Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Cash Flows from Operating Activities:
Net Income	$ 203,964		$ 211,384
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	114,208		116,216
Amortization of debt deferred costs and intangibles, net	2,952		(8,156)
Impairment loss	0		2,815
Equity in earnings of real estate joint ventures and partnerships, net	(16,331)		(14,467)
Gain on sale and acquisition of real estate joint venture and partnership interests	(1,718)		(11,599)
Gain on sale of property	(115,989)		(116,796)
Distributions of income from real estate joint ventures and partnerships, net	2,736		2,623
Changes in accrued rent and accounts receivable, net	(3,070)		(1,435)
Changes in other assets, net	(15,952)		(17,189)
Changes in accounts payable, accrued expenses and other liabilities, net	3,656		1,488
Other, net	3,712		6,062
Net cash provided by operating activities	178,168		170,946
Cash Flows from Investing Activities:
Acquisition of real estate and land	0		(58,173)
Development and capital improvements	(77,178)		(50,014)
Proceeds from sale of property and real estate equity investments, net	169,530		267,655
Change in restricted deposits and mortgage escrows	(31,531)		(13,461)
Notes receivable from real estate joint ventures and partnerships and other receivables - Advances	0		(289)
Notes receivable from real estate joint ventures and partnerships and other receivables - Collections	10,316		7,224
Real estate joint ventures and partnerships - Investments	(5,185)		(21,353)
Real estate joint ventures and partnerships - Distribution of capital	18,578		32,660
Purchase of investments	(3,000)		0
Proceeds from investments	51,288		0
Other, net	(11,899)		(7,086)
Net cash provided by investing activities	120,919		157,163
Cash Flows from Financing Activities:
Proceeds from issuance of debt	4,500		324,584
Principal payments of debt	(468,011)		(283,902)
Changes in unsecured credit facilities	216,000		48,500
Purchase of marketable securities in connection with the legal defeasance of debt	0		(5,823)
Proceeds from issuance of common shares of beneficial interest, net	1,838		5,778
Repurchase of preferred shares of beneficial interest	0		(275,000)
Common and preferred dividends paid	(126,477)		(126,269)
Debt issuance costs paid	(400)		(4,702)
Distributions to noncontrolling interests	(5,939)		(13,455)
Contributions from noncontrolling interests	980		33,884
Other, net	(179)		422
Net cash used in financing activities	(377,688)		(295,983)
Net (decrease) increase in cash and cash equivalents	(78,601)		32,126
Cash and cash equivalents at January 1	91,576	[1]	19,604
Cash and cash equivalents at September 30	12,975	[1]	51,730
Interest paid during the period (net of amount capitalized of $2,232 and $1,724, respectively)	75,117		85,594
Income taxes paid during the period	$ 1,705		$ 1,860

[1] Consolidated variable interest entities' assets held as collateral and debt included in the above balances (see Note 16):