Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
Cash Flows from Operating Activities:
Net Income	$ 55,399		$ 20,127
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	73,359		78,562
Amortization of deferred financing costs and debt discount	316		2,079
Impairment loss	15,074		22,550
Equity in losses (earnings) of real estate joint ventures and partnerships, net	11,620		(6,976)
Gain on acquisition	0		(4,559)
Gain on sale of property	(35,422)		(1,196)
Gain on sale of real estate joint venture and partnership interests	(5,562)		0
Distributions of income from real estate joint ventures and partnerships, net	1,562		1,500
Changes in accrued rent and accounts receivable, net	10,064		17,541
Changes in other assets, net	(15,193)		(14,692)
Changes in accounts payable, accrued expenses and other liabilities, net	(9,458)		(16,142)
Other, net	7,686		5,687
Net cash provided by operating activities	109,445		104,481
Cash Flows from Investing Activities:
Acquisition of real estate and land	(116,960)		(45,293)
Development and capital improvements	(45,585)		(36,799)
Proceeds from sale of property and real estate equity investments, net	419,370		43,013
Change in restricted deposits and mortgage escrows	(22,010)		(21,795)
Notes receivable from real estate joint ventures and partnerships and other receivables:
Advances	(4,865)		(2,251)
Collections	73,563		4,375
Real estate joint ventures and partnerships:
Investments	(7,129)		(12,626)
Distributions of capital	7,568		8,373
Proceeds from tax increment revenue bonds	0		16,545
Net cash provided by (used in) investing activities	303,952		(46,458)
Proceeds from issuance of:
Debt	0		15,750
Common shares of beneficial interest, net	3,212		3,650
Principal payments of debt	(384,116)		(87,303)
Changes in unsecured revolving credit facilities	62,500		97,850
Common and preferred dividends paid	(86,704)		(82,833)
Debt issuance costs paid	(1,685)		(356)
Distributions to noncontrolling interests	(7,333)		(7,259)
Contributions from noncontrolling interests	2,123		3,717
Other, net	61		(724)
Net cash used in financing activities	(411,942)		(57,508)
Net increase in cash and cash equivalents	1,455		515
Cash and cash equivalents at January 1	13,642	[1]	23,859
Cash and cash equivalents at June 30	15,097	[1]	24,374
Interest paid during the period (net of amount capitalized of $1,594 and $654, respectively)	61,959		70,863
Income taxes paid during the period	$ 1,548		$ 1,578

[1] Consolidated Variable Interest Entities’ Assets and Liabilities included in the above balances (See Note 17):