Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Cash Flows from Operating Activities:
Net Income	$ 101,765		$ 148,995
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	77,514		78,607
Amortization of debt deferred costs and intangibles, net	1,052		(8,747)
Impairment loss	0		457
Equity in earnings of real estate joint ventures and partnerships, net	(8,450)		(9,342)
Gain on sale and acquisition of real estate joint venture and partnership interests	(1,718)		(11,592)
Gain on sale of property	(46,493)		(78,419)
Distributions of income from real estate joint ventures and partnerships, net	1,503		1,723
Changes in accrued rent and accounts receivable, net	1,345		6,266
Changes in other assets, net	(12,935)		(12,844)
Changes in accounts payable, accrued expenses and other liabilities, net	(2,412)		(7,710)
Other, net	1,824		3,911
Net cash provided by operating activities	112,995		111,305
Cash Flows from Investing Activities:
Acquisition of real estate and land	0		(54,753)
Development and capital improvements	(35,774)		(30,644)
Proceeds from sale of property and real estate equity investments, net	66,768		155,862
Change in restricted deposits and mortgage escrows	(2,209)		34,606
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	7,633		6,282
Real estate joint ventures and partnerships - Investments	(5,119)		(17,698)
Real estate joint ventures and partnerships - Distribution of capital	11,001		19,201
Purchase of investments	(1,250)		0
Proceeds from investments	50,788		0
Other, net	(11,826)		(899)
Net cash provided by investing activities	80,012		111,668
Cash Flows from Financing Activities:
Proceeds from issuance of debt	0		300,584
Principal payments of debt	(334,626)		(199,672)
Changes in unsecured credit facilities	152,000		38,500
Proceeds from issuance of common shares of beneficial interest, net	1,137		5,569
Repurchase of preferred shares of beneficial interest	0		(275,000)
Common and preferred dividends paid	(84,303)		(86,639)
Debt issuance costs paid	(273)		(4,693)
Distributions to noncontrolling interests	(3,305)		(8,241)
Contributions from noncontrolling interests	980		10,182
Other, net	(158)		207
Net cash used in financing activities	(268,548)		(219,203)
Net (decrease) increase in cash and cash equivalents	(75,541)		3,770
Cash and cash equivalents at January 1	91,576	[1]	19,604
Cash and cash equivalents at June 30	16,035	[1]	23,374
Interest paid during the period (net of amount capitalized of $1,410 and $1,104, respectively)	45,429		52,508
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):