Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Assets:
Operating real estate, net of accumulated depreciation of 2,092,375 and $1,955,406, respectively		$ 9,256,277	$ 7,930,489
Investments and advances in real estate joint ventures		833,650	1,037,218
Real estate under development		157,970	132,331
Other real estate investments		214,253	266,157
Mortgages and other financing receivables		26,207	74,013
Cash and cash equivalents		180,913	187,322
Marketable securities	[1]	12,189	90,235
Accounts and notes receivable		172,758	172,386
Other assets		559,767	371,249
Total assets		11,413,984	10,261,400
Liabilities:
Notes payable	[2]	3,852,640	3,171,742
Mortgages payable	[3]	1,645,946	1,424,228
Dividends payable		111,480	111,143
Other liabilities		621,521	561,042
Total liabilities		6,231,587	5,268,155
Redeemable noncontrolling interests		92,739	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 413,222,609 and 411,819,818 shares, respectively		4,132	4,118
Paid-in capital		5,770,970	5,732,021
Cumulative distributions in excess of net income		(832,746)	(1,006,578)
Accumulated other comprehensive income		(14,744)	45,122
Total stockholders' equity		4,927,714	4,774,785
Noncontrolling interests		161,944	126,980
Total equity		5,089,658	4,901,765
Total liabilities and equity		$ 11,413,984	$ 10,261,400

[1] As of September 30, 2015 and December 31, 2014, the Company determined that $10.5 million and $87.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $1.7 million and $2.3 million, respectively, were classified within Level 3 of the fair value hierarchy.

[2] The Company determined that its valuation of Notes payable was classified within Level 2 of the fair value hierarchy.

[3] The Company determined that its valuation of Mortgages payable was classified within Level 3 of the fair value hierarchy.