Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Cash Flows from Operating Activities:
Net Income	$ 211,384		$ 97,446
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	116,216		110,300
Amortization of deferred financing costs, net	(8,156)		386
Impairment loss	2,815		15,410
Equity in (earnings) losses of real estate joint ventures and partnerships, net	(14,467)		6,715
Gain on acquisition	0		(1,869)
Gain on sale of real estate joint venture and partnership interests	(11,599)		(5,562)
Gain on sale of property	(116,796)		(50,583)
Distributions of income from real estate joint ventures and partnerships, net	2,623		2,160
Changes in accrued rent and accounts receivable, net	(1,435)		2,095
Changes in other assets, net	(17,189)		(17,740)
Changes in accounts payable, accrued expenses and other liabilities, net	1,488		(7,021)
Other, net	6,062		10,472
Net cash provided by operating activities	170,946		162,209
Cash Flows from Investing Activities:
Acquisition of real estate and land	(58,173)		(196,801)
Development and capital improvements	(50,014)		(68,345)
Proceeds from sale of property and real estate equity investments, net	267,655		480,502
Change in restricted deposits and mortgage escrows	(13,461)		50
Notes receivable from real estate joint ventures and partnerships and other receivables:
Advances	(289)		(6,468)
Collections	7,224		74,296
Real estate joint ventures and partnerships:
Investments	(21,353)		(8,445)
Distributions of capital	32,660		31,910
Other, net	(7,086)		0
Net cash provided by investing activities	157,163		306,699
Cash Flows from Financing Activities:
Proceeds from issuance of debt	324,584		0
Principal payments of debt	(283,902)		(412,091)
Changes in unsecured credit facilities	48,500		83,500
Purchase of marketable securities in connection with the legal defeasance of debt	(5,823)		0
Proceeds from issuance of common shares of beneficial interest, net	5,778		4,753
Repurchase of preferred shares of beneficial interest	(275,000)		0
Common and preferred dividends paid	(126,269)		(130,105)
Debt issuance costs paid	(4,702)		(1,735)
Distributions to noncontrolling interests	(13,455)		(10,119)
Contributions from noncontrolling interests	33,884		2,123
Other, net	422		213
Net cash used in financing activities	(295,983)		(463,461)
Net increase in cash and cash equivalents	32,126		5,447
Cash and cash equivalents at January 1	19,604	[1]	13,642
Cash and cash equivalents at September 30	51,730	[1]	19,089
Interest paid during the period (net of amount capitalized of $1,724 and $2,394, respectively)	85,594		98,024
Income taxes paid during the period	$ 1,860		$ 1,548

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