Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Real estate assets:
Operating properties, net of accumulated depreciation of $633,654 and $577,139 in 2020 and 2019, respectively	$ 5,740,337	$ 5,669,324
Projects under development	368,414	410,097
Land	97,354	116,860
Total real estate assets	6,206,105	6,196,281
Real estate assets and other assets held for sale, net of accumulated depreciation and amortization of $61,093 in 2019	0	360,582
Cash and cash equivalents	124,632	15,603
Restricted cash	1,947	2,005
Notes and accounts receivable	28,533	23,680
Deferred rents receivable	109,458	102,314
Investment in unconsolidated joint ventures	128,916	133,884
Intangible assets, net	240,286	257,649
Other assets	62,057	59,449
Total assets	6,901,934	7,151,447
Liabilities:
Notes payable	1,944,034	2,222,975
Accounts payable and accrued expenses	144,984	209,904
Deferred income	55,290	52,269
Intangible liabilities, net of accumulated amortization of $61,084 and $55,798 in 2020 and 2019, respectively	77,819	83,105
Other liabilities	120,809	134,128
Liabilities of real estate assets held for sale, net of accumulated amortization of $7,771 in 2019	0	21,231
Total liabilities	2,342,936	2,723,612
Commitments and contingencies
Stockholders' investment:
Preferred stock, $1 par value, 20,000,000 shares authorized, 1,716,837 shares issued and outstanding in 2019	0	1,717
Common stock, $1 par value, 300,000,000 shares authorized, 151,124,621 and 149,347,382 shares issued in 2020 and 2019, respectively	151,125	149,347
Additional paid-in capital	5,538,875	5,493,883
Treasury stock at cost, 2,584,933 shares in 2020 and 2019	(148,473)	(148,473)
Distributions in excess of cumulative net income	(1,006,820)	(1,137,200)
Total stockholders' investment	4,534,707	4,359,274
Nonredeemable noncontrolling interests	24,291	68,561
Total equity	4,558,998	4,427,835
Total liabilities and equity	$ 6,901,934	$ 7,151,447