Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Cash Flows from Operating Activities:
Net Income	$ 20,127		$ 23,792
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	78,562		74,149
Amortization of deferred financing costs and debt discount	2,079		2,446
Impairment loss	22,550		16,061
Equity in earnings of real estate joint ventures and partnerships, net	(6,976)		(5,866)
Gain on acquisition	(4,559)
Gain on land and merchant development sales	(963)
Gain on sale of property	(233)		(1,460)
Loss on redemption of convertible senior unsecured notes			135
Distributions of income from real estate joint ventures and partnerships	1,500		853
Changes in accrued rent and accounts receivable, net	17,541		9,102
Changes in other assets, net	(14,692)		(9,998)
Changes in accounts payable, accrued expenses and other liabilities, net	(16,142)		(14,688)
Other, net	5,687		5,958
Net cash provided by operating activities	104,481		100,484
Cash Flows from Investing Activities:
Investment in property	(82,092)		(47,357)
Proceeds from sale and disposition of property, net	43,013		17,248
Change in restricted deposits and mortgage escrows	(21,795)		159
Notes receivable from real estate joint ventures and partnerships and other receivables:
Advances	(2,251)		(4,295)
Collections	4,375		12,592
Real estate joint ventures and partnerships:
Investments	(12,626)		(1,054)
Distributions of capital	8,373		8,944
Other, net	16,545		1,522
Net cash used in investing activities	(46,458)		(12,241)
Cash Flows from Financing Activities:
Proceeds from issuance of debt	15,750
Proceeds from issuance of common shares of beneficial interest, net	3,650		1,616
Principal payments of debt	(87,303)		(73,993)
Changes in unsecured revolving credit facilities	97,850
Common and preferred dividends paid	(82,833)		(78,956)
Debt issuance costs paid	(356)		(6,233)
Other, net	(4,266)		(6,283)
Net cash used in financing activities	(57,508)		(163,849)
Net increase (decrease) in cash and cash equivalents	515		(75,606)
Cash and cash equivalents at January 1	23,859	[1]	153,584
Cash and cash equivalents at June 30	$ 24,374	[1]	$ 77,978

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