Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash Flows from Operating Activities:
Net Income	$ 44,817		$ 22,638
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,731		38,850
Amortization of deferred financing costs, net	(9,300)		264
Impairment loss	292		10,023
Equity in earnings of real estate joint ventures and partnerships, net	(4,613)		(4,075)
Gain on sale of real estate joint venture and partnership interests	(11,509)		(5,562)
Gain on sale of property	(142)		(4,074)
Distributions of income from real estate joint ventures and partnerships, net	976		601
Changes in accrued rent and accounts receivable, net	8,256		16,703
Changes in other assets, net	(3,234)		(5,503)
Changes in accounts payable, accrued expenses and other liabilities, net	(30,232)		(27,524)
Other, net	2,599		2,771
Net cash provided by operating activities	37,641		45,112
Cash Flows from Investing Activities:
Acquisition of real estate and land	(18,880)		(20,135)
Development and capital improvements	(14,101)		(18,633)
Proceeds from sale of property and real estate equity investments, net	3,914		13,629
Change in restricted deposits and mortgage escrows	561		1,106
Notes receivable from real estate joint ventures and partnerships and other receivables:
Advances	0		(79)
Collections	3,937		59,897
Real estate joint ventures and partnerships:
Investments	(240)		(5,518)
Distributions of capital	14,393		3,347
Net cash (used in) provided by investing activities	(10,416)		33,614
Cash Flows from Financing Activities:
Proceeds from the issuance of debt	298,584		0
Principal payments of debt	(101,643)		(31,204)
Changes in unsecured credit facilities	(66,000)		3,500
Proceeds from the issuance of common shares of beneficial interest, net	1,887		458
Repurchase of preferred shares of beneficial interest	(75,000)		0
Common and preferred dividends paid	(44,122)		(43,333)
Debt issuance costs paid	(2,100)		(70)
Distributions to noncontrolling interests	(3,858)		(3,756)
Other, net	223		61
Net cash provided by (used in) financing activities	7,971		(74,344)
Net increase in cash and cash equivalents	35,196		4,382
Cash and cash equivalents at January 1	19,604	[1]	13,642
Cash and cash equivalents at March 31	54,800	[1]	18,024
Interest paid during the period (net of amount capitalized of $569 and $783 respectively)	35,794		40,836
Income taxes paid during the period	$ 0		$ 0

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