Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
Cash Flows from Operating Activities:
Net (Loss) Income	$ (15,831)		$ 43,033
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	118,833		111,446
Amortization of deferred financing costs and debt discount	5,072		3,861
Impairment loss	72,739		21,002
Equity in earnings of real estate joint ventures and partnerships, net	(3,942)		(9,321)
Gain on acquisition	(4,559)
Gain on land and merchant development sales	(1,346)
Gain on sale of property	(828)		(1,586)
Loss on redemption of convertible senior unsecured notes			135
Distributions of income from real estate joint ventures and partnerships, net	1,775		1,289
Changes in accrued rent and accounts receivable, net	9,270		5,821
Changes in other assets, net	(17,856)		(14,122)
Changes in accounts payable, accrued expenses and other liabilities, net	(18,853)		(11,969)
Other, net	8,211		8,462
Net cash provided by operating activities	152,685		158,051
Cash Flows from Investing Activities:
Investment in property	(114,622)		(85,338)
Proceeds from sale and disposition of property, net	52,549		17,302
Change in restricted deposits and mortgage escrows	(668)		(49,882)
Notes receivable from real estate joint ventures and partnerships and other receivables:
Advances	(2,756)		(7,602)
Collections	14,980		15,127
Real estate joint ventures and partnerships:
Investments	(18,583)		(1,213)
Distributions of capital	13,714		12,296
Other, net	16,545		1,522
Net cash used in investing activities	(38,841)		(97,788)
Cash Flows from Financing Activities:
Proceeds from issuance of debt	215,750		336
Proceeds from issuance of common shares of beneficial interest, net	3,935		2,030
Principal payments of debt	(317,559)		(100,860)
Changes in unsecured revolving credit facilities	115,300		50,000
Common and preferred dividends paid	(124,277)		(118,472)
Debt issuance costs paid	(3,850)		(6,367)
Other, net	(6,821)		(8,700)
Net cash used in financing activities	(117,522)		(182,033)
Net decrease in cash and cash equivalents	(3,678)		(121,770)
Cash and cash equivalents at January 1	23,859	[1]	153,584
Cash and cash equivalents at September 30	$ 20,181	[1]	$ 31,814

[1] Consolidated Variable Interest Entities' Assets and Liabilities included in the above balances (See Note 3):