unconsolidated joint ventures	111,351	125,481
Intangible assets, net	158,189	189,164
Other assets	57,479	49,939
Total assets	6,977,364	7,107,398
Liabilities:
Notes payable	2,047,599	2,162,719
Accounts payable and accrued expenses	203,627	186,267
Deferred income	76,475	62,319
Intangible liabilities, net	56,521	69,846
Other liabilities	115,600	118,103
Liabilities of real estate assets held for sale, net	0	12,606
Total liabilities	2,499,822	2,611,860
Commitments and contingencies
Stockholders' investment:
Common stock, $1 par value per share, 300,000,000 shares authorized, 151,272,969 and 151,149,289 shares issued and outstanding in 2021 and 2020, respectively	151,273	151,149
Additional paid-in capital	5,547,808	5,542,762
Treasury stock at cost, 2,584,933 shares in 2021 and 2020	(148,473)	(148,473)
Distributions in excess of cumulative net income	(1,105,516)	(1,078,304)
Total stockholders' investment	4,445,092	4,467,134
Nonredeemable noncontrolling interests	32,450	28,404
Total equity	4,477,542	4,495,538
Total liabilities and equity	$ 6,977,364	$ 7,107,398