Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Real estate assets:
Operating properties, net of accumulated depreciation of $253,362 and $215,856 in 2017 and 2016, respectively	$ 3,490,181	$ 3,432,522
Projects under development	248,242	162,387
Land	4,221	4,221
Total properties	3,742,644	3,599,130
Cash and cash equivalents	62,167	35,687
Restricted cash	437	15,634
Notes and accounts receivable, net of allowance for doubtful accounts of $626 and $1,167 in 2017 and 2016, respectively	16,291	27,683
Deferred rents receivable	53,483	39,464
Investment in unconsolidated joint ventures	109,222	179,397
Intangible assets, net of accumulated amortization of $99,063 and $53,483 in 2017 and 2016, respectively	211,786	245,529
Other assets	28,170	29,083
Total assets	4,224,200	4,171,607
Liabilities:
Notes payable	1,095,177	1,380,920
Accounts payable and accrued expenses	160,101	109,278
Deferred income	35,918	33,304
Intangible liabilities, net of accumulated amortization of $25,709 and $12,227 in 2017 and 2016, respectively	76,299	89,781
Other liabilities	39,385	44,084
Total liabilities	1,406,880	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, 430,349,620 and 403,746,938 shares issued in 2017 and 2016, respectively	430,350	403,747
Additional paid-in capital	3,604,269	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	(1,127,813)	(1,214,114)
Total stockholders' investment	2,765,300	2,455,557
Nonredeemable noncontrolling interests	52,020	58,683
Total equity	2,817,320	2,514,240
Total liabilities and equity	$ 4,224,200	$ 4,171,607