Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Operating real estate, net of accumulated depreciation of $2,054,698 and $1,955,406, respectively	$ 9,290,447	$ 7,930,489
Investments and advances in real estate joint ventures	880,300	1,037,218
Real estate under development	136,235	132,331
Other real estate investments	240,725	266,157
Mortgages and other financing receivables	22,990	74,013
Cash and cash equivalents	145,832	187,322
Marketable securities	24,251	90,235
Accounts and notes receivable	177,768	172,386
Other assets	548,756	371,249
Total assets	11,467,304	10,261,400
Liabilities:
Notes payable	3,768,945	3,171,742
Mortgages payable	1,768,827	1,424,228
Dividends payable	111,455	111,143
Other liabilities	591,097	561,042
Total liabilities	6,240,324	5,268,155
Redeemable noncontrolling interests	91,466	91,480
Stockholders' equity:
Preferred stock, $1.00 par value, authorized 5,959,100 shares 102,000 shares issued and outstanding (in series) Aggregate liquidation preference $975,000	102	102
Common stock, $.01 par value, authorized 750,000,000 shares issued and outstanding 413,119,292 and 411,819,818 shares, respectively	4,131	4,118
Paid-in capital	5,767,830	5,732,021
Cumulative distributions in excess of net income	(796,571)	(1,006,578)
Accumulated other comprehensive income	(1,906)	45,122
Total stockholders' equity	4,973,586	4,774,785
Noncontrolling interests	161,928	126,980
Total equity	5,135,514	4,901,765
Total liabilities and equity	$ 11,467,304	$ 10,261,400