Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Real estate assets:
Operating properties, net of accumulated depreciation of $181,928 and $215,856 in 2017 and 2016, respectively	$ 3,437,591	$ 3,432,522
Projects under development	203,509	162,387
Land	4,221	4,221
Total properties	3,645,321	3,599,130
Real estate assets and other assets held for sale, net of accumulated depreciation and amortization of $73,525 in 2017	44,653	0
Cash and cash equivalents	35,755	35,687
Restricted cash	13,485	15,634
Notes and accounts receivable, net of allowance for doubtful accounts of $1,410 and $1,167 in 2017 and 2016, respectively	25,426	27,683
Deferred rents receivable	39,833	39,464
Investment in unconsolidated joint ventures	128,589	179,397
Intangible assets, net of accumulated amortization of $70,588 and $53,483 in 2017 and 2016, respectively	240,770	245,529
Other assets	32,457	29,083
Total assets	4,206,289	4,171,607
Liabilities:
Notes payable	1,113,766	1,380,920
Liabilities of real estate assets held for sale	130,691	0
Accounts payable and accrued expenses	119,803	109,278
Deferred income	35,401	33,304
Intangible liabilities, net of accumulated amortization of $16,904 and $12,227 in 2017 and 2016, respectively	85,105	89,781
Other liabilities	39,007	44,084
Total liabilities	1,523,773	1,657,367
Commitments and contingencies
Stockholders' investment:
Preferred stock, $1 par value, 20,000,000 shares authorized, 6,867,357 shares issued and outstanding in 2017 and 2016	6,867	6,867
Common stock, $1 par value, 700,000,000 shares authorized, 429,225,700 and 403,746,938 shares issued in 2017 and 2016, respectively	429,226	403,747
Additional paid-in capital	3,595,581	3,407,430
Treasury stock at cost, 10,329,082 shares in 2017 and 2016	(148,373)	(148,373)
Distributions in excess of cumulative net income	(1,257,697)	(1,214,114)
Total stockholders' investment	2,625,604	2,455,557
Nonredeemable noncontrolling interests	56,912	58,683
Total equity	2,682,516	2,514,240
Total liabilities and equity	$ 4,206,289	$ 4,171,607